Access "What CISOs need to know about computer forensics"
This article is part of the September 2007 issue of How to dig out rootkits
Don't trample evidence in a breach. Missteps in an investigation will cost you in court. From all indications, something bad had happened. After installing an intrusion prevention system, the security team at UW Medicine spotted several machines trying to communicate with an IRC botnet server in France. Cindy Jenkins, a security engineer and computer forensics expert at the medical and research organization, immediately went on a hunt for clues behind the suspicious activity. Hours spent combing through images of the hard drives from the infected PCs turned up the attackers' tools: an IRC bot, a rootkit and an FTP server. Passive network scanning detected more compromised systems. To save time, Jenkins made hash sets--digital fingerprints--of the malware so she could look just for the hash sets when inspecting additional images. She determined the machines were infected 18 to 24 months earlier--before the IPS and other security measures were installed. It appeared that UW Medicine, part of the University of Washington, had been attacked by resource hogs--... Access >>>
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