Tag Archives: defend against ddos

Anonymous Legion claims attack on Minnesota courts website

The international activist hacker group Anonymous Legion is claiming responsibility for an attack on the Minnesota Judicial Branch’s website that rendered it unusable for most of Wednesday. State officials became aware of the “distributed denial-of-service” (DDoS) attack about 8 a.m. Wednesday, around the same time Anonymous Legion e-mailed the Star Tribune. “Servers have also been penetrated and data has been secured, contrary to what they will tell you,” said Anonymous Legion’s e-mail. “This will occur frequently.” The group said the act was executed “collectively, through a global attack.” It is known for DDOS attacks on government websites, among others. The attack is similar to ones that interrupted the site last December. Last year’s attacks were traced to Asia and Canada. The state did not say Wednesday whether the attacks may be linked. “We are in the process of communicating with the FBI Cyber Task Force about this incident,” Beau Berentson, a spokesman for the state court administration office, said in a written statement. The website (www.mncourts.gov), visited by thousands every day looking to access court resources and information, was taken offline as the attack was investigated. Access to the site was restored around 5:15 p.m. “We have no evidence that any secure data has been inappropriately accessed,” Berentson said. Other online resources linked through the website are still functioning, including eFiling and eService, the Court Payment Center and remote access to district and appellate court records. The website was down for several hours from Dec. 21 to 31 in the previous attacks. “In a DDOS attack, an outside entity attempts to overwhelm an online resource with so much network traffic that it is no longer accessible to legitimate users,” State Court Administrator Jeff Shorba said in a January statement about last year’s attacks. “During these attacks, the Minnesota Judicial Branch did not experience any form of data breach or inappropriate access to court records, nor is there any evidence to suggest that the attackers attempted to gain access to Judicial Branch records or information.” Those attacks were reported to the federal government and Canadian authorities. “DDoS attacks are becoming increasingly common against high-profile websites in both the public and private sectors,” Shorba said in January. “While we cannot prevent these attacks from being launched, the Minnesota Judicial Branch is now better prepared to respond to these types of attacks in the future.” Source: http://www.startribune.com/minnesota-courts-website-attacked-again-by-hackers/384003231/

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Anonymous Legion claims attack on Minnesota courts website

Overwatch Servers Went Down After Alleged DDoS Attack

Infamous hacker group Lizard Squad is thought to be at it again, this time taking down Overwatch servers and leaving players unable to join and remain in a session. Over the past week, Blizzard has been experiencing some problems with Battle.net that have made it difficult for players to use the service as intended with games like Overwatch . Now, there’s word that these issues might have been caused by a DDoS attack launched by members of hacker group Lizard Squad. Some users are reporting that they are unable to log in to Battle.net. Others are able to enter, but find themselves kicked out of multiplayer matches in Overwatch for seemingly no reason. Ordinarily, issues like these would be brushed off as being part and parcel of the modern online experience. However, a suspicious tweet from a known Lizard Squad member has led to the group being implicated, according to a report from VG247. The above tweet is being taken as proof that Lizard Squad member AppleJ4ck was involved with the attack. Some Overwatch players responded to his post to vent their annoyance about the situation — to which AppleJ4ck responded, “in a way, I’m doing y’all a favor.” This is not the first time that Lizard Squad has targeted organizations within the video game industry. The group rose to prominence back in 2014, when a coordinated attack brought down the PlayStation Network and Xbox Live over Christmas, causing massive headaches for the companies involved. Of course, the attack was not an unmitigated success for the group, as the high-profile hack made Lizard Squad an immediate target for authorities. Just days later, a 22-year-old alleged to be a part of the organization was the subject of a raid by police in the United Kingdom. However, the strength of a group like Lizard Squad is the fact that they are spread all over the world. Individual members can be found and brought to justice, but it’s difficult to make a concerted attempt to stamp out its activity outright. If the situation is hard on the authorities, then it’s even more challenging for a company like Blizzard. The overwhelming popularity of Overwatch means its hard enough for the company to keep Battle.net afloat at the best of team, never mind when there are hackers on the prowl. Unfortunately, criminal elements like Lizard Squad are part and parcel of the modern online experience. Companies like Blizzard have to take these groups into consideration when operating a service like Battle.net — hackers have the power to ruin the experience for the rest of us, and the only defence is a robust level of security. Source: http://gamerant.com/overwatch-servers-down-ddos-attack-846/

