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Virus:Worm/Palevo.rmm.8
Date discovered:15/02/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:43.008 Bytes
MD5 checksum:5e32a9355df329f04504aa2f0884ca4c
IVDF version:7.10.04.59 - Monday, February 15, 2010

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


Aliases:
   •  Mcafee: W32/Palevo
   •  Sophos: Troj/DelfInj-E
   •  Panda: W32/P2Pworm.GF
   •  Eset: Win32/Lethic.AA
   •  Bitdefender: Worm.Generic.227674


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


Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %recycle bin%\%CLSID%\psysnew.exe



The following files are created:

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

 Registry The following registry keys are added in order to run the processes after reboot:

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

[HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Shell"="explorer.exe,%recycle bin%\%CLSID%\psysnew.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "psysnew"="%recycle bin%\%CLSID%\psysnew.exe"

 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\BearShare\General
   • Software\iMesh\General
   • Software\Shareaza\Shareaza\Downloads
   • Software\Kazaa\LocalContent
   • Software\DC++
   • Software\eMule
   • Software\Microsoft\Windows\CurrentVersion\Uninstall\eMule Plus_is1

   It searches for directories that contain the following substring:
   • \Local Settings\Application Data\Ares\My Shared Folder


 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.

 Backdoor The following port is opened:

mails.pe**********.biz on TCP port 8800

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

    Process name:
   • 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, April 9, 2010
Description updated by Petre Galan on Monday, April 12, 2010

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