Big ISP = Big zombie army

Share this article:

Swathes of virus-infected PC’s are being hosted on some of the world’s biggest ISP’s including AOL, Bellsouth and Verizon.

Analysis of zombie networks by DDoS security company Prolexic showed high profile ISPs are the most likely to harbour compromised machines.

"It isn't surprising, it is these networks that are continually exploited to support large-scale DDoS attacks," said Barrett Lyon, CTO at Prolexic. "Just because a home user subscribes to a reputable brand doesn't mean they're safe from the online criminal fraternity."

Along with AOL, Bellsouth and Verizon, Comcast were criticized. Significantly, Earthlink, another sizeable ISP was not on the list of main offenders.

The report also highlighted major changes in the way that DDoS attacks have been coordinated over the last year, focussing less on layer-3 TCP and hitting weak DDoS mitigation devices.

"We have seen a 100 percent failure rate in several DDoS mitigation devices. Hardware does a poor job in identifying attacks that emulate legitimate traffic. Therefore, enterprises that rely on these devices are particularly vulnerable to this attack vector. Essentially, extortionists are becoming more intelligent and circumnavigating the security put in place to stop them," said Lyon.

The report also revealed that Hong Kong is the most infected country per capita. Which may explain the country's spam problem, due to be addressed by upcoming anti-spam legislation.

www.prolexic.com

Share this article:

Sign up to our newsletters

More in News

Brazilian president signs internet 'Bill of Rights' into law

Brazilian president signs internet 'Bill of Rights' into ...

President Dilma Rousseff signed the legislation on Wednesday at the NetMundial conference in Sao Paulo.

Android trojan sends premium SMS messages, targets U.S. users for first time

Android trojan sends premium SMS messages, targets U.S. ...

An SMS trojan for Android, known as FakeInst, has been observed sending premium SMS messages to users all over the world, including, for the first time, the United States.

Report: DDoS up in Q4 2013, vulnerability scanners leveraged to exploit sites

Report: DDoS up in Q4 2013, vulnerability scanners ...

Researchers observed 346 DDoS attacks in the final quarter of 2013 and attackers used Vega and Skipfish vulnerability scanners to exploit web flaws at financial companies.