[ISN] DDoS attacks on major US banks are no Stuxnet -- here's why

http://arstechnica.com/security/2012/10/ddos-attacks-against-major-us-banks-no-stuxnet/

By Dan Goodin
Ars Technica
Oct 3, 2012

The attacks that recently disrupted website operations at Bank of 
America and at least five other major US banks used compromised Web 
servers to flood their targets with above-average amounts of Internet 
traffic, according to five experts from leading firms that worked to 
mitigate the attacks.

The distributed denial-of-service (DDoS) attacks -- which over the past 
two weeks also caused disruptions at JP Morgan Chase, Wells Fargo, US 
Bancorp, Citigroup, and PNC Bank -- were waged by hundreds of 
compromised servers. Some were hijacked to run a relatively new attack 
tool known as "itsoknoproblembro." When combined, the above-average 
bandwidth possessed by each server created peak floods exceeding 60 
gigabits per second.

More unusually, the attacks also employed a rapidly changing array of 
methods to maximize the effects of this torrent of data. The uncommon 
ability of the attackers to simultaneously saturate routers, bank 
servers, and the applications they run -- and to then recalibrate their 
attack traffic depending on the results achieved -- had the effect of 
temporarily overwhelming the targets.

"It used to be DDoS attackers would try one method and they were kind of 
one-trick ponies," Matthew Prince, CEO and founder of CloudFlare, told 
Ars. "What these attacks appear to have shown is there are some 
attackers that have a full suite of DDoS methods, and they're trying all 
kinds of different things and continually shifting until they find 
something that works. It's still cavemen using clubs, but they have a 
whole toolbox full of different clubs they can use depending on what the 
situation calls for."

[...]


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