TR/Autorun.S - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Autorun.S
Date discovered:	21/08/2007
Type:	Trojan
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Low to medium
Damage Potential:	Medium to high
Static file:	Yes
File size:	94.208 Bytes
MD5 checksum:	75691359d5c9e0e7e09ce6cd1802bc31
IVDF version:	6.39.01.26 - Tue, 21 Aug 2007 09:11 (GMT+1)

General Method of propagation:
   • Mapped network drives

Aliases:
   • Mcafee: W32/Autorun.worm.i.gen
   • Kaspersky: Worm.Win32.AutoRun.wj
   • F-Secure: Worm.Win32.AutoRun.wj
   • Sophos: W32/SillyFDC-BJ
   • Eset: Win32/AutoRun.LG
   • Bitdefender: Trojan.Autorun.VN

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

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

Right after execution the following information is displayed:

Right after execution it runs a windows application which will display the following window:

Files It copies itself to the following locations:
   • C:\Documents and Settings\LocalService\services.exe
   • %SYSDIR%\drivers\smss.exe
   • %WINDIR%\winlogon.exe
   • %drive%:\RECYCLER.exe
   • %drive%:\Gwen(ISU) Scandal.exe
   • %drive%:\Sex Video.exe
   • %drive%:\zeluR maeTCP.exe
   • %all directories%\%current directory name%.exe

It renames the following files:

    • %SYSDIR%\hal.dll into FuckUHal
    • %WINDIR%\explorer.exe into FuckU
    • %SYSDIR%\dllcache into FuckU
    • %SYSDIR%\shell32.dll into FuckU1
    • %SYSDIR%\ntoskrnl.dll into FuckU2

The following files are created:

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

It tries to executes the following file:

– Filename:
   • %PROGRAM FILES%\Windows Media Player\wmplayer.exe

Registry The following registry key is added in order to run the process after reboot:

– [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
   • winlogon = %WINDIR%\winlogon.exe

The following registry key is changed:

Various Explorer settings:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • HideFileExt = 1
   • SuperHidden = 1
   • ShowSuperHidden = 0

File details Programming language:
The malware program was written in Visual Basic.

See a brief description here.

Description inserted by Andrei Gherman on Wed, 06 Aug 2008 13:44 (GMT+1)
Description updated by Andrei Gherman on Wed, 06 Aug 2008 14:23 (GMT+1)

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