Tag Archives: denial of service

Link11 Discovers Record Number of DDoS Attacks in First Half of 2021

In H1 2021, cyber criminals targeted businesses in record numbers as they continued to exploit vulnerabilities caused by the pandemic A report published by Link11, Europe’s leading IT security provider in cyber resilience, suggests there has been a 33% increase in the number of DDoS attacks in H1 2021. Between January and June, the Link11 Security Operations Centre (LSOC) recorded record numbers of attacks compared to the same period last year. The report also found that between Q1 2021 and Q2 2021 there was a 19% increase in DDoS campaigns, some of which were over 100 Gbps in attack volume; further evidence that cyber criminals are continuing to exploit the vulnerabilities of businesses during the pandemic. The key findings from the report are: The number of attacks continued to rise: + 33% increase year-on-year compared to H1/2020. DDoS attacks are increasing: +19% in Q2 2021 compared to Q1 2021. Overall attack bandwidth remained high: 555 Gbps in maximum attack volume. Sharp increase in attack bandwidth: +37% increase in H1/2021 compared to H1/2020. Number of high-volume attacks > 100 Gbps in H1/2021: 28 Criminals targeted those organisations and institutions that were in high demand during the global pandemic, such as va ccination websites, e-learning platforms or portals and businesses IT infrastructure as well as hosting providers and internet service providers . LSOC also suggests that the use of extortion emails has reached critical levels . Employees have received malicious emails from a multitude of different senders including Fancy Bear, Lazarus Group and most recently Fancy Lazarus. Instead of being indiscriminate, ransom demands now vary depending on the size of the company and the industry of the victims. In fact, companies from a wide range of industries (including finance, e-commerce, media and logistics) are currently being affected. The frequency of these campaigns has increased, ransom demands have skyrocketed and LSOC is warning that they could continue well into Q3 2021. According to Link11’s security experts, the intensity and regularity of extortion emails has noticeably increased . The scale of DDoS activity far exceeds any from previous years and the number of businesses experiencing serious security breaches has risen sharply. The consequences of such an attack can be severe, from loss of revenue, costly business interruptions, long recovery times to sensitive data being compromised. Marc Wilczek, Managing Director of Link11, said: “In an increasingly connected world, the availability and integrity of IT systems are critical to any business. Our research for the first half of 2021 shows that companies are continuously exposed to DDoS attacks and that they are far more frequent and complex. Due to the increasingly sophisticated attack techniques being used by cyber criminals, many security tools are reaching their limits. This means that solutions which provide maximum precision and speed in detecting and mitigating the attacks are more in demand than ever before.” Although the threat level of DDoS attacks has remained high and security providers have provided persistent warnings, LSOC believes some companies are still lack the relevant security solutions to prevent an attack . In a number of cases, organisations have been found to be completely unprotected and operations have been brought to a standstill. The only way to limit the damage is to implement specialised protection solutions on an ad-hoc basis. From an economic and legal point of view, however, it makes more sense to focus on sustainable prevention rather than reaction. As threat levels continue to rise LSOC recommends businesses take this opportunity to conduct a thorough review of their cyber security posture. They are also warning if you fall victim to a DDoS attack do not respond to extortion attempts and call in a specialist for DDoS protection as soon as an attack has been detected. Source: https://www.link11.com/en/blog/threat-landscape/link11-report-discovers-record-number-of-ddos-attacks-in-first-half-of-2021/

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Link11 Discovers Record Number of DDoS Attacks in First Half of 2021

RangeAmp DDoS attacks can take down websites and CDN servers

A team of Chinese academics has found a new way to abuse HTTP packets to amplify web traffic and bring down websites and content delivery networks (CDNs). Named RangeAmp, this new Denial-of-Service (DoS) technique exploits incorrect implementations of the HTTP “Range Requests” attribute. HTTP Range Requests are part of the HTTP standard and allow clients (usually browsers) to request only a specific portion (range) of a file from a server. The feature was created for pausing and resuming traffic in controlled (pause/resume actions) or uncontrolled (network congestion or disconnections) situations. The HTTP Range Requests standard has been under discussion at the Internet Engineering Task Force (IETF) for more than half a decade, but, due to its usefulness, has already been implemented by browsers, servers, and CDNs. Two RangeAmp attacks discovered Now, a team of Chinese academics says that attackers can use malformed HTTP Range Requests to amplify how web servers and CDN systems react when having to deal with a range request operation. The team says two different RangeAmp attacks exist. The first is called a RangeAmp Small Byte Range (SBR) attack. In this case [see (a) in the image below], the attacker sends a malformed HTTP range request to the CDN provider, which amplifies the traffic towards the destination server, eventually crashing the targeted site. The second is called a RangeAmp Overlapping Byte Ranges (OBR) attack. In this case [see b) in the image below], the attacker sends a malformed HTTP range request to a CDN provider, and in the case, the traffic is funneled through other CDN servers, the traffic is amplified inside the CDN networks, crashing CDN servers and rendering both the CDNs and many other destination sites inaccessible. Image: Weizhong et al. Academics said they tested RangeAmp attacks against 13 CDN providers and found that all were vulnerable to the RangeAmp SBR attack, and six were also vulnerable to the OBR variant when used in certain combinations. Researchers said the attacks were very dangerous and required a minimum of resources to carry out. Of the two, RangeAmp SBR attacks could amplify traffic the most. The research team found that attackers could use a RangeAmp SBR attack to inflate traffic from 724 to 43,330 times the original traffic. Image: Weizhong et al. RangeAmp OBR attacks were a little harder to carry out, as the six vulnerable CDNs needed to be in specific (master-surrogate) configurations, but when conditions were met, reserchers said OBR attacks could also be used to inflate traffic inside a CDN network with amplification factors of up to nearly 7,500 times the initial packet size. Image: Weizhong et al. Of the two, OBR attacks were considered more dangerous, as attackers could take down entire chunks of a CDN provider’s network, bringing down connectivity for thousands of websites at a time. CDN vendors notified seven months ago Academics said that for the past few months they have been silently contacting the affected CDN providers and disclosing the details of the RangeAmp attack. Of the 13 CDN providers, researchers said that 12 responded positively and either rolled out or said they planned to roll out updates to their HTTP Range Request implementation. The list includes Akamai, Alibaba Cloud, Azure, Cloudflare, CloudFront, CDNsun, CDN77, Fastly, G-Core Labs, Huawei Cloud, KeyCDN, and Tencent Cloud. “Unfortunately, although we have sent them emails several times and have tried to reach out to their customer services, StackPath did not provide any feedback,” the research team said. “In general, we have tried our best to responsibly report the vulnerabilities and provide mitigation solutions. The related CDN vendors have had nearly seven months to implement mitigation techniques before this paper was published.” Each CDN provider’s reply, along with technical details about the RangeAmp attacks, are available in the research team’s paper, entitled “CDN Backfired: Amplification Attacks Based on HTTP Range Requests,” available for download in PDF format from here. Source: https://www.zdnet.com/article/rangeamp-attacks-can-take-down-websites-and-cdn-servers/

