Sophos

W32/Sohana-P

Aliases
  • Win32/Sohanad.AE
  • worm
  • WORM_SOHANAD.AA
  • IM-Worm.Win32.Sohanad.ae
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
  • Chat programs
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 23 March 2007 19:53:09 (GMT)
Detected by All Sophos products
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Action

More Information

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

W32/Sohana-P spreads through instant messaging applications and network shares.

W32/Sohana-P includes functionality to download, install and run new software.

When W32/Sohana-P is installed the following files are created:

<System>\svchost.exe
<System>\svchost32.exe

The following registry entries are created to run W32/Sohana-P on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Task Manager
<System>\svchost.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Yahoo Messenger
<System>\svchost32.exe

W32/Sohana-P changes settings for Microsoft Internet Explorer by modifying values under:

HKCU\Software\Microsoft\Internet Explorer\Main\Start Page

The following registry entries are set, disabling system software:

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

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

Registry entries are set as follows:

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

HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel
Homepage
1

Registry entries are created under:

HKCU\Software\Yahoo\pager\View\YMSGR_Launchcast
HKCU\Software\Yahoo\pager\View\YMSGR_buzz

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