Sophos

W32/SillyFD-AA

Aliases
  • Worm.Win32.VB.fw
  • W32/Sillyworm.WR
  • W32/Archiles.worm
  • WORM_VB.CNG
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Removable storage devices
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from June 2007 (4.18)
Protection available since 3 May 2007 06:07:24 (GMT)
Detected by All Sophos products

Action

More Information

W32/SillyFD-AA is a worm for the Windows platform.

Once installed W32/SillyFD-AA spreads through removable storage devices, including floppy drives and USB keys. The worm attempts to create a hidden file Autorun.inf on the removeable drive and copy itself to the removeable drive with the hidden filename <Root>\handydriver.exe.

The file <Root>\Autorun.inf is designed to start the worm once the removable drive is connected to a uninfected computer.

W32/SillyFD-AA copies itself to the following locations:
<Root>\kerneldrive.exe
<Windows>\regedit.exe
<Windows>\pchealth\helpctr\Binaries\msconfig.exe
<System>\systeminit.exe
<System>\wininit.exe
<System>\winsystem.exe
<System>\cmd.exe
<System>\taskmgr.exe


W32/SillyFD-AA also creates the following file <Root>\autorun.inf.

The following registry entries are set to run W32/SillyFD-AA to run itself on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Userinit
<System>\userinit.exe,<System>\systeminit.exe,

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


The following registry entries are also set:

HKCU\Software\Microsoft\Internet Explorer\Main
Window Title
Hacked by 1BYTE

HKCU\Software\Microsoft
ServicePack
1.2

HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer
SearchHidden
0

HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer
SearchSystemDirs
0

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
NoFolderOptions
1

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


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


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

HKCU\Software\Microsoft
nFlag
1


HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
Hidden
1

HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
HideFileExt
1

HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
ShowSuperHidden
0

HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
SuperHidden
1

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
NoDriveTypeAutoRun
0

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess
Start
1

RSS|Atom
Get reports about the latest virus and spyware threats delivered to your computer