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RangeAmp DDoS attacks can take down websites and CDN servers

NXNSAttack technique can be abused for large-scale DDoS attacks

New vulnerability in DNS server software can be leveraged for DDoS attacks with an 1620x amplification factor. A team of academics from Israel has disclosed today details about NXNSAttack, a vulnerability in DNS servers that can be abused to launch DDoS attacks of massive proportions. According to the research team, NXNSAttack impacts recursive DNS servers and the process of DNS delegation. Recursive DNS servers are DNS systems that pass DNS queries upstream in order to be resolved and converted from a domain name into an IP address. These conversions take place on authoritative DNS servers, the servers that contain a copy of the DNS record, and are authorized to resolve it. However, as a safety mechanism part of the DNS protocol, authoritative DNS servers can also “delegate” this operation to alternative DNS servers of their choosing. New NXNSAttack explained In a research paper published today, academics from the Tel Aviv University and The Interdisciplinary Center in Herzliya, Israel, said they found a way to abuse this delegation process for DDoS attacks. The NXNSAttack technique has different facets and variations, but the basic steps are detailed below: 1) An attacker sends a DNS query to a recursive DNS server. The request is for a domain like “attacker.com,” which is managed through an attacker-controlled authoritative DNS server. 2) Since the recursive DNS server is not authorized to resolve this domain, it forwards the operation to the attacker’s malicious authoritative DNS server. 3) The malicious DNS server replies to the recursive DNS server with a message that equates to “I’m delegating this DNS resolving operation to this large list of name servers.” The list contains thousands of subdomains for a victim website. 4) The recursive DNS server forwards the DNS query to all the subdomains on the list, creating a surge in traffic for the victim’s authoritative DNS server. Image: NIC.CZ NXNSAttack has a huge amplification factor The research team says that an attacker using NXNSAttack can amplify a simple DNS query from 2 to 1,620 times its initial size, creating a massive spike in traffic that can crash a victim’s DNS server. Once the DNS server goes down, this also prevents users from accessing the attacked website, as the site’s domain can’t be resolved anymore. The research team says the NXNSAttack packet amplification factor (PAF) depends on the DNS software running on a recursive DNS server; however, in most cases, the amplification factor is many times larger than other DDoS amplification (reflection) attacks, where the PAF is usually between lowly values of 2 and 10. This large PAF implies that NXNSAttack is one of the most dangerous DDoS attack vectors known to date, having the ability to launch debilitating attacks with only a few devices and automated DNS queries. Patches available for DNS software The Israeli researchers said they’ve been working for the past few months with the makers of DNS software, content delivery networks, and managed DNS providers to apply mitigations to DNS servers across the world. Impacted software includes the likes of ISC BIND (CVE-2020-8616), NLnet labs Unbound (CVE-2020-12662), PowerDNS (CVE-2020-10995), and CZ.NIC Knot Resolver (CVE-2020-12667), but also commercial DNS services provided by companies like Cloudflare, Google, Amazon, Microsoft, Oracle (DYN), Verisign, IBM Quad9, and ICANN. Image: Shafir et al. Patches have been released today and over the previous weeks. They include mitigations that prevent attackers from abusing the DNS delegation process to flood other DNS servers. Server administrators who run their own DNS servers are advised to update DNS resolver software to the latest version. The research team’s work has been detailed in an academic paper entitled “ NXNSAttack: Recursive DNS Inefficiencies and Vulnerabilities ,” available for download in PDF format . Source: https://www.zdnet.com/article/nxnsattack-technique-can-be-abused-for-large-scale-ddos-attacks/

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NXNSAttack technique can be abused for large-scale DDoS attacks

Are you Ready for These 26 Different Types of DDoS Attacks?

