Sophos

Troj/Agent-GSG

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 13 March 2008 13:19:24 (GMT)
Detected by All Sophos products
  • Endpoint Security and Control 9.0
  • Small business solutions 4.0

Action

More Information

Troj/Agent-GSG is a Trojan for the Windows platform.

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

When Troj/Agent-GSG is installed the following files are created:

<User>\Local Settings\Application Data\spool.exe
<Temporary Internet Files>\Content.IE5\od6fwfox\getupdate[1].htm
<Temporary Internet Files>\Content.IE5\od6fwfox\webbibleschool[1].htm
<System>\drivers\ctfmon.exe

The following registry entries are created to run Troj/Agent-GSG on startup:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
autoload
<User>\Local Settings\Application Data\spool.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
ntuser
<System>\drivers\ctfmon.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
autoload
<User>\Local Settings\Application Data\spool.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
ntuser
<System>\drivers\ctfmon.exe

The file <System>\drivers\ctfmon.exe is registered as a service named "Schedule" (replacing any existing services named "Schedule"). Registry entries are created or modified under:

HKLM\SYSTEM\CurrentControlSet\Services\Schedule

The following registry entry is set:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
UIHost
logonui.exe

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