Stupid Redmond kicked over our honeypots, wail white hats Security researchers are complaining about collateral damage from the latest botnet take-down efforts by Microsoft and its partners.…
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Microsoft borks botnet takedown in Citadel snafu
Last week's disruption of nearly 1500 Citadel botnets believed to be responsible for over half a billion US dollars in financial fraud and affecting more than five million people in 90 countries has b…
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Microsoft Citadel takedown ultimately counterproductive
Distributed-denial-of-service attacks against U.S. banks have been dormant for nearly four weeks, leading security experts to question when and if a new phase of attacks might emerge. The hacktivist group Izz ad-Din al-Qassam Cyber Fighters , which since last September has taken credit for the hits against banks, claimed its attacks were in protest of a YouTube movie trailer deemed offensive to Muslims. But some observers have speculated that Iran was backing the DDoS strikes against banks as payback for cyber-espionage attacks, such as Stuxnet, Flame and Duqu, that have over the last three years affected Iranian computer systems. Rodney Joffe, senior technologist for online security provider Neustar Inc., says the current lull could be a sign that the attacks waged by the hacktivist group are over. “It’s a wild conjecture,” Joffe says. “But we may have seen the end of them.” Joffe says indirect activity linked to the al-Qassam Cyber Fighters’ botnet, known as Brobot, has continued. But there have been no direct attacks. And that lack of activity raises questions about whether al-Qassam will wage any more attacks, Joffe says. “The botnet is no bigger than it was,” he says. “We take [compromised] machines down and then new machines keep getting adding. I still have hope that the government will have some impact or effect, but don’t know one way or the other.” The Federal Bureau of Investigation in April warned that Brobot had been modified, “in an attempt to increase the effectiveness with which the [botnet’s] scripts evade detection.” The FBI said the actors behind Brobot were changing their attack methodology to circumvent mitigation efforts put forth by U.S. banking institutions The FBI also noted that as of April 10, 46 U.S. banking institutions had been targeted by more than 200 separate DDoS attacks of “various degrees of impact” since September. Financial fraud expert Avivah Litan , an analyst at Gartner, says intervention from federal authorities may have spurred al-Qassam to halt its attacks. But, like Joffe, she says there is no way to be sure. “I do know the banks were trying to get the White House to do something politically, and that could be what’s happened.” But other experts, such as Mike Smith of Web security provider Akamai Technologies, don’t think there’s been anything going on behind the scenes to keep the attacks from resuming. Different Attack Actors Other experts anticipate that another group could emerge to resume DDoS attacks against banks if Izz ad-Din al-Qassam Cyber Fighters ends its campaigns. “There has been a lull in the al-Qassam-like attacks,” says Scott Hammack , CEO of DDoS-mitigation provider Prolexic. “But I would definitely not misunderstand this lull as being an end to these types of attacks. The attacks will continue; it’s really just a question of when, not if.” The current break comes after a third phase of hacktivist attacks, which kicked off in March. The latest campaign ran eight weeks, the longest-running so far. The break from the third phase of attacks has lasted four weeks so far. By comparison the break between the first campaign , which began Sept. 18, and the second campaign , which kicked off Dec. 10, lasted six weeks. And the break between the second and third campaigns lasted five weeks. Hammack, like Smith, says Brobot, as well as other botnets, continue to grow. In fact, over Memorial Day weekend, Prolexic helped to mitigate a 167-gigabyte DNS-reflection attack, the largest attack recorded to date, Hammack says. “The attack traffic was global and required us to use all four of our cloud-based scrubbing centers,” he says. DNS-reflection was the attack method used in Operation Stophaus , an attack waged in March by The Spamhaus Project, a Geneva-based not-for-profit organization dedicated to fighting Internet spam. And while it’s not an extremely sophisticated type of attack, Hammack says these types of DDoS strikes are only going to become more prevalent. “There are plenty of countries where rogue elements will continue to exist,” he says. “You’re never going to overcome that. I think, if anything, people should be taking advantage of this down time to fortify their infrastructures.” The application-layer attacks al-Qassam Cyber Fighters favored in its last two campaigns have remained inactive, despite that the group appears to continue efforts to grow and strengthen its botnet. “The botnets are out there,” Hanmmack says. “We have between 15,000 and 100,000 compromised web servers out there that we know of. So the artillery is still out there to create these types of attacks. We just haven’t seen any of the web server attacks