The scourge of distributed denial-of-service (DDoS) attacks has been a major concern for businesses and governments for more than two decades. First reported in 1996, this is a destructive and ever-evolving vector of cyber raids that knocks electronic networks offline by flooding them with the traffic they can’t handle. Not only is DDoS a way for hacktivists to manifest protest against Internet censorship and controversial political initiatives, but it’s also a goldmine of opportunities for achieving strictly nefarious goals. For instance, the latest tweak in this epidemic is what’s called “ransom DDoS,” a technique used to extort money from organizations in exchange for discontinuing a massive incursion. A big hurdle to thwarting the DDoS phenomenon is that it’s heterogeneous and spans a variety of different tactics. To begin with, there are three overarching categories of these attacks that form the backbone of this ecosystem: Volume-based (volumetric) attacks are the “classic” ones that congest a target network’s bandwidth with a hefty amount of traffic packets. Protocol attacks are aimed at exhausting server or firewall resources. Application layer (layer 7 DDoS) attacks zero in on specific web applications rather than the whole network. These ones are particularly hard to prevent and mitigate while being relatively easy to orchestrate. Furthermore, there are dozens of sub-types that fall into either one of the above generic groups but exhibit unique characteristics. Here’s a complete breakdown of the present-day DDoS attack methods. 1. SYN Flood This attack exploits the TCP three-way handshake, a technique used to establish any connection between a client, a host, and a server using the TCP protocol. Normally, a client submits a SYN (synchronize) message to the server to request a connection. When a SYN Flood attack is underway, criminals send a plethora of these messages from a spoofed IP address. As a result, the receiving server becomes incapable of processing and storing so many SYN packets and denies service to real clients. 2. LAND attack To perform a Local Area Network Denial (LAND) attack, a threat actor sends a fabricated SYN message in which the source and destination IP addresses are the same. When the server tries to respond to this message, it gets into a loop by recurrently generating replies to itself. This leads to an error scenario, and the target host may eventually crash. 3. SYN-ACK Flood The logic of this attack vector is to abuse the TCP communication stage where the server generates a SYN-ACK packet to acknowledge the client’s request. To execute this onslaught, crooks inundate the CPU and RAM resources of the server with a bevy of rogue SYN-ACK packets. 4. ACK & PUSH ACK Flood Once the TCP three-way handshake has resulted in establishing a connection between a host and a client, ACK or PUSH ACK packets are sent back and forth until the session is terminated. A server targeted by this type of a DDoS attack cannot identify the origin of falsified packets and wastes all of its processing capacity trying to determine how to handle them. 5. Fragmented ACK Flood This attack is a knockoff of the above-mentioned ACK & PUSH ACK Flood technique. It boils down to deluging a target network with a comparatively small number of fragmented ACK packets that have a maximum allowed size, usually 1500 bytes each. Network equipment such as routers ends up running out of resources trying to reassemble these packets. Furthermore, fragmented packets can slip below the radar of intrusion prevention systems (IPS) and firewalls. 6. Spoofed Session Flood (Fake Session Attack) In order to circumvent network protection tools, cybercriminals may forge a TCP session more efficiently by submitting a bogus SYN packet, a series of ACK packets, and at least one RST (reset) or FIN (connection termination) packet. This tactic allows crooks to get around defenses that only keep tabs on incoming traffic rather than analyzing return traffic. 7. UDP Flood As the name suggests, this DDoS attack leverages multiple User Datagram Protocol (UDP) packets. For the record, UDP connections lack a handshaking mechanism (unlike TCP), and therefore the IP address verification options are very limited. When this exploitation is in full swing, the volume of dummy packets exceeds the target server’s maximum capacity for processing and responding to requests. 8. DNS Flood This one is a variant of UDP Flood that specifically homes in on DNS servers. The malefactor generates a slew of fake DNS request packets resembling legitimate ones that appear to originate from a huge number of different IP addresses. DNS Flood is one of the hardest denial-of-service raids to prevent and recover from. 9. VoIP Flood This is a common form of UDP Flood that targets a Voice over Internet Protocol (VoIP) server. The multitude of bogus VoIP requests sent from numerous IP addresses drain the victim server’s resources and knock it offline at the end of the day. 10. NTP Flood (NTP Amplification) Network Time Protocol (NTP), one of the oldest networking protocols tasked with clock synchronization between electronic systems, is at the core of another DDoS attack vector. The idea is to harness publicly-accessible NTP servers to overload a target network with a large number of UDP packets. 11. CHARGEN Flood Similarly to NTP, the Character Generator Protocol (CHARGEN) is an oldie whose emergence dates back to the 1980s. In spite of this, it is still being used on some connected devices such as printers and photocopiers. The attack comes down to sending tiny packets containing a victim server’s fabricated IP to devices with CHARGEN protocol enabled. In response, the Internet-facing devices submit UDP packets to the server, thus flooding it with redundant data. 12. SSDP Flood Malefactors can exploit networked devices running Universal Plug and Play (UPnP) services by executing a Simple Service Discovery Protocol (SSDP) reflection-based DDoS attack. On a side note, SSDP is embedded in the UPnP protocol framework. The attacker sends small UDP packets with a spoofed IP address of a target server to multiple devices running UPnP. As a result, the server is flooded with requests from these devices to the point where it goes offline. 