HTTP DDoS attack mitigation using tarpitting

Wednesday, 27 June 2007, 12:30 AM EST

Recently, the anti-spam organization Spamhaus has come under yet another distributed denial-of-service attack. With some help from our good friends at myNetWatchman we were able to obtain a sample of the malware used in the attack. This one is particularly nasty, starting up 1500 threads to send randomized HTTP requests to Spamhaus' webserver in a loop. This attack tool doesn't have a command-and-control mechanism, so it was likely force-installed on all the infected systems of an existing botnet.

At SecureWorks.

[ Read more ]




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