for the last 30 days.” Why Have Attacks Stopped So why have the hacktivists remained quiet for the last month? On May 6, al-Qassam Cyber Fighters claimed on the open forum Pastebin that its attacks would cease for just a week, out of respect for OperationUSA , a separate hacktivist movement organized by Anonymous that proved unsuccessful Many experts predicted the group’s attacks against banks would resume by May 14. But they didn’t. Some have speculated that international law enforcement could be close to nailing members of the al-Qassam team. But Hammack says drawing conclusions based on the ebbs and flows of DDoS attacks is dangerous because hacktivists attack in waves. “Certain attacks die down after certain periods,” he says. “That doesn’t mean, though, that the attacks are over.” Banking institution leaders say they’ve been advised by groups such as the Financial Services Information Sharing and Analysis Center not to lessen their DDoS mitigation efforts. Litan says banks are heeding that advice. “The banks have more vendors involved now,” she says. “I don’t think they’ll ever pull back. They have put a lot of systems in. They really can’t go back now, and they shouldn’t.” Source: http://www.bankinfosecurity.com/are-ddos-attacks-against-banks-over-a-5801/op-1
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Are DDoS Attacks Against Banks Over?
Mt. Gox is the the largest Bitcoin exchange in the world, and as such it and its users are being repeatedly targeted by attackers. Some two months ago, it battled a massive DDoS attack that was lik…
Distributed denial-of-service (DDoS) attacks that could be related have in the past few days slammed the DNS servers of at least three providers of domain name management and DNS hosting services. DNSimple, easyDNS and TPP Wholesale all reported temporary DNS service outages and degradation on Monday, citing DDoS attacks as the reason. In some cases the attacks started a few days ago and are ongoing. TPP Wholesale, a subsidiary of Sydney-based Netregistry, one of Australia’s largest providers of Web hosting, domain management and other online services, alerted its customers through its website on Monday that eight of its DNS servers experienced “unscheduled service interruption.” TPP Wholesale experienced a series of DDoS attacks against its DNS name servers over the past several days, the Netregistry Group Security Team said in a blog post. The company managed to mitigate the DDoS attacks that caused service interruptions throughout Monday by taking “the drastic step” of rate-limiting DNS queries, the team said. Such aggressive filtering is prone to false positives and might result in some customers being denied DNS service. “In the next few days we will continue to whitelist such false positives as we discover them,” the team said. Second wave EasyDNS, a DNS hosting provider based in Toronto, also reported DNS service disruptions caused by a DDoS attack on Monday. “This looks like a larger version of a smaller DDoS yesterday which was possibly a test run,” the company’s CEO Mark Jeftovic said Monday in a blog post. “This DDoS attack is different from our previous ones in that it looks as if the target is us, easyDNS, not one of our clients.” Jeftovic said that it was difficult to differentiate the real traffic from the DDoS traffic, but the company managed to partially mitigate the attack and also published workarounds for affected customers. “This is the ‘nightmare scenario’ for DNS providers, because it is not against a specific domain which we can isolate and mitigate, but it’s against easyDNS itself and it is fairly well constructed,” he said. Third victim Aetrion, based in Malabar, Florida, operates a DNS hosting service called DNSimple, which was also attacked on Monday. According to DNSimple founder Anthony Eden, the DDoS attack is ongoing, but the company managed to mitigate it. “Our authoritative name servers were used as an amplifier for an attack against a third-party network,” Eden said Tuesday via email. “The attacker essentially flooded us with ‘ANY’ queries for a variety of domains managed by our DNS service, with the intention of amplifying these small queries into significantly larger responses aimed at a specific network.” This attack technique is known as DNS reflection or DNS amplification. It involves sending queries with a spoofed source IP (Internet Protocol) address—usually the victim’s address—to DNS servers from a large number of computers in order to trigger long responses to be sent by those servers to victim’s IP address within a short time window. If enough computers and DNS servers are used, the resulting rogue DNS traffic will exhaust the victim’s available Internet bandwidth. The DNS reflection technique has been known for a long time. However, its recent use to launch DDoS attacks of unprecedented scale, like the one in March that targeted a spam-fighting organization called Spamhaus, has likely brought it renewed interest from attackers. The attack experienced by DNSimple on Monday was significantly larger in volume and duration than other attacks that hit the company’s name servers in the past, Eden said. He believes that the attack is related to the ones experienced by easyDNS and TPP