F-Secure Virus Descriptions : Glieder.H

[Summary] | [Detailed Description] | [Detection]

NAME:	Glieder.H
ALIAS:	Trojan.Win32.Glieder.h, W32/Glieder.H
ALIAS:	TrojanDropper.Win32.Small.kv, TrojanDownloader.Win32.Agent.cj

Summary

We have received samples of Glieder.H variant late on August 31st 2004. Originally it was detected by us as 'Bagle.AK', but then the name was changed to 'Glieder.H'. The origin was an e-mail message that was spammed to numerous people. The e-mail contains an archive named FOTO.ZIP. Inside there's an HTML file and an EXE file named FOTO1.EXE.

Detailed Description

This FOTO1.EXE file that was spammed in e-mails is a dropper. It drops and activates a DLL component that kills processes belonging to updating components of several anti-virus programs:

 ATUPDATER.EXE
 AUPDATE.EXE
 AUTOTRACE.EXE
 AUTOUPDATE.EXE
 FIREWALL.EXE
 ATUPDATER.EXE
 LUALL.EXE
 DRWEBUPW.EXE
 AUTODOWN.EXE
 NUPGRADE.EXE
 OUTPOST.EXE
 ICSSUPPNT.EXE
 ICSUPP95.EXE
 ESCANH95.EXE
 AVXQUAR.EXE
 ESCANHNT.EXE
 UPGRADER.EXE
 AVXQUAR.EXE
 AVWUPD32.EXE
 AVPUPD.EXE
 CFIAUDIT.EXE
 UPDATE.EXE
 NUPGRADE.EXE
 MCUPDATE.EXE

Then it attempts to download to download a file from several websites. The list of URLs is hardcoded in the program's body.

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Detection

F-Secure Anti-Virus detects Glieder.H starting from the following update:

[FSAV_Database_Version]

Version=2004-08-31_03

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Writeup: Alexey Podrezov; August 31st, 2004;

Technical Details: Tzvetan Chaliavski; September 1st, 2004;

F-Secure Corporation