13. SNMP Flood (SNMP Amplification) Tasked with harvesting and arranging data about connected devices, the Simple Network Management Protocol (SNMP) can become a pivot of another attack method. Cybercriminals bombard a target server, switch, or router with numerous small packets coming from a fabricated IP address. As more and more “listening” devices reply to that spoofed address, the network cannot cope with the immense quantity of these incoming responses. 14. HTTP Flood When executing an HTTP Flood DDoS attack, an adversary sends ostensibly legitimate GET or POST requests to a server or web application, siphoning off most or all of its resources. This technique often involves botnets consisting of “zombie” computers previously contaminated with malware. 15. Recursive HTTP GET Flood To perpetrate this attack, a malicious actor requests an array of web pages from a server, inspects the replies, and iteratively requests every website item to exhaust the server’s resources. The exploitation looks like a series of legitimate queries and can be difficult to identify. 16. ICMP Flood Also referred to as Ping Flood, this incursion aims to inundate a server or other network device with numerous spoofed Internet Control Message Protocol (ICMP) echo requests or pings. Having received a certain number of ICMP pings, the network responds with the same number of reply packets. Since this capability to respond is finite, the network reaches its performance threshold and becomes unresponsive. 17. Misused Application Attack Instead of using spoofed IP addresses, this attack parasitizes legitimate client computers running resource-intensive applications such as P2P tools. Crooks reroute the traffic from these clients to the victim server to bring it down due to excessive processing load. This DDoS technique is hard to prevent as the traffic originates on real machines previously compromised by the attackers. 18. IP Null Attack This one is carried out by sending a slew of packets containing invalid IPv4 headers that are supposed to carry transport layer protocol details. The trick is that threat actors set this header value to null. Some servers cannot process these corrupt-looking packets properly and waste their resources trying to work out how to handle them. 19. Smurf Attack This one involves a malware strain called Smurf to inundate a computer network with ICMP ping requests carrying a spoofed IP address of the target. The receiving devices are configured to reply to the IP in question, which may produce a flood of pings the server can’t process. 20. Fraggle Attack This DDoS technique follows a logic similar to the Smurf Attack, except that it deluges the intended victim with numerous UDP packets rather than ICMP echo requests. 21. Ping of Death Attack To set this raid in motion, cybercrooks poison a victim network with unconventional ping packets whose size significantly exceeds the maximum allowed value (64 bytes). This inconsistency causes the computer system to allocate too many resources for reassembling the rogue packets. In the aftermath of this, the system may encounter a buffer overflow or even crash. 22. Slowloris This attack stands out from the crowd because it requires very low bandwidth and can be fulfilled using just one computer. It works by initiating multiple concurrent connections to a web server and keeping them open for a long period of time. The attacker sends partial requests and complements them with HTTP headers once a while to make sure they don’t reach a completion stage. As a result, the server’s capability to maintain simultaneous connections is drained and it can no longer process connections from legitimate clients. 23. Low Orbit Ion Cannon (LOIC) Originally designed as a network stress testing tool, LOIC can be weaponized in real-world DDoS attacks. Coded in C#, this open-source software deluges a server with a large number of packets (UPD, TCP, or HTTP) in an attempt to disrupt a target’s operation. This onslaught is usually backed by a botnet consisting of thousands of machines and coordinated by a single user. 24. High Orbit Ion Cannon (HOIC) HOIC is a publicly accessible application that superseded the above-mentioned LOIC program and has a much bigger disruptive potential than its precursor. It can be used to submit a plethora of GET and HTTP POST requests to a server concurrently, which ends up knocking a target website offline. HOIC can affect up to 256 different domains at the same time. 25. ReDoS ReDoS stands for “regular expression denial-of-service.” Its goal is to overburden a program’s regular expression implementation with instances of highly complex string search patterns. A malicious actor can trigger a regular expression processing scenario whose algorithmic complexity causes the target system to waste superfluous resources and slow down or crash. 26. Zero-Day DDoS This term denotes an attack that takes advantage of uncatalogued vulnerabilities in a web server or computer network. Unfortunately, such flaws are surfacing off and on, making the prevention a more challenging task. A Serious Threat Although distributed denial-of-service is an old school attack vector, it continues to be a serious threat to organizations. The monthly number of such attacks exceeds 400,000. To top it off, cybercriminals keep adding new DDoS mechanisms to their repertoire and security providers aren’t always prepared to tackle them. Another unnerving thing is that some techniques, including Low and High Orbit Ion Cannon, are open source and can be leveraged by wannabe criminals who lack tech skills. Such an attack may get out of hand and go way beyond the intended damage. To prevent DDoS attacks and minimize the impact, businesses should learn to proactively identify the red flags; have an appropriate response plan in place; make sure their security posture has no single point of failure, and continuously work on strengthening the network architecture. Source: https://www.securitymagazine.com/articles/92327-are-you-ready-for-these-26-different-types-of-ddos-attacks