Wholesale. “The pattern displayed on TPP Wholesale’s blog is similar to what we see, and we have been communicating with easyDNS and find similarities between the attacks.” EasyDNS and TPP Wholesale did not immediately respond to inquiries seeking more information about the recent attacks against their servers and confirmation that they were using DNS reflection techniques. Attack and abuse reports on the increase It’s possible that DNS servers operated by other companies were also affected by this attack, Eden said. “A DNS provider will have a significantly higher number of customers and thus the attacks get noticed much sooner because it affects a larger group of people,” he said. DNSimple’s authoritative name servers were used to amplify a DDoS attack directed at a server hosting company called Sharktech or one of its customers, Eden said. Sharktech has noticed a surge of abuse reports in the past 24 hours coming from ISPs and hosting companies complaining about DDoS attacks against their DNS servers that appear to originate from Sharktech, said Tim Timrawi, president and CEO of Sharktech, via email. Upon further investigation the company determined that these reports were actually the result of a DNS amplification attack against its own customers that abused the authoritative DNS servers of those companies, he said. Most of the affected DNS servers were secured properly and were being queried for domains they are responsible for, Timrawi said. “Unlike previous DNS Amplification Attacks in which the attacker used open recursive DNS servers, in this one, the attacker is collecting all the DNS servers they can find and sending MX (and other kind of queries) to them for their domain records with a spoofed source of the target host,” he said. The amplified DDoS attack targeting Sharktech customers was larger than 40Gbps, Timrawi said. “We are unaware of the reason behind the attacks,” he said. The abuse of authoritative name servers in DNS reflection attacks is not very common because attackers need to know the exact domain names that each abused server is responsible for, said Carlos Morales, vice president of sales engineering and operations at DDoS mitigation provider Arbor Networks. Obtaining this information is not very hard, but it does require additional work compared to abusing open DNS resolvers, and attackers usually prefer the easiest route to reach their goals, he said. Open DNS resolvers are recursive DNS servers that are configured to accept queries from any computers on the Internet. These act as relays between users and authoritative DNS servers; they receive queries for any domain name, find the authoritative name server responsible for it and relay the information obtained from that server back to the user. Meanwhile, authoritative name servers, like those operated by DNSimple, easyDNS and TPP Wholesale, will only respond to queries concerning the domain names they serve. Well-prepared attackers The extra work required to target such servers suggests that the attackers behind the recent attacks on these DNS hosting providers were well prepared and did their homework in advance, Morales said. One mitigation against this kind of attack is to configure the DNS server software to force all “ANY” queries sent over UDP (User Datagram Protocol) to be resent over TCP (Transmission Control Protocol) instead, Eden said. This can be done by sending a UDP response with the TC bit set and an empty answer section. A legitimate DNS client will retry over TCP, while a bogus client will get no benefit, he said. In the case of open resolvers, the problem can be mitigated by restricting which IP addresses are allowed to query them, said Morales. For example, an ISP operating a DNS resolver for its customers can restrict its use to only IP addresses from its network, he said. However, this kind of mitigation is not applicable to authoritative name servers because they are meant to be queried by anyone on the Internet who wants to get information about the specific domain names served by them, Morales said. The mitigation described by Eden is very good and is actually one that Arbor also uses to protect authoritative name servers, he said. Another mitigation is to enforce a query rate limit for source IP addresses, he said. Source: http://www.pcworld.com/article/2040766/possibly-related-ddos-attacks-cause-dns-hosting-outages.html
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Possibly related DDoS attacks cause DNS hosting outages
‘All you need is 10 lines of code and a lot of patience’ Hackers are increasingly turning to DNS reflection to amplify the volume of distributed denial of service (DDoS) attacks.…
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Spamhaus-style DDoS attacks: All the hackers are doing it
