Sophos

Troj/Mbroot-A

Aliases
  • Trojan.Mebroot
  • rojan.Win32.Agent.dsj
  • TROJ_AGENT.APA
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Web downloads
Affected operating systems Windows
Included in our products from March 2008 (4.27)
Protection available since 9 January 2008 19:23:34 (GMT)
Detected by All Sophos products

More Information

Trojan/Mbroot-A is a Trojan that infects Master Boot Record code in a fashion similar to DOS boot sector viruses.

The code installed in the MBR is used to install a rootkit in an early stage of the bootup process. The rootkit hides the presence of malware on the system.

Troj/Mbroot-A includes functionality to access the internet and communicate with a remote server via HTTP.

When Troj/Mbroot-A is installed it creates the file <Temp>\cln2.tmp. The file cln2.tmp is detected as Mal/Sinowa-A.

Sophos's anti-virus products include Behavioral Genotype" Protection,which can proactively guard against new threats without requiring an update. Sophos customers have been protected against Troj/Mbroot-A (detected as Mal/Sinowa-A) since version 4.25.

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