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Are you Ready for These 26 Different Types of DDoS Attacks?

DDoS in the Time of COVID-19: Attacks and Raids

There is no escaping it. COVID-19 is dominating headlines and has impacted virtually every corner of the world. Like most people at this point, I’m 30 days into isolation and trying everything in my power to ignore the elephant in the room and the politics that go along with it. Unfortunately, or fortunately, cyber security is an essential business. As a result, those working in the field are not getting to experience any downtime during a quarantine. Many of us have been working around the clock, fighting off waves of attacks and helping other essential businesses adjust to a remote work force as the global environments change. Waves of Attacks Along the way we have learned a few things about how a modern society deals with a pandemic. Obviously, a global Shelter-in-Place resulted in an unanticipated surge in traffic. As lockdowns began in China and worked their way west, we began to see massive spikes in streaming and gaming services. These unanticipated surges in traffic required digital content providers to throttle or downgrade streaming services across Europe, to prevent networks from overloading. The COVID-19 pandemic also highlights the importance of service availability during a global crisis. Due to the forced digitalization of the work force and a global Shelter-in-Place, the world became heavily dependent on a number of digital services during isolation. Degradation or an outage impacting these services during the pandemic could quickly spark speculation and/or panic. For example, as COVID-19 began to take a toll on Australia’s economy, there became a rush of suddenly unemployed citizens needing to register for welfare services on MyGov, Australia’s government service portal. This natural spike in traffic ended up causing an outage on the morning of March 23 rd , requiring Government Services Minister Stuart Roberts to walk back his initial claims that the portal had suffered from a DDoS attack, naturally causing panic and speculation among those desperately seeking government assistance. In France, Assistance Publique – Hôpitaux de Paris, the university hospital trust managing 39 public hospitals in the area, found itself a victim of a DDoS attack on March 22 nd , just as France begin to deal with a surge in COVID-19 related cases. The attack was reported to have only lasted an hour and did not cause any significant damage. The problem was, upon further review, in order to deal with the attack, there was a reduction in internet access. Typically, during any other day, this reduction would not have had an impact, but due to the pandemic and a remote, non-essential work force, employees outside of the hospital’s network were blocked from external access during this attack, resulting in the inability to access email, Skype or remote application. In addition to this attack, the Brno University Hospital in the Czech Republic was hit a week earlier with a cyber-attack that force the hospital to shut down their entire network, resulting in the cancellation of surgeries. And if that wasn’t enough, a food delivery service in Germany experienced a DDoS attack from an extortionist. Lieferando.de, also known as takeaway.com, is a takeaway food service that delivers from more than 15,000 restaurants in Germany. During this global pandemic, citizens of the world have become very dependent on take away food services as part of the effort to help flatten the curve. Unfortunately, an extortionist attempted to capitalize on this by launching a Ransom Denial of Service (RDoS) attack on Takeaway, demanding 2 BTC ($11,000) to stop the attack. As a result, some orders were able to be accepted but were never delivered, forcing Germans to find another option for the night. Taking Down Cyber Criminals It should come as no surprise that law enforcement agencies around the world are particularly interested in taking down those looking to profit from COVID-19. They are also interested in kicking down doors of those who are conducting DDoS attacks during the pandemic. On April 10 th , a 19-year-old from Breda, Netherlands, was arrested for conducting a DDoS attack on March 19 th against MijnOverheid.nl and Overhied.nl. Both of these websites are government-related and were providing Dutch citizens with important government information related to the pandemic. It’s truly unfortunate to see teenagers in the middle of a pandemic targeting critical infrastructure, preventing access to emergency regulations and advisories, but what did we expected? A cease-fire? In order to prevent additional DDoS attacks, a week prior to the Breda arrest, Dutch police shut down 15 stresser services. While these services were not listed, I can tell you, the raid was largely unnoticeable. Part of the problem can be found between the words of Jeroen Niessen, Dutch Police: “With preventive actions, we want to protect people as much as possible against DDoS attacks. By taking booters and their domain names offline, we make it difficult for cyber criminals. We have now put quite a few on black. If they pop up elsewhere, we will immediately work on it again. Our goal is to seize more and more booters…” If they pop up elsewhere, we will immediately work on it again…. But Are These Efforts Futile? In my opinion, it sounds like the police finally understand that raids are a losing battle without total commitment. If there’s one thing we learned from the 2019 raid of KV solution, a bulletproof hosting provider, it was that when one criminal falls, dozens are willing to replace them. For example, in 2018 the Department of Justice took down 15 stresser services as part of an effort to prevent DDoS attacks. The domain seized are listed below: anonsecurityteam.com booter.ninja bullstresser.net critical-boot.com defcon.pro defianceprotocol.com downthem.org layer7-stresser.xyz netstress.org quantumstress.net ragebooter.com request.rip str3ssed.me torsecurityteam.org vbooter.org The problem is, taking down a stresser service is pointless when there are so many criminals using public services and corporations to mask their identities. Until there is cooperation and commitment to removing the DDoS threat completely, it will always linger, rearing its nasty head in the worst moments. Due to the lack of commitment between the global law enforcement community and the security community, we are unable to see a meaningful impact in the DDoS landscape. It’s really not that difficult to find a stresser service today. In fact, you can find these criminals openly advertising their services on major search engines–no Tor browser or Darknet Market required. While search engines could simply de-index these services, they choose not to. Instead, they elect to profit from your misfortune. Below are a handful of sites found on popular search engine using the terms ‘booter’ or ‘stresser’: powerstresser.pro, freeboot.to, instant-stresser.to, meteor-security.to, layer7-security.to, stressthem.to, stress.to, stress.gg, booter.vip, bootstresser.com, bootyou.net, defconpro.net, str3ssed.co, ts3booter.net, vdos-s.co, webstresser.biz, hardstresser.com, havoc-security.pw, synstresser.to, dosninja.com, stresser.wtf, thunderstresser.me, ripstresser.rip, astrostress.com, botstress.to, dotn3t.org, nightmarestresser.to, silentstress.wtf, torstress.com, xyzbooter.net, databooter.to. A Temporary Solution After reviewing the list, Officer Jeroen Niessen’s statement becomes clearer. Whether or not these current websites are associated with the original criminal groups or cloned, multiple stressers with notorious names have been reappearing. In general, I think it’s fair to say that while raids are disrupting criminals, they have hardly put a dent in the overall activity or economy of the DDoS-as-a-Service industry. Takedowns only represent a temporary solution, and this has become clear during the pandemic. Unfortunately, the threat landscape continues to evolve during a pandemic. Criminals are clearly not taking time off. Worst of all, not only is the public cloud fully in scope for cybercriminals looking to compromise enterprise equipment, but due to the ongoing pandemic and the remote digitalization of the work force, remote software and digital services have come under fire from opportunist criminals. I think during this time of chaos and uncertainty we really need to reflect on our impact and ability to secure the digital workforce and ask ourselves, are we protecting criminals due to privacy concerns or is there more we could do to remove and eliminate the DDoS threat? Source: https://securityboulevard.com/2020/04/ddos-in-the-time-of-covid-19-attacks-and-raids/

