Sophos

W32/Sohana-BB

Aliases
  • Win32/Sohanad.NCA worm
Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from August 2008 (4.32)
Protection available since 23 June 2008 15:59:22 (GMT)
Detected by All Sophos products

Action

More Information

W32/Sohana-BB is a worm for the Windows platform.

W32/Sohana-BB includes functionality to access the internet and communicate with a remote server via HTTP.

When first run W32/Sohana-BB copies itself to:

<Windows>\regsvr.exe
<System>\regsvr.exe
<System>\winhelp.exe

and creates the following files:

<System>\setting.ini
<System>\setup.ini
<Windows>\winhelp.ini

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

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Yahoo Messengger
<System>\regsvr.exe

The following registry entry is changed to run winhelp.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
System
Winhelp.exe

The following registry entry is set, disabling system software:

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

Registry entries are set as follows:

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

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableTaskMgr
0

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Shell
Explorer.exe rundll.exe

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