Sophos

Troj/Bagle-TH

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Drops more malware
  • Installs itself in the registry
Included in our products from February 2008 (4.26)
Protection available since 5 December 2007 16:47:37 (GMT)
Detected by All Sophos products

Action

More Information

Troj/Bagle-TH is a Trojan for the windows platform.

Troj/Bagle-TH pretends to be a software crack. When first run it pops up a window asking the user to locate the program to crack. Once the user selects a program the Tojan will return a message saying "Error. Incorrect file version". It also creates a registry entry under

HKCU\Software\FirstRRRun

Troj/Bagle-TH copies itself under <System>\drivers under the name "hidr.exe". It also changes the <System>\drivers folder attributes to hidden.

Troj/Bagle-TH tries to copy itself to <Program Files>\Messenger\msmsgs.exe. If Windows Messenger exists it will overwrite it.

Troj/Bagle-TH drops a rootkit under <System>\drivers\srosa.sys . The dropped file hides the Trojan. This file is also detected as Troj/Bagle-TH.

Troj/Bagle-TH attempts to access a list of hosts on the Internet.

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