Mitglieder.AI
Summary
A new Mitglieder proxy trojan appeared on April 7th 2004. It installs itself to system and works as a mail relay on port 14247. The trojan connects to several websites to report its port and ID. Similar Mitglieder trojan variants were dropped by certain Bagle worms in the past.
Removal
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Technical Details
The Mitglieder.AI's file is a PE executable 7824 bytes in size packed with FSG file compressor.
According to our partner, the trojan was spammed in email messages that had the following text:
We agree with your terms. The deal is acceptable. For more information please read attached document. Thank you. Lisa Marlow.
When the trojan's file is run, it copies itself as WINDOW.EXE file to Windows System folder and creates a startup key for this file in the Registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] "window.exe" = "%winsysdir%\window.exe"
where %winsysdir% represents Windows System folder name.
Then the trojan opens a backdoor on port 14247, listens for remote commands and works as a mail relay. The trojan connects to several websites to report infected computer's IP address, ID and proxy port.
This Mitglieder variant doesn't kill processes of security and anti-virus software.
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