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DDoS in the Time of COVID-19: Attacks and Raids

Cyber Warfare Doesn’t Take a Break During Coronavirus Season

US Health Agencies Are Fending off DDoS Attacks and Disinformation Campaigns in the Midst of a Pandemic Unfettered by social distancing measures or economic concerns, cyber threat actors are taking full advantage of opportunities created by the coronavirus pandemic. United States health agencies are being tested by distributed denial of service (DDoS) attacks and social media disinformation campaigns as they scramble to respond to an unprecedented viral outbreak, and these attacks are thought to be backed by a hostile foreign government. Federal health agency hit with DDoS attack A large-scale DDoS attack was directed at the U.S. Health and Human Services Department sometime around March 15. A spokesperson for the National Security Council stated that the attack did not do any substantial damage and that the networks are being “continuously monitored” to mitigate any future attempts. The DDoS attack involved millions of requests on the health agency’s servers over a period of several hours. A Health and Human Services spokesperson indicated that the government does not know who was behind the attack, but suspects a foreign government. The DDoS attack did not involve any network compromise, nor did it significantly slow down operations. The spokesperson indicated that the agency has put unspecified “extra protections” in place going forward. Fake texts and tweets part of organized disinformation campaign In addition to the DDoS attack, the National Security Council indicated that there is an ongoing disinformation campaign intended to sow fear and confusion in the American public that focuses on the health agencies. This is also believed to be backed by a foreign government. The agency warns about fake text messages that claim a mandatory national quarantine or lockdown is imminent. This disinformation campaign is also circulating widely on social media platforms such as Twitter and Facebook, and usually involves someone claiming they heard about imminent National Guard mobilization for a lockdown from some sort of friend or family member with inside information. The most damaging aspect of the disinformation campaign was a hack that managed to penetrate emergency MMS and SMS text-messaging systems used in a number of different cities in the US, which occurred just after Italy opted to lock down the entire country. The attackers sent out a bogus “warning” message claiming that public and emergency services were about to be shut down due to the coronavirus. These messages did not initially get out to the general public on a large scale, but did make their way to various emergency services personnel in a number of major cities including Boston, Washington DC and New York City. There is no indication at present that a national quarantine or lockdown is being considered. Such a move would be logistically difficult and extremely unpopular politically. While President Trump has mentioned that the possibility has been discussed, he has also signaled a desire to avoid action of this sort by the federal government on several occasions. During his March 21 briefing, Trump indicated that the government is focusing on action in coronavirus “hot zones” and that a national shutdown was not being seriously considered at the time. Perpetrators, motives and methods The assumption that a foreign government is behind these cyber incidents is primarily based on the lack of any sort of profit motive behind shutting down health agency servers or spreading false rumors on social media. While the rumors could potentially be used to manipulate stock prices in an indirect way, it seems more likely that this is a coordinated effort given that the DDoS attack and the disinformation campaign emerged at about the same time. Anonymous officials told ABC News that they believe Russia or China are the most likely perpetrators. This would not at all be a surprising move by either of these American adversaries, but particularly not for Russia. Russian “troll farms” that use fake social media accounts to pose as Americans and stir up dissent and division have been making the news since the widespread interference in the 2016 election, but have likely been working for over a decade now. This sort of disinformation campaign is precisely their MO. Any state-sponsored threat actor is capable of using a botnet, but DDoS attacks against other countries have been the hallmark of two particular hacking groups in recent years: APT 28, aka Russia’s infamous “Fancy Bear” group, and APT 33 (Elfin Team) out of Iran. Greg Wendt, Executive Director of Appsian, points out that though these health agencies have been successfully able to mitigate DDoS attacks they may be ripe for more targeted and sophisticated breach attempts: ” … government institutions such as the HHS are key targets for cyberattacks, and given that the government has many applications and systems that were written and developed 35-40 years ago, the process to modernize and transform the critical nature of data is a lengthy one and not a process that can be successfully done overnight.” New challenges for both government and private industry The cyber challenges posed by the coronavirus outbreak are not limited to health agencies. Private industry and individuals can also expect online predators to attempt to take advantage of the situation. Thomas Hatch, CTO and Co-Founder at SaltStack, a Lehi, Utah-based provider of intelligent IT automation software, foresees an inevitable increase in attacks on certain business sectors: “Petty thieves will assume that classical attacks are going to be more effective because cyber defense staffing is likely distracted right now dealing with the influx of issues that come from a demand shift for specific services. Organized groups are likely empowered by the situation and will want to take advantage of it. They can attack specific services, particularly financial institutions because of the overall distracted nature of the defenders.” Leading security firm Crowdstrike is reporting a significant increase in activity in phishing campaigns concurrent with global implementation of coronavirus restrictions. Early examples that have been spotted in the wild have promised free vaccines or offers of charity relief. Some targeted attacks on health care organizations have claimed to be related to shipments of ventilators or personal protective equipment. Hackers are also commonly attempting to pose as a legitimate health agency such as the WHO or CDC. In addition to targeted cyber attacks, everyone should be on heightened alert for messages tied to disinformation campaigns being spread throughout all sorts of public forums online. Source: https://www.cpomagazine.com/cyber-security/cyber-warfare-doesnt-take-a-break-during-coronavirus-season-us-health-agencies-are-fending-off-ddos-attacks-and-disinformation-campaigns-in-the-midst-of-a-pandemic/

