Sophos

VBS/Edibara-B

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Included in our products from October 2008 (4.34)
Protection available since 20 December 2007 18:16:09 (GMT)
Last updated 14 August 2008 23:53:03 (GMT)
Detected by All Sophos products

Action

More Information

VBS/Edibara-B is a Visual Basic script virus.

The virus drops the following files:

<System32>\TPS32E.dll
<System32>\TPS32V.dll
<System32>\Systemv.dll
<System32>\config\Netlogon.vbs
<System32>\dd.txt
<System32>\se3gl9km.bat
<System32>\NetLogon.exe

The NetLogon.vbs script attempts to modify htm, html and htt files on fixed and remote drives to include a segment of Visual Basic script which infects other systems which read the infected files.

The script creates the following registry entry:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
ComService
<pathname to NetLogon.vbs file>

The NetLogon.exe file is initially droped as <System32>\Demon and then copied to <System32>\NetLogon.exe.

The NetLogon.exe file includes functionality to download, install and run new software.

The following registry entries are created to run the NetLogon.exe file on startup:

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
(default)
<pathname of NetLogon.exe file>

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
(default)
<pathname of NetLogon.exe file>

The NetLogon.exe file changes settings for Microsoft Internet Explorer by modifying values under:

HKCU\Software\Microsoft\Internet Explorer\Main\

The NetLogon.exe file creates registry entries are set as follows:

HKCU\Software\Microsoft\Internet Explorer
Download Directory
<System>\drivers

HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL
(default)
1

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL
CheckedValue
0


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