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Virus:TR/Dldr.iBill.BI
Date discovered:05/11/2008
Type:Trojan
Subtype:Downloader
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:24.576 Bytes
MD5 checksum:f5d072098fdd5b46b22b54caf9dd55a8
IVDF version:7.01.00.40

 General Method of propagation:
   • Autorun feature


Aliases:
   •  Panda: W32/Auraax.A.worm
   •  Eset: Win32/AutoRun.Agent.AO
   •  Bitdefender: Win32.Worm.Autorun.OH


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


Side effects:
   • Downloads a malicious file
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following locations:
   • %PROGRAM FILES%\Microsoft Common\svchost.exe
   • %drive%\system.exe



The following file is created:

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




It tries to download some files:

– The locations are the following:
   • http://cjusbciw123.com/**********?v=1&rs=544453496&n=1&uid=1
   • http://univnext.cn/**********?v=1&rs=544453496&n=1&uid=1
At the time of writing this file was not online for further investigation.

 Registry The following registry key is added:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\explorer.exe]
   • "Debugger"="%PROGRAM FILES%\Microsoft Common\svchost.exe"

 Injection – It injects itself as a thread into a process.

    All of the following processes:
   • svchost.exe
   • explorer.exe


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

Description inserted by Petre Galan on Friday, February 26, 2010
Description updated by Petre Galan on Monday, March 1, 2010

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