Sophos

Troj/Agent-FZO

Aliases
  • Trojan-Downloader.Win32.Agent.byh
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 22 August 2007 02:25:12 (GMT)
Detected by All Sophos products

Action

More Information

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

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

When first run Troj/Agent-FZO copies itself to <Windows>\BillGatesLoh.exe and creates the file <System>\<Random Digits>.dll. This file is clean and can be safely deleted.

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

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
BillGatesLoh.exe
<Windows>\BillGatesLoh.exe

The following registry entry is created in order to bypass the Windows firewall:

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\
<Original Filename>
<Original Filename>:*:Enabled:BillGatesLoh.exe

The following registry entry is set:

HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer
LogonScript
<System>\<Random Digits>.dll

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