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Troj/Agent-GYO

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 8 May 2008 03:14:00 (GMT)
Detected by All Sophos products
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Action

More Information

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

When first run Troj/Agent-GYO copies itself to <System>\cftmon.exe and creates the following files:

<System>\mshdtxt32.dat
<System>\mshyta16.dll

The files mshyta16.dll and gbf1.tmp are detected as Troj/KeyLog-KB.

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

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
cftmon
<System>\cftmon.exe

The following registry entries are created to run code exported by mshyta16.dll on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\__A
DllName
<System>\mshyta16.dll

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\__A
Startup
fnGbf2

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\__A
Impersonate
0

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