Lately, DDoS attacks have crept back into the headlines, forcing businesses to reacquaint themselves with the concept. DDoS stands for distributed denial-of-service which uses multiple machines to carry out a DoS attack on unsuspecting victims. It is estimated that over 7,000 attacks happen daily with the motives and severity of consequences varying between different attacks but all have the potential to greatly harm a company’s operations. To minimize any possible damage, it is important to prepare a defense against these malicious attacks especially as they are on the rise and could target your business at any moment. How to realize you are in the midst of a DDoS attack At the beginning of a DDoS attack, you may fail to even realize what is occurring. The optimistic side of you wants to believe that your marketing efforts have finally kicked in and created a sudden wave of interested customers to your website. However great that may be, the reality is as the numbers increase and overwhelm your servers, you are more likely to be under attack. When a DDoS attack occurs they are using one of two avenues: a special malware that infects the machines of others in order to carry out the attack from a large number of hosts or utilizing a large number of volunteers to their cause to perform the attack in unison. Regardless of the technique employed, they both use many host computers to access the target’s website and overwhelm their servers which results in long periods of downtime. Why Attackers Target You The reasons behind DDoS attacks can vary depending on the organization performing the attack and who they are attacking. The most common reason behind an attack is extortion where they perform a small attack on your servers first, then contact you demanding a certain amount of money to prevent a larger attack from occurring. The more profitable a company you are, the higher the chance you will be a target for extortion. Also, if your organization is currently in the spotlight for political controversy, there are many “hacktivists,” like the group Anonymous, who carry out DDoS attacks to satisfy their political agenda. Lastly, in sophisticated and large-scale attacks, the hackers could be attempting a security breach in order to obtain confidential information. All of these causes could create a devastating impact upon your company’s image. The Effects of DDoS Attacks 1. Revenue The more heavily you rely on your website as a means for business, the more severe a DDoS attack will affect your company. The average daily revenue loss from attacks for those that depend heavily on the Internet for their business is $2,000,000 or nearly $100,000 per hour. Even if you are a smaller organization with less reliance on the Internet, the average loss is $10,000 per hour when in downtime. These are significant amounts of losses that could be hard to recover from, especially for a small business. 2. Reputation As a DDoS attack is occurring, it becomes nearly impossible for any customer to access your website and results in an unpleasant experience for them. For instance, if you are a banking website, they can’t access their accounts which is very critical and leaves them feeling like their private information is at risk. Even after the attack is over, you will have to spend time and money in public relations efforts to reinstate faith in your service from your customer base. 3. Lawsuits When the attack breaches security and confidential information, a risk for lawsuits from customers and consumer protection groups occurs. Now you are not only looking at revenue loss from the downtime and from a loss of reputation but also, significant legal fees associated with your company failing to protect customer information. If all three occur, the DDoS attack could be enough to send your company into bankruptcy and impending failure. How to Protect Your Company The devastating effects from a DDoS attack is enough to leave you shaking in your boots, however most companies still fail to provide adequate protection against said attacks. As the sophistication of these attacks increase, your company’s firewall and current security measures may not be enough to handle a full-scale attack. In a recent survey, Neustar only found that 3% of the surveyed organizations had an anti-DoS solution. Here are some steps you should take to protect your company in the event of a DDoS attack: Develop a defense strategy immediately so you are prepared to take action when an attack occurs. Identify current security lapses or vulnerabilities within your website. If you have been a victim from an attack, keep information collected about it so you can determine how to properly fight off future attacks Simulate a DDoS attack to ensure your response measures are adequate. Consider purchasing an anti-DoS service from a security provider to narrow the possibility of attack. Combine anti-DoS service with the above steps to provide a comprehensive approach to protection. As DDoS attacks are on the rise, now is the time to prepare your company in the event of attack. Even smaller organizations could become victims, so it is important to be ready to defend your company’s website and servers from hackers. Following the steps for protection can prevent a DDoS attack from causing results that could be extremely difficult to recover from, allowing you to come out victorious in an otherwise disastrous situation. Source: http://technologyadvice.com/preparing-for-battle-ddos-attacks-on-business/
The undead are coming, and they have 1Gbps pipes! A critical vulnerability in trendy web programming kit Ruby on Rails is being abused to conscript hacked website servers into a growing botnet army.…