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Overwatch Servers Went Down After Alleged DDoS Attack

DDoS defenses have been backsliding but starting a turnaround

Distributed denial-of-service attacks have been getting bigger and lasting longer, and for the past few years defenses haven’t kept pace, but that seems to be changing, Gartner analysts explained at the firm’s Security and Risk Management Summit. Gartner tracks the progress of new technologies as they pass through five stages from the trigger that gets them started to the final stage where they mature and are productive. The continuum is known as the Hype Cycle. DDoS defense had reached the so-called Plateau of Productivity – the final stage – in 2012, but then has moved backwards in the Hype Cycle in the past few years into the previous stage – the Slope of Enlightenment – says Gartner analyst Lawrence Orans. That fall, DDoS attacks were 10 times as large as any then seen hit Bank of America, JPMorgan Chase, Wells Fargo, U.S. Bank and PNC Bank using botnets of compromised servers to generate high volumes of traffic against not only HTTP and HTTPS but DNS as well. They also went after protocols including TCP, UDP, and ICMP. That was followed up in 2013 by the use of NTP amplification attacks that used Network Time Protocol servers to swamp networks with responses to requests made from spoofed IP addresses in the target network. “That set DDoS back on its heels,” Orans says. But security vendors and service providers that offer DDoS protection have caught up, and Gartner’s Hype Cycle rating for DDoS defenses will shift again back toward the maturity end of the scale, he says. That’s encouraging because the number of DDoS attacks from the first quarter of 2015 to the first quarter of 2016 more than doubled, according to Akamai’s latest State of the Internet Security report, and mega attacks hit hundreds of gigabits per second. Attacks of 300Gbps and above can be handled by leading DDoS vendors, Orans says, and given the ready availability of DDoS attack kits, it’s important for corporations to pay for this type of protection. Competition among DDoS mitigation providers is increasing, so prices have dropped, he says. Flat fees per month were the norm for DDoS protection services, but now there are more flexible plans. Protection can come in three models. Providers sell access to scrubbing centers, where traffic during a DDoS attack is redirected to a provider’s network where the attack traffic is dropped and only good traffic returned to the customer network. This can cost $5,000 per month and up. Some providers he mentioned: Akamai, Arbor, F5, Neustar, Nexusguard, Radware and Verisign. Some ISPs offer this type of service at a 15% to 20% premium over bandwidth costs, he says. Some ISPs are better at it than others, so customers should check them carefully, particularly newer and regional ones. Many businesses have multiple ISPs, so they should do the math to see if it makes sense to use this option, he says. Some ISPs he mentions: AT&T, CenturyLink, Level 3 and Verizon. Content-delivery networks can also help mitigate DDoS attacks, he says, by virtue of their architecture. CDNs distribute customer Web content around the world so it’s as close as possible to end users. That distribution makes it harder for attackers to find the right servers to hit and diffuses their capabilities. This option isn’t for everyone, he says. It’s not as effective as the others and it doesn’t make sense unless a business needs a CDN anyway to boost its response time. Web application firewalls can help mitigate those DDoS attacks that seek to disrupt use of Web applications. They can be deployed on premises with gear owned by the customer, but internet-hosted and cloud-based WAF services are emerging, Orans says. Cloud-based WAF is fastest growing for mobile devices that must be deployed quickly, he says. Source: http://www.networkworld.com/article/3083797/security/gartner-ddos-defenses-have-been-backsliding-but-starting-a-turnaround.html

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DDoS defenses have been backsliding but starting a turnaround

Anonymous take down South African State Broadcasting Corp Website Over News Censorship

