Detecting BBB/IRS/FTC/Proforma Trojan-Infected Users on Your Network

June 18th, 2007

We’ve gotten some inquiries as to how to find users infected by the recent BBB/IRS/FTC/Proforma trojan scams on corporate networks where an IDS/IPS device that can detect the exfiltration traffic might not be in play.

If you keep logs of firewall/proxy or DNS server traffic, you may be able to spot infected users by traffic analysis. This activity has been going on since at least February, so it is prudent to go back in the logfiles at least until the beginning of 2007 when searching.

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