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Virus:Worm/Palevo.pil
Date discovered:02/02/2010
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:221.703 Bytes
MD5 checksum:989634d35040f014c818bd1c219ee146
IVDF version:7.10.03.166 - Tuesday, February 2, 2010

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


Aliases:
   •  Sophos: Mal/Wintrim-A
   •  Panda: W32/P2PWorm.DS
   •  Eset: Win32/Peerfrag.GA
   •  Bitdefender: Trojan.Inject.WN


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


Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %drive%\RECYCLER\%CLSID%\nissan.exe



The following files are created:

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

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



It tries to executes the following file:

– Filename:
   • "%malware execution directory%\%executed file%"

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

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

– sandra.pr**********.com on UDP port 31000
– pica.ba**********.ru on UDP port 31000
– l33t.br**********.net on UDP port 31000

 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.

Açıklamayı yerleştiren Petre Galan tarihinde 9 Nisan 2010 Cuma
Açıklamayı güncelleyen: Petre Galan tarihinde 12 Nisan 2010 Pazartesi

Geri . . . .
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