Anonymous DDoS South African State Broadcasting Corporation Website, SABC says Anonymous hackers are cowards The online hacktivist group, Anonymous have taken offence at the news censorship in South Africa. An Anonymous affiliated group yesterday brought down the SABC website to protest against the rising censorship in South Africa. The South African Broadcasting Corporation (SABC), which is the official state-sponsored broadcaster of Africa has confirmed that its websites were hacked on Sunday. A Twitter account belonging to a hacktivist group dubbed Anonymous Africa claimed responsibility for the downtime of the SABC websites. The hacker targeted the DDoS attacks at the websites for SABC’s main TV channel, but also the 5FM and SAFM radio stations. The attacks begun at noon on Sunday and stopped four hours later after bringing down all Web-related services. The hacker announced its intentions to carry out the attacks on Twitter, on the night between Saturday and Sunday, about nine hours before they started. Anonymous Africa in a series of tweets on Sunday, said it was carrying out the alleged attack in light of allegations of censorship at the SABC. SABC chief operating officer Hlaudi Motsoeneng has blocked the broadcaster from showing burning of public property in a move to discourage vandalism while he has further driven a controversial ‘good news’ policy. The censorship charges arised after anti-government protests in South Africa that turned violent. It’s after these protests that SABC took its decision, and also urged private TV stations to stand in solidarity. In statements to South African tech news site Fin24, an SABC representative called the attackers “cowards” for attacking a “national key-point.” In the meantime, Anonymous Africa, which claims links to global hacktivist group Anonymous has promised more cyberattacks against the SABC. “We will stop the attacks at SABC (for now) at 4pm. We are not done yet, lots of action coming. Things are going to get wild!” tweeted the group on Sunday. Source: http://www.techworm.net/2016/06/anonymous-take-south-african-state-broadcasting-corp-website-news-censorship.html

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Anonymous take down South African State Broadcasting Corp Website Over News Censorship

Flaw in Juniper’s JunOS router software could cause DDoS flood

Juniper has disclosed that that a problem with the Junos router could enable DDoS attacks Juniper has admitted that a vulnerability in IPv6 processing on its Junos router OS could allow malicious packets to be sent to networks resulting in a DDoS attack on infrastructure. In an advisory, the firm said the flaw could enable a specially crafted “IPv6 Neighbor Discovery” (ND) packet to be accepted by the router rather than discarded. “The crafted packet, destined to the router, will then be processed by the routing engine (RE). A malicious network-based packet flood, sourced from beyond the local broadcast domain, can cause the RE CPU to spike, or cause the DDoS protection ARP protocol group policer to engage. When this happens, the DDoS policer may start dropping legitimate IPv6 neighbors as legitimate ND times out,” the firm said. The firm added that this is similar to the router’s response to any purposeful malicious IPv6 ND flood destined to the router. “The difference is that the crafted packet identified in the vulnerability is such that the forwarding controllers/ASICs should disallow this traffic from reaching the RE for further processing,” according to the advisory. It said that following investigations, only its MX, PTX, and QFX products have been confirmed to experience this behaviour. Juniper added that no fix was presently available at the time of writing and neither was a complete workaround. “Security best current practices (BCPs) of filtering all ND traffic at the edge, destined to network infrastructure equipment, should be employed to limit the malicious attack surface of the vulnerability,” the firm advised. Rich Barger, chief intelligence officer at ThreatConnect, told SCMagazineUK.com that organisations should look to either filter the protocol or packet (if possible). “It looks as if Juniper has included edge firewall rules that can block the neighbour discovery packets as a means to buffer any vulnerable devices,” he said. Richard Cassidy, technical director EMEA at Alert Logic, said that this flaw represents a serious issue for organisations that “Dual Stack” networking with IPv6 and IPv4. He told SC that the issue was “essentially a DDoS attack, through a specially crafted IPv6 ND packet, that can be targeted at JunOS routers from remote attackers. It is fairly simple to identify router OS versions through scanning techniques, which of course leaves most organisations at risk at some level, given the prevalence of Juniper in networking infrastructures globally.” Alex Cruz Farmer, VP of cloud at Nsfocus, told SC that almost every network around the world is considering or planning IPv6 if they have not already. “With this in mind, it’s crucial that the protection is implemented now, to avoid this security hole being exploited in future.” Source: http://www.scmagazineuk.com/flaw-in-junipers-junos-router-software-could-cause-ddos-flood/article/501681/

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Flaw in Juniper’s JunOS router software could cause DDoS flood

