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Attacking Nimda-Infected Attackers
Mullen has come up with two possible ways of shutting down the bandwidth-hungry attacks when an infected IIS box attempts to spread the worm, each with its own advantages and problems. Method one places a bit of harmless code in the boot sequence which simply precludes Nimda from loading. The advantage here is that the machine will be made harmless without interfering with any functionality or damaging any files. The disadvantage is that it involves privilege escalation and requires a remote re-boot, which are a bit aggressive however therapeutic they may be. The sudden re-boot could also be problematic where cached writes are common and RAM drives are in use, though supposedly Windows will handle them gracefully as it shuts down.
A Reuters hack unfortunately stated last week that the remedy would immobilize the machine until it's re-started, but this isn't correct. It does nothing except copy a bit of code and has no effect until the box is re-started.
The link for this article located at The Register is no longer available.