This is much larger than required to knock the typical website offline. The previous record holder was the attack against cybersecurity journalist Brian Krebs a month prior at 620 Gbps. The Dyn DDoS attack set a record at 1.2 Tbps. Everyone uses the same tools, the same techniques and the same tactics. The internet is the only place where we can’t tell the difference. In December 2014, there was a legitimate debate in the security community as to whether the massive attack against Sony had been perpetrated by a nation-state with a $20 billion military budget or a couple of guys in a basement somewhere. There’s not even much of a difference between government and criminal attacks. The smartest attacker needs to figure out the attack and write the software. Recently I have written about probing DDoS attacks against internet infrastructure companies that appear to be perpetrated by a nation-state. The perpetrators were most likely hackers mad at Dyn for helping Brian Krebs identify and the FBI arrest two Israeli hackers who were running a DDoS-for-hire ring. The Dyn attacks were probably not originated by a government.
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It’s called Mirai, and since the source code was released four weeks ago, over a dozen botnets have incorporated the code. The particular attack technique used against Dyn was first used a month earlier. Criminal groups offer DDoS services for hire.
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Fully capable DDoS attack tools are available for free download. These attack techniques are broadly available. The DDoS attack against Dyn two weeks ago was nothing new, but it illustrated several important trends in computer security. A 2007 DDoS attack against Estonia was blamed on Russia and widely called an act of cyberwar. Military agencies are also thinking about DDoS as a tool in their cyberwar arsenals. Criminals have used these attacks as a means of extortion, although one group found that just the fear of attack was enough.
In 2013, the hacker group Anonymous petitioned the White House to recognize DDoS attacks as a legitimate form of protest. More recently, they’ve become vehicles of protest. The attacks started out as a way to show off, then quickly transitioned to a method of intimidation or a way of just getting back at someone you didn’t like. That’s a DDoS attack it’s simple brute force.Īs you’d expect, DDoSers have various motives. If I can trick many millions, I might be able to crush your house from the weight. If I can trick tens of thousands of others to order pizzas to be delivered to your house at the same time, I can clog up your street and prevent any legitimate traffic from getting through. You can imagine how it might work in the real world. They then target that botnet against a single victim. Cybercriminals infect innocent computers around the internet and recruit them into a botnet. This is the “distributed” part of the DDoS attack, and pretty much how it’s worked for decades. It is much smarter to recruit millions of innocent computers on the internet. The attacker can build a giant data cannon, but that’s expensive. If the attacker can throw more data than the victim can process, he or she will win. If the defender has a larger capacity to receive and process data, he or she will win. There are more or less clever variants, but basically, it’s a datapipe-size battle between attacker and victim. The attacker sends a massive amount of traffic, causing the victim’s system to slow to a crawl and eventually crash. DDoS attacks are neither new nor sophisticated. A week ago Friday, someone took down numerous popular websites in a massive distributed denial-of-service (DDoS) attack against the domain name provider Dyn.
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