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Ruby on Fails: Zombie SERVER army built thanks to Rails bug
Just when you thought you could tune out the fears about DDoS (distributed denial of service) attacks, listen up: the risks for you suddenly are much graver, and it may be the time when defensive action on your part has become necessary. Yes, the fear-mongering over the May 7th DDoS blitzkrieg – which turned out to be a non-event – has prompted many credit union executives to turn off the DDoS discussion. That’s a mistake, however. “Three years ago I would have called DDoS a nuisance. Now it is a threat to many more businesses,” said Vann Abernethy, an executive with security firm NSFOCUS. A big change that is occurring, sources insist to Credit Union Times , is that for-rent DDoS networks – often costing spare change – are proliferating and they have plenty of firepower to take down most credit unions’ online presences. The scariest part: absolutely no technical skills are required to deploy what is being called DDoS as a service. All that’s needed is digital money – PayPal or BitCoin and there even are some providers that take MasterCard and Visa. Barry Shteiman, senior security strategist at Imperva, named names of sites that he said offer what seems to be DDoS for hire: SSH Booter, Empire Stresser, Quantum Stresser, Asylum Stresser, Titanium Stresser, Illuminati Stresser, Legion Stresser, Agony Stresser. The list is not complete. “There are dozens of companies selling DDoS as a service now,” said Sean Bodmer, chief researcher, Counter-Exploitation Intelligence, for CounterTack. Note: Almost all such sites claim to offer, not rogue DDoS for hire, but “stress testing” so that an organization – a credit union for instance – can check its DDoS defenses. Just one problem: sources insisted that the majority of stress-testing sites they are familiar with do no verification that the person buying the “stress test” has any affiliation whatsoever with the target. What’s fueled the rise in DDoS as a service? For one, the intense publicity for DDoS has just about everybody aware of the attack format. For two, “As email spam has become more and more a solved problem it has forced criminals with botnets to find other uses for them. DDoS lets them monetize their botnets,” said Matthew Prince, CEO of CloudFlare, a DDoS mitigation company. DDoS as a service prices are also tumbling. Hemant Jain, vice president of engineering for security company Fortinet, said that he has found providers who are selling an hour of DDoS for $5, a 24-hour day of it for $40 and a week for $260. Can’t these DDoS as service provider be shut down by law enforcement? It’s not that easy. Commented Carl Herberger, vice president of security solutions at mitigation provider Radware, “It’s important to note that ‘DDos for Hire’ websites move around in terms of their technical underpinning. They don’t stay in one area or one location for too long. It’s almost like a game of “Whack-a-Mole” – just when you think you’ve identified the location of the website, it’s already moved.” Added Chris Ensey, COO of security company Dunbar Digital Army, “These (DDoS as a service) sites are being resold like white-labeled products now. Most of the sellers are just affiliates who leverage another botnet or platform” – that is, they have none of their own infrastructure and, poof, they can be here today and back tomorrow under a new flag. That’s the problem: it is very hard to pinpoint the location of a DDoS command and control center and when it’s found, said sources, it generally is in a country with little or no law enforcement reciprocity with the United States. The bottom line for credit unions: “They have to take DDoS seriously. There is no turning this back,” said Shteiman. The good news: the attack throughputs via DDoS for hire are tiny fractions of what al Qassam is throwing at money center banks – 1% or 2% of the volume in many cases. But that is plenty to knock out a credit union that lacks defenses. As for what defenses are needed to thwart for hire DDoS, experts indicated that in most cases low-cost mitigation, within the budget of just about every credit union, ought to suffice. Talk with mitigation companies, also ask Web hosts what protections they have on hand or can line up, Small expenditures ought to bring peace of mind – at least that’s what the experts are saying today Source: http://www.cutimes.com/2013/05/28/threat-of-the-week-ddos-for-hire-on-the-rise?ref=hp
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Threat of the Week: DDoS For Hire on the Rise
