Sophos

W32/USKAF-A

Aliases
  • Trojan.Win32.VB.abe
  • W32/Generic.m
  • WORM_USKAF.A
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Infected files
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from May 2006 (4.05)
Protection available since 9 March 2006 21:58:03 (GMT)
Detected by All Sophos products

Action

More Information

W32/USKAF-A is a worm for the Windows platform.

When first run W32/USKAF-A copies itself to

<Startup>\ImagViewer.exe
<Program Files>\GifAnimator.exe

and creates the file <Program Files>\Font1.Gif(harmless image file).

The worm may replace files with the following extensions with a copy of itself:

BMP
COM
GIF
JPG
LNK
MP3
PIF
PNG
SCR
TIF

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

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
ImagViewer
<Program Files>\GifAnimator.exe

The following registry entries are set, disabling the registry editor (regedit) and the Windows task manager (taskmgr):

HKCU\Software\Microsoft\Windows NT\CurrentVersion\Policies\System
DisableRegistryTools
1

HKCU\Software\Microsoft\Windows NT\CurrentVersion\Policies\System
DisableTaskMgr
1

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegistryTools
1

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableTaskMgr
1

Registry entries are created under:

HKCR\keyfile\shell\open\command\

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