The Warp Trojan demonstrates a bold new method by which malware writers are forcing computers to visit their exploit sites on the Internet and recruit those systems into their army of compromised machines. Warp does this by becoming a network middleman, arranging for all local network traffic to flow through it, and then injecting a malicious URL into any passing web traffic.
This Trojan is particularly stealthy in that the injected HTML code is not obvious to the recipient of the compromised web page and should it be discovered, one would more likely conclude that the web-server itself was compromised, not that the flow of network traffic between the computers has been “Warped”. Finding the true source of that URL injection, the middle-man, on a larger network requires a network sniffer and the ability to identify the offending machine by its MAC address.