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Cyber Warfare Doesn’t Take a Break During Coronavirus Season

Ireland vulnerable to cybersecurity attack, says industry leader

The Government has been urged to appoint a cybersecurity “tsar” to ensure the State is adequately prepared to deal with potential attacks. The call by one of the State’s leading IT security experts comes amid growing concern Ireland could be caught off-guard by a cybersecurity attack, due to a lack of joined-up thinking on the issue and a failure to take threats seriously. Currently the response to cyber threats lies across a number of bodies, with the Department of Communications, An Garda Síochána, the Defence Forces and the Department of Defence among those involved. Brian Honan, an independent security consultant who has also served as a special adviser to Europol’s Cybercrime Centre (EC3), said a tsar with the authority and autonomy to ensure an effective cybersecurity strategy should be appointed as a matter of urgency. “We need a coherent and centralised approach to protecting our nation rather than having responsibilities for various aspects of cybersecurity spread throughout different departments and agencies,” he said. Mr Honan warned that cybersecurity was becoming more of an issue globally with data breaches, DDoS and ransomware attacks, financial scams and state-sponsored hacking incidents all on the rise. As well as domestic considerations, the State is also responsible for the security of services provided across the EU by multinational companies who have their European headquarters located here. Mr Honan said that, given this, a cybersecurity attack could not only cause widespread disruption for businesses and public agencies, but would also lead to serious reputational damage. “It is too critical for us as a nation, both from an economic and national security point of view, for [cybersecurity] to be left to individual government departments or businesses to look after,” said Mr Honan. Funding review Mr Honan’s comments come just weeks after a report by the Comptroller and Auditor General revealed that a dedicated cybersecurity unit established to protect government and industry networks has no strategic plan and requires a review of its funding. The National Cyber Security Centre (NCSC), based in UCD, was established in 2011 with a view to “securing critical national infrastructure”. However, the C&AG report into its operations found an oversight body set up to monitor its performance had not met since 2015. Fianna Fáil has also recently urged the Government to take a more proactive approach to cybersecurity. Its defence spokesman, Jack Chambers, recently called for responsibility for the NCSC to be reassigned away from the Department of Communications. “The Department of Defence should take ownership and control of this so it can develop a proper whole-of-government response to the area of cybersecurity as it becomes a serious national threat. It would compromise foreign direct investment if our national infrastructure were to be seriously undermined and there were to be an attack,” Mr Chambers. Source: https://www.irishtimes.com/business/technology/ireland-vulnerable-to-cybersecurity-attack-says-industry-leader-1.3666946

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Ireland vulnerable to cybersecurity attack, says industry leader

