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Virus:Worm/Palevo.igb
Date discovered:20/07/2009
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:131.072 Bytes
MD5 checksum:dc93d1f2fe8dc25a0ab091334549d08a
VDF version:7.01.05.06

 General Method of propagation:
   • Autorun feature
   • Messenger
   • Peer to Peer


Aliases:
   •  Panda: W32/Autorun.JFG.worm
   •  Eset: Win32/Peerfrag.CF


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


Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following locations:
   • %recycle bin%\%CLSID%\nissan.exe
   • %drive%\info\fortuna.exe



The following file is created:

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

%drive%\RECYCLER\%CLSID%\Desktop.ini
%drive%\info\Desktop.ini

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

–  [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Taskman"="%recycle bin%\%CLSID%\nissan.exe"



The following registry keys are added:

– [HKLM\SOFTWARE\HHC]
   • "Username"="moyasoha10"

– [HKEY_USERS\S-1-5-21-2025429265-1425521274-839522115-1003\Software\
   bcrypt]
   • "i"=dword:0x000007d9

 P2P In order to infect other systems in the Peer to Peer network community the following action is performed:   It retrieves shared folders by querying the following registry keys:
   • Software\Microsoft\Windows\CurrentVersion\Uninstall\eMule Plus_is1
   • Software\Kazaa\LocalContent
   • Software\eMule
   • Software\DC++
   • Software\Shareaza\Shareaza\Downloads
   • Software\BearShare\General
   • Software\iMesh\General
   • \Local Settings\Application Data\Ares\My Shared Folder

   If successful, the following file is created:
   • nissan.exe

   These files are copies of the malware itself.

 Messenger It is spreading via Messenger. The characteristics are described below:

– MSN Messenger

The URL then refers to a copy of the described malware. If the user downloads and executes this file the infection process will start again.

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

    Process name:
   • explorer.exe


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

Description inserted by Petre Galan on Monday, February 22, 2010
Description updated by Petre Galan on Tuesday, February 23, 2010

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