Worm/AutoIt.BEK - Worm

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Summary

Full description

Statistics

Virus:	Worm/AutoIt.BEK
Date discovered:	29/10/2008
Type:	Worm
In the wild:	Yes
Reported Infections:	Low
Distribution Potential:	Low to medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	387.584 Bytes
MD5 checksum:	c718e513f104913699362bd588364363
IVDF version:	7.01.00.09 - Wed, 29 Oct 2008 08:36 (GMT+1)

General Method of propagation:
   • Autorun feature

Aliases:
   • Mcafee: W32/YahLover.worm.gen virus
   • Sophos: Mal/Generic-A
   • Panda: W32/Autorun.IOI
   • Eset: Win32/AutoRun.WJ
   • Bitdefender: Trojan.Generic.326271

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Drops malicious files
   • Lowers security settings
   • Registry modification

Files It copies itself to the following locations:
   • %drive%\logoneui.exe
   • %WINDIR%\web\connection.dat
   • %SYSDIR%\logoneui.exe
   • %drive%\Jojo.exe
   • %drive%\Zidan vs Tito.exe
   • %drive%\Maradona.exe
   • %drive%\%all directories%\%directory name%.exe

It deletes the following file:
   • C:\boot.ini

The following files are created:

– %drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

– %WINDIR%\Tasks\At1.job
– %drive%\info.bat
– %SYSDIR%\autorun.ini
– %SYSDIR%\boote\boot.ini

Registry One of the following values is added in order to run the process after reboot:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "firewall 2008"="%SYSDIR%\logoneui.exe"

The following registry keys are added:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
   • "DisableRegistryTools"=dword:0x00000001
   • "DisableTaskMgr"=dword:0x00000001

– [HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel]
   • "HomePage"="1"

The following registry keys are changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   New value:
   • "Shell"="Explorer.exe logoneui.exe"

– [HKCU\Software\Microsoft\Internet Explorer\Main]
   New value:
   • "Start Page"="http://famous2.topcities.com"

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "Hidden"=dword:0x00000000

– [HKLM\SYSTEM\CurrentControlSet\Services\Schedule]
   New value:
   • "AtTaskMaxHours"=dword:0x00000000
   • "NextAtJobId"=dword:0x00000002

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
   New value:
   • "NofolderOptions"=dword:0x00000001

File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

See a brief description here.

Description inserted by Petre Galan on Fri, 05 Mar 2010 17:07 (GMT+1)
Description updated by Petre Galan on Fri, 05 Mar 2010 17:13 (GMT+1)

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