6/22: Agent.GUK Trojan May be Bundled With Malware Packages
This memory-resident Trojan may be downloaded from remote sites by other malware.
When executed, it drops its component .DLL file, which Trend Micro also detects as TROJ_AGENT.GUK.
It then attempts to access a certain Web site to download files. As of this writing, however, the said site is inaccessible.
Technical details can be found at this Trend Micro page.