Sophos

W32/Xorer-D

Aliases
  • W32.Pagipef.B
  • Win32.Xorer.ej
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Removable storage devices
Affected operating systems Windows
Characteristics
  • Drops more malware
  • Installs itself in the registry
Included in our products from June 2008 (4.30)
Protection available since 17 April 2008 05:56:48 (GMT)
Detected by All Sophos products

Action

More Information

W32/Xorer-D is a worm for the Windows platform.

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

When first run W32/Xorer-D creates the following files:

<Root>\AUTORUN.INF - detected as W32/Xorer-A
<Root>\pagefile.pif - detected as W32/Xorer-D
<Root>\<random nubmer>.log - detected as W32/Xorer-D
<System>\<random nubmer>.log - detected as W32/Xorer-D
<System>\dnsq.dll - Mal/Emogen-Y
<System>\Com\lsass.exe - detected as W32/Xorer-D
<System>\Com\netcfg.000 - detected as W32/Xorer-C
<System>\Com\netcfg.dll - detected as W32/Xorer-C
<System>\Com\smss.exe - detected as W32/Xorer-B

W32/Xorer-D creates a COM object for the file netcfg.dll, creating registry entries under:

HKCR\CLSID\{450EC9C4-0F7F-B084-D1147FE9DDCC}

The file NetApi000.sys is registered as a new system driver service named "NetApi000", with a display name of "NetApi000". Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\NetApi000

Registry entries are set as follows:

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

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden
Type
radio

W32/Xorer-D attempts to spread to removable media drives by copying AUTORUN.INF and pagefile.pif to the root folder of inserted drives.

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