Sophos

Troj/Clunky-B

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Drops more malware
  • Installs itself in the registry
Protection available since 30 November 2005 14:10:55 (GMT)
Detected by All Sophos products
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Action

More Information

Troj/Clunky-B is a backdoor Trojan for the Windows platform.

Troj/Clunky-B opens up a backdoor port on the infected computer allowing unauthorized remote access. The Trojan can be used to download and run arbitrary files.

When first run Troj/Clunky-B copies itself to:

<System>\Microsoft\fixcomdos.exe
<System>\Microsoft\iexplore.exe

and creates the file <System>\wincontxt.dll. This is a clean data file, and may
safely be deleted.

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

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
SyncMon
<System>\microsoft\fixcomdos.exe

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