Massive DDoS attacks reach record levels as botnets make them cheaper to launch

Nineteen attacks that exceeded 100Gbps were recorded during the first three months of 2016 There were 19 distributed denial-of-service (DDoS) attacks that exceeded 100 Gbps during the first three months of the year, almost four times more than in the previous quarter. Even more concerning is that these mega attacks, which few companies can withstand on their own, were launched using so-called booter or stresser botnets that are common and cheap to rent. This means that more criminals can now afford to launch such crippling attacks. “In the past, very few attacks generated with booter/stresser tools exceeded the 100 Gbps mark,” researchers from Akamai said in the company’s State of the Internet security report for the first quarter of 2016 that was released Tuesday. By comparison, only five DDoS attacks over 100 Gbps were recorded during the fourth quarter of 2015 and eight in the third quarter. Nineteen such attacks in a single quarter is a new high, with the previous record, 17, set in the third quarter of 2014. But high bandwidth is not the only aspect of DDoS attacks that can cause problems for defenders. Even lower-bandwidth attacks can be dangerous if they have a high packet rate. A large number of packets per second poses a threat to routers because they dedicate RAM to process every single packet, regardless of its size. If a router serves multiple clients in addition to the target and exhausts its resources, that can cause collateral damage. According to Akamai, in the first quarter there were six DDoS attacks that exceeded 30 million packets per second (Mpps), and two attacks that peaked at over 50 Mpps. DDoS reflection and amplification techniques continue to be used extensively. These involve abusing misconfigured servers on the Internet that respond to spoofed requests over various UDP-based protocols. Around one-in-four of all DDoS attacks seen during the first three months of 2016 contained UDP (User Datagram Protocol) fragments. This fragmentation can indicate the use of DDoS amplification techniques, which results in large payloads. The four next most common DDoS attack vectors were all protocols that are abused for DDoS reflection: DNS (18 percent), NTP (12 percent), CHARGEN (11 percent) and SSDP (7 percent). Another worrying trend is that an increasing number of attacks now use two or more vectors at the same time. Almost 60 percent of all DDoS attacks observed during the first quarter were multivector attacks: 42 percent used two vectors and 17 percent used three or more. “The continued rise of multi-vector attacks suggests that attackers or their attack tools are growing more sophisticated,” the Akamai researchers said in their report. “This causes problems for security practitioners, since each attack vector requires unique mitigation controls.” China, the U.S. and Turkey were the top three countries from where DDoS attack traffic originated, but this indicates where the largest number of compromised computers and misconfigured servers are located, not where the attackers are based. The most-hit industry was gaming, accounting for 55 percent of all attacks. It was followed by software and technology (25 percent), media and entertainment (5 percent), financial services (4 percent) and Internet and telecommunications (4 percent). Being hit by one isn’t the only way DDoS attacks can affect businesses: They can also be blackmailed with the threat of one, an increasing trend over the past year. In some cases attackers don’t even have to deliver on their threats. Researchers from CloudFlare reported recently that an extortion group earned $100,000 without ever launching a single DDoS attack. Source: http://www.itnews.com/article/3079988/massive-ddos-attacks-reach-record-levels-as-botnets-make-them-cheaper-to-launch.html

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Massive DDoS attacks reach record levels as botnets make them cheaper to launch