A recent expose shines a light onto the strange world of “booter” or “stressor” web sites which offer DDoS-attacks-for-hire Is an online payment giant Paypal unwittingly enabling DDoS attacks? That’s the question posed by security researchers who have studied a small, weird corner of the market for distributed denial of service (DDoS) services: so-called “booter” or “stressor” web sites. Speaking at The Security B-Sides Boston security conference on Saturday, independent researchers Allison Nixon and Brandon Levene said that their investigation of booter sites found that many rely on legitimate online services, including Paypal to accept payment on behalf of customers interested in attacking web sites they do not own, and Cloudflare, a DDoS prevention service. The presentation was just the latest to peek into the strange world of “booter” or “stressor” web sites, which offer DDoS attacks for hire, often targeted at online gaming services popular with teenagers. In the past week, the web site krebsonsecurity.com published exposes on two such sites: assylumstressor.net and Ragebooter.net, both booter services for hire. In the process, Krebs revealed the identities of the purported owners of the sites and details of conversations he had with them about their services. In their presentation Saturday, Levene and Nixon, who assisted Krebs in his research, said that the booter sites were common online, but wholly different from the massive, 300Gbps attacks directed at Spamhaus, or the site-crippling DDoS attacks on leading banks and financial services firms like Citi, Chase, Wells Fargo and others in recent months. Rather, the services use mostly simple, reflected DNS and UDP flood attacks to knock small sites and residential home routers offline, the two researchers said. Many of the features of sites like Ragebooter.net are poorly designed or don’t work at all, said Nixon. Most victims are very often small websites hosting online gaming servers. In fact, the most reliable customers of booter sites are often other booter sites, said Nixon. The sites are not hugely profitable, but do generate some income. An analysis of data on the site Asylumstressor.com by Nixon and Levene suggest that site operators made, at most, $23,000 in 2012 – though probably much less. The sites operate more or less in the open. Speaking with Brian Krebs last week, a Tennessee man named Justin Poland, the operator of ragebooter.net, argued that the services were legal. “Since it is a public service on a public connection to other public servers this is not illegal,” Poland told Krebs in a Facebook chat. Poland even claimed to be working on behalf of the local FBI, turning over information gleaned from his service to law enforcement as needed. The Memphis FBI would not confirm or deny that Poland’s claims were true. Legal or not, most booter sites operate more or less in the open and with impunity, Nixon told an audience at B-Sides Boston, which was held at Microsoft’s New England Research and Development Center (NERD) in Cambridge. Site operators – many teenagers and 20-somethings with little technical sophistication – make little effort to conceal their identities. Paypal payments are often sent to e-mail accounts that are also associated with public Facebook profiles, making it easy to link booter sites to real world identities like Poland’s, she said. Law enforcement seems unconcerned with small scale attack sites like Ragebooter.net, or those who operate them, meaning that booter site operators continue to operate despite ample evidence about who they are and the illegal nature of their business, Nixon said. Similarly, services like PayPal and Cloudflare enable small-scale DDoS operations to continue, by turning a blind eye to the true nature of their businesses. Nixon said as many as 70 percent of booter sites use Cloudflare, a DDoS protection site. The service mainly protects booter sites from other booter sites, she said. Paypal isn’t the only online payment service, but it is easy and convenient to use and widely respected. Inexperienced booters who had to go through the trouble of setting up an account at a site like LibertyReserve might think twice, Nixon argued. In an e-mail statement to ITworld and other news outlets, Paypal said that it couldn’t discuss the specifics of customer accounts but that it “will review suspicious accounts for malicious activity and work with law enforcement to ensure cyber criminals are reported properly.” “We take security very seriously at PayPal,” the statement continued. “We do not condone the use of our site in the sale or dissemination of tools, which have the sole purpose to attack customers and illegally take down web sites.” Cloudflare CEO Matthew Prince said that his company protects millions of web sites – most of them legitimate private and public sector entities. However, his company doesn’t discriminate, and Prince admits that some sites protected by Cloudflare are troubling, including the booter and stressor sites. Cloudflare works closely with law enforcement and always responds promptly to requests for information from the courts or law enforcement offiicals. However, in the absence of any action by law enforcement, Prince said that it isn’t for him or his company to decide who to work with. “I do find it troubling when there are extralegal measures taken to determine what is and is not going on,” he said, in an apparent reference to the investigation by Krebs, Nixon and Levene. “How far do you go with that, if someone assumes XYZ shouldn’t be on the Internet? Should Google remove them from their search index?” he asked. “We believe in due process,” said Prince. Source: http://www.itworld.com/it-management/357306/legitimate-online-services-enabling-ddos-attacks-hire-sites
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Legitimate online services enable DDoS-attacks-for-hire sites