DDoS Attack Pulls Down Bitcoin Gold Website

Ever since the initiation of the hard-fork resulting into a new cryptocurrency – Bitcoin Gold (BTG) – from the bitcoin blockchain, the BTG website has been constantly under DDoS attacks and has not resumed operations ever since. Earlier in the day, a new hard fork in the Bitcoin blockchain network gave rise to a new cryptocurrency Bitcoin Gold (BTG) and ever since then the official website has been constantly under DDoS attacks. This new hard-fork which resulted into a derivative cryptocurrency of the popular Bitcoin, has been aimed for establishing a fair platform different from the Bitcoin network which is alleged to have been dominated by large companies. The existing bitcoin mining process requires high-end powerful computing hardware which is quite a lot expensive and certainly not affordable to ordinary miners. As a result the mining process is said to have got centralised into the hands of large companies. With Bitcoin Gold, the miners aim to democratise the mining process by bringing Bitcoin’s inherent value proposition of having a decentralised mode of operation. The first step of the Bitcoin Gold initiation was to take a “snapshot” of the bitcoin blockchain while creating a replica with new set of rules. Moreover, the BTG technical team has decided to release the cryptocurrency absolutely free for all those who are holding bitcoins at the time of fork. Soon after the process was initiated the BTG developer team had started reporting issues pertaining to DDoS attacks on the website. And even hours after the initiation process the attacks seem to have stopped nowhere denying enthusiasts to keep any track of the newly generated BTG cryptocurrency. Adding to the woes, the additional fact is that the new blockchain hasn’t turned public yet and the explorer and tracking tools have not been released yet. Owing to the controversial and divisive nature of cryptocurrency projects such as the Bitcoin Gold, the denial-of-service attacks have been a common phenomenon in occurrence. Jack Liao, LightningAsic CEO, who is said to be the brain behind the BTG’s creation has been quite vocal and critical about the existing mining process of Bitcoins targeting several companies which are profiting from the mining process. His open criticism could possibly be a reason for such attacks. However, in addition to this, there are other reasons attributed to the cause of criticism for Bitcoin Gold. Few developer channels are quite skeptical about BTG using a process in which the BTG will be privately created before being publicly available as an open-source project. Another cause of concern with the Bitcoin Gold is that it has not solved the risk of a “replay attack” which could possibly increase transaction complications when two completely incompatible version of the bitcoin blockchain will be unable to distinguish from each other. At the press time Bitcoin Gold (BTG) is trading at $262, according to the CoinMarketCap Index. The price of Bitcoin (BTC) took a slight hit after the hard fork, losing more than $300 of its all-time max value of $6,000 per-coin. The Bitcoin Gold is still in the development process and we have yet to hear any official from its developer technical team regarding the future plans and its modus operandi. Source: https://www.coinspeaker.com/2017/10/24/ddos-attack-pulls-bitcoin-gold-website/

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DDoS Attack Pulls Down Bitcoin Gold Website

Czech Parliamentary Election Websites Hit by Cyberattacks

The Czech statistical office has reported DDoS (Distrubuted Denial of Service) attacks on websites related to the recent parliamentary elections during the vote count. A number of websites of the Czech statistical office (CZSO) have been subject to cyberattacks during the counting of votes in the Czech parliament’s lower house election, Petra Bacova, the CZSO spokeswoman, told Sputnik Sunday. “The websites related to the parliamentary elections — volby.cz and volbyhned.cz — have temporary failed to function due to DDoS attacks [Distributed Denial of Service] during the vote count on Saturday. These attacks have not affected the overall progress of the election,” Bacova said. The police along with the Czech National Cyber and Information Security Agency have already launched an investigation into the attacks. “Thanks to the rapid response, the attacks on the both aforementioned servers have been neutralized, while the work of the websites has been resumed,” Bacova said. The Czech Republic held an election to the lower house of the parliament on Friday-Saturday. The centrist ANO political party won the election, receiving 29.64 percent of votes. Czech President Milos Zeman stated that he was ready to appoint Andrej Babis, ANO’s leader, as Czech prime minister. Source: https://sputniknews.com/europe/201710231058456317-czech-election-hit-cyberattack/

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Czech Parliamentary Election Websites Hit by Cyberattacks

New Mirai-Like Malware Targets IoT Devices

Security researchers are warning about malware that’s been enslaving routers, webcams and DVRs across the world to create a giant botnet capable of disrupting the internet. The malware, called Reaper or IoTroop, isn’t the first to target poorly secured devices. But it’s doing so at an alarmingly fast rate, according to security firm Check Point, which noticed the malicious code last month. The malware has infected “hundreds of thousands” of devices, said Maya Horowitz, threat intelligence group manager at Check Point. Reaper brings up memories of malware known as Mirai, which formed its own giant botnet in 2016 and infected over 500,000 IoT devices, according to some estimates. It then began launching a massive distributed denial-of-service (DDoS) attack that disrupted internet access across the US. Reaper could be used to launch a similar attack, Check Point researchers said. The good news is the infected bots haven’t launched any DDoS campaigns. Instead, they’re still focused on enslaving new devices. Researchers at security firm Qihoo 360 also noticed the Reaper malware, and found evidence it was trying to infect at least 2 million vulnerable devices. Reaper even borrows some source code from Mirai, though it spreads itself differently, Qihoo said. Unlike Mirai, which relies on cracking the default password to gain access to the device, Reaper has been found targeting around a dozen different vulnerabilities found in products from D-Link, Netgear, Linksys, and others. All these vulnerabilities are publicly known, and at least some of the vendors have released security patches to fix them. But that hasn’t stopped the mysterious developer behind Reaper from exploiting the vulnerabilities. In many cases, IoT devices will remain unpatched because the security fixes aren’t easy to install. Who may have created the malware and what their motives are still isn’t known, but all the tools needed to make it are actually available online, Horowitz said. For instance, the source code to the Mirai malware was dumped on a hacking forum last year. In addition, data about the vulnerabilities Reaper targets can be found in security research posted online. “It’s so easy to be a threat actor when all these public exploits and malware can be just posted on GitHub,” she said. “It’s really easy to just rip the code, and combine, to create your own strong cyber weapon.” Unfortunately, little might be done to stop the Reaper malware. Security experts have all been warning that poorly secured IoT devices need to be patched, but clearly many haven’t. “This is another wakeup call” for manufacturers, Horowitz said. Source: https://www.pcmag.com/news/356926/new-mirai-like-malware-targets-iot-devices

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New Mirai-Like Malware Targets IoT Devices