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Kazaa and eDonkey brace for NetSky-Q onslaught

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SANS - Survey on application security programs

Zombie PCs infected with the NetSky-Q worm are set to launch distributed denial of service attacks against P2P and warez sites tonight.

The worm will attempt to flood the main Web sites of Kazaa and eDonkey with spurious traffic between 00:01 8 April and 11 April (time taken from system clocks). Other sites including www.cracks.st, www.cracks.am and www.emule-project.net are also targeted for attack. File-sharing networks themselves won't be affected by the worm, only access to Web sites.

NetSky-Q, which first appeared on 29 March, includes a message from the virus authors embedded within its code. The previously unknown "SkyNet Antivirus Team" from Russia claim they are educating users, and want to prevent hacking and sharing of illegal content.

Between 14 April and 23 April a much rarer worm - NetSky-T - will launch a fresh wave of attacks against a similar set of sites: cracks.am, emule.de, kazaa.com, freemule.net and keygen.us. A few copies only have this low-risk virus have escaped onto the Net, so the consequence are likely to be limited.

Targeted sites have already begun to make preparations in advance of the anticipated onslaught.

The eMule project has posted a notice advising users that its main emule-project.net site will be unavailable "because of the upcoming DDoS Attack against our servers" between today and 16 April. It advises users to visit a mirrored site - www.emule-project.org - instead during the attack.

Carole Theriault, a security consultant at Sophos, said it is unclear how intense the NetSky-Q attack might be. She thinks that relatively small sites targeted would find it difficult to fend off attack, even though they've had a week to prepare for the assault. DDoS attacks are notoriously difficult to defend against.

In February, SCO pulled the plug on its main Web site, following a huge DDoS attack initiated from PCs infected with the MyDoom worm. It decamped to an alternative site, www.thescogroup.com, after the attack began. RIAA and Microsoft have also been prominent targets for DDoS attacks.

NetSky-Q exploits the Microsoft iFrame vulnerability to execute itself automatically on vulnerable machines. The flaw, now three years old, can be patched by following the links in Microsoft's bulletin here.

Advice from anti-virus vendors follows a familiar pattern: block executables files at the gateway, don't open unsolicited email attachments, update AV signature files, apply patches, use a personal firewall and wear a regulation tin-foil hat. ®

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