Troj/Lager-S

Aliases	TROJ_LAGER.ES
Category	Viruses and Spyware
Type	Trojan
What to do	If you've received an alert for a virus or spyware, then follow the instructions for removing the threat.
Prevalence	low high

Summary


Affected operating systems	Windows
Characteristics	Drops more malware Installs itself in the registry
Included in our products from	February 2007 (4.14)
Protection available since	21 November 2006 16:57:38 (GMT)
Last updated	12 December 2006 13:41:57 (GMT)
Detected by	All Sophos products

Troj/Lager-S is an email-relaying Trojan for the Windows platform.

Troj/Lager-S can be used to send spam. The content of the messages it sends is downloaded from a preconfigured website.

When first run Troj/Lager-S copies itself to <System>\taskdir.exe and creates the following files:

<System>\adir.dll
<System>\zlbw.dll

The file adir.dll is detected as Troj/HideDl-B.
The file zlbw.dll is not malicious and can be safely deleted.

The following registry entry is created to run taskdir.exe on startup:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
taskdir
<System>\taskdir.exe

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