Anonymous DDoS and shutdown London Stock Exchange for two hours

Anonymous hacktivists take down the London Stock Exchange website for more than two hours as part of protest against world’s banks The online hacktivist group, Anonymous reportedly shut down the London Stock Exchange (LSE) website last week for more than two hours as part of a protest against world’s banks and financial institutions. According to the Mail on Sunday, the attack was carried out by Philippines unit of Anonymous on June 2 at 9am. Previous targets have included the Bank of Greece, the Central Bank of the Dominican Republic and the Dutch Central Bank. The newspaper says: “Anonymous claims the incident was one of 67 successful attacks it has launched in the past month on the websites of major institutions, with targets including the Swiss National Bank, the Central Bank of Venezuela and the Federal Reserve Bank of San Francisco.” A spokesperson for the LSE declined to comment on the incident, however, the attack most likely took the form of a distributed denial of service (DDoS) attack, meaning trading would not have been affected and no sensitive data would have been compromised. In the 24 hours before the LSE site went down, the group also claims that the attack on the LSE was the latest in a series that has also seen it target the websites of NYSE Euronext, the parent company of the New York Stock Exchange and the Turkey Stock Exchange, as part of a campaign called Operation Icarus. According to the newspaper, City of London Police said it was not informed that the LSE website had gone down and had no knowledge of the attack. However, the latest attack may not be a complete surprise. In a video posted to YouTube on May 4, a member of the amorphous group announced in that “central bank sites across the world” would be attacked as part of a month-long Operation Icarus campaign. The video statement said: “We will not let the banks win, we will be attacking the banks with one of the most massive attacks ever seen in the history of Anonymous.” By using a distributed-denial-of-service (DDoS) cyberattack, the group also successfully disrupted the Greek central bank’s website. In light of that event, a separate video was posted to YouTube on May 2. The masked individual representing Anonymous group said: “Olympus will fall. How fitting that Icarus found his way back to Greece. Today, we have continuously taken down the website of the Bank of Greece. Today, Operation Icarus has moved into the next phase.” The Anonymous spokesperson added: “Like Icarus, the powers that be have flown too close to the sun, and the time has come to set the wings of their empire ablaze, and watch the system their power relies on come to a grinding halt and come crashing down around them. We must strike at the heart of their empire by once again throwing a wrench into the machine, but this time we face a much bigger target – the global financial system.” Source: http://www.techworm.net/2016/06/anonymous-ddos-shutdown-london-stock-exchange-two-hours.html

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Anonymous DDoS and shutdown London Stock Exchange for two hours

BitGo Under DDoS Attack; Wirex Advises Customers Not To Use Platform

Wirex, a bitcoin debit card provider, sent an email to customers today advising them to avoid making transactions on the Wirex platform until it could confirm from thatBitGo services have been resumed. The message included a BitGo tweet advising users it was under a distributed denial of service (DDoS) attack. BitGo is a wallet and a security platform for bitcoin and blockchain technologies. “We, therefore, recommend to avoid making any transactions via E-Coin/Wirex platform until confirmation from BitGo that the services have been resumed,” the Wirex email noted. The BitGo tweet stated: “We apologize for the issue, but we’re under DDOS attack at this moment. We’re working on it and will keep you updated.” Wirex is a wallet service that provides both physical and virtual bitcoin debit cards. Wirex users were able to send bitcoin from within the BitGo Instant network. BitGo Offers Instant Settlement Wirex uses the BitGo Instant service, which provides immediate settlement of bitcoin transactions, CCN reported in February. There was nothing on the BitGo blog about the attack at the time of this report. BitGo’s service eliminates the “double spend” potentiality in bitcoin transactions. The service is for users seeking instant bitcoin transactions while securing funds against the possibility that the sender will spend the money elsewhere before the transaction gets confirmed via the blockchain. BitGo provides immediate transaction settlement using the crypto keys among participating users’ wallets. BitGo Gains A Following Other cryptocurrency exchanges and apps offering BitGo Instant include Bitstamp, Bitfinex, Unocoin, Kraken and the Fold app. There have been several DDoS attacks bitcoin wallets and exchanges in recent months. Bitcoin and alt.coins exchange BTC-e suffered a DDoS attack in January. BTCC, the Shanghai, China-based digital currency exchange, suffered a DDoS attack at the end of last year. OkCoin, another exchange, was also the target of a DDoS attack in July. Source: https://www.cryptocoinsnews.com/bitgo-ddos-wirex-advisory/

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BitGo Under DDoS Attack; Wirex Advises Customers Not To Use Platform

