Sophos

Troj/Agent-GCA

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from October 2007 (4.22)
Protection available since 31 August 2007 18:07:16 (GMT)
Detected by All Sophos products

Action

More Information

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

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

<Temp>\winlogon.exe
<System>\DefLib.sys

The file winlogon.exe is detected as Troj/Agent-GCA.
The file DefLib.sys is detected as Troj/NtRootK-CA.
These files may be hidden when the SYS file is properly installed.

The file DefLib.sys is registered as a new system driver service named "SysLibrary". Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\SysLibrary

Troj/Agent-GCA changes settings for Microsoft Internet Explorer by modifying values under:

HKCU\Software\Microsoft\Internet Explorer\Security\

Registry entries are set as follows:

HKCU\Software\Microsoft\Internet Explorer\Desktop
host
66.232.98.112

HKCU\Software\Microsoft\Internet Explorer\Desktop
id
317836717252

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