NTP Patches Flaws That Enable DDoS

The network time protocol, at the center of a number of high-profile DDoS attacks in 2014, was updated on Thursday to ntp-4.2.8p8. The latest version includes patches for five vulnerabilities, including one rated high-severity. NTP, specifically the NTP daemon, synchronizes system clocks with time servers. Vulnerable NTP servers were used two years ago with regular frequency to carry out amplification attacks against targets. High-bandwidth NTP-based DDoS attacks skyrocketed as attackers used vulnerable NTP implementations to amplify DDoS attacks much in the way DNS amplification has been used in the past. Some NTP amplification attacks reached 400 Gbps in severity, enough to bring down even some of the better protected online services. US-CERT today released a vulnerability notification about the latest set of NTP vulnerabilities. “Exploitation of one of these vulnerabilities may allow a remote attacker to cause a denial-of-service condition,” the US-CERT advisory said. US-CERT also published a list vendors potentially vulnerable to attack; as of this afternoon, only the NTP project’s ntpd implementation is known to be affected. The status of the remainder of the A-Z list of vendors is characterized as unknown. “Unauthenticated, remote attackers may be able to spoof or send specially crafted packets to create denial of service conditions,” US-CERT said. One of the vulnerabilities, privately reported by Cisco, is a crypto-NAK crash or denial-of-service bug. Crypto-NAK responses are sent by NTP servers if a server and client do not agree on a message authentication code. The four remaining flaws were disclosed by Red Hat researchers. One is related to the crypto-NAK issue. “An attacker who knows the origin timestamp and can send a spoofed packet containing a CRYPTO-NAK to an ephemeral peer target before any other response is sent can demobilize that association,” an NTP.org bug report says. Another patch corrects a flaw where spoofed server packets were processed. “An attacker who is able to spoof packets with correct origin timestamps from enough servers before the expected response packets arrive at the target machine can affect some peer variables and, for example, cause a false leap indication to be set,” said the bug report. An autokey association reset flaw was also patched. Here an attacker who spoofs a packet with a correct origin timestamp before the response arrives can send a crypto-NAK or bad MAC and cause an association’s peer variables to be cleared, eventually preventing it from working correctly. The final vulnerability addressed is an issue where broadcast clients may be flipped into interleave mode. Source: NTP Patches Flaws That Enable DDoS https://wp.me/p3AjUX-uOO

DDoS Attacks via TFTP Protocol Become a Reality After Research Goes Public

Almost three months after researchers from the Edinburgh Napier University published a study on how to carry out reflection DDoS attacks by abusing TFTP servers, Akamai is now warning of real-life attacks. Akamai SIRT, the company’s security team, says its engineers detected at least ten DDoS attacks since April 20, 2016, during which crooks abused Internet-exposed TFTP servers to reflect traffic and send it tenfolds towards their targets, in a tactic that’s called a “reflection” (or “amplification”) DDoS attack. The crooks sent a small number of packets to TFTP servers, which contained various flaws in the protocol implementation, and then sent it back multiplied to their targets. The multiplication factor for TFTP DDoS attacks is 60, well above the regular average for reflection DDoS attacks, which is between 2 and 10. First instances of TFTP reflection DDoS attacks fail to impress Akamai says the attacks they detected employing TFTP servers were part of multi-vector DDoS attacks, during which crooks mixed different DDoS-vulnerable protocols together, in order to confuse their target’s IT department and make it harder to mitigate. Because the attack wasn’t pure, it never reached huge statistical measurements. Akamai reports the peak bandwidth was 1.2 Gbps and the peak packet volume was 176,400 packets per second. These are considered low values for DDoS attacks, but enough to consume the target’s bandwidth. Akamai SIRT says they’ve seen a weaponized version of the TFTP attack script circulating online as soon as the Napier University study was released. The crooks seem to have misconfigured the attack script The attack script is simple and takes user input values such as the victim’s IP, the attacked port, a list of IP addresses from vulnerable, Internet-available TFTP servers, the packet per second rate limit, the number of threads, and the time the script should run. In the attacks it detected, Akamai says the crooks ignored to set the attacked port value, and their script send out traffic to random ports on the target’s server. Back in March, Napier University researchers said they’ve found over 599,600 publicly open servers that had port 69 (TFTP) open. Akamai warns organizations to secure their TFTP servers by placing these servers behind a firewall. Since the 25-year-old TFTP protocol doesn’t support modern authentication methods, there is no good reason to have these types of servers exposed to the Internet. Source: http://news.softpedia.com/news/ddos-attacks-via-tftp-protocol-become-a-reality-after-research-goes-public-504713.shtml#ixzz4AH801pER

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DDoS Attacks via TFTP Protocol Become a Reality After Research Goes Public