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Virus:Worm/Palevo.ajyy
Date discovered:30/05/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Medium to high
Damage Potential:Low to medium
Static file:Yes
File size:159744 Bytes
MD5 checksum:392b608677b5a8b2cf7c47723e329577
VDF version:7.10.03.80
IVDF version:7.10.07.196 - Sunday, May 30, 2010

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


Aliases:
   •  Kaspersky: P2P-Worm.Win32.Palevo.ajyy
   •  TrendMicro: TROJ_FAKEAV.SMZW
   •  F-Secure: P2P-Worm.Win32.Palevo.ajyy
   •  Grisoft: Cryptic.PH
   •  Eset: Win32/Peerfrag.HH
     DrWeb: Trojan.Packed.20312


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


Side effects:
   • Drops a file
   • Registry modification

 Files It copies itself to the following location:
   • %HOME%\ctfmon.exe



The following files are created:

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

%recycle bin%\%CLSID%\Desktop.ini

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

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
   • "Taskman"="%HOME%\ctfmon.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\Kazaa\LocalContent
   • 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:

 Windows 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:

tinaiva**********.info on UDP port 51000
prop**********.ru 51000
takos**********.com 51000

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

    Process name:
   • explorer.exe


It is injected into all processes.



It injects itself as a remote thread into processes.

 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 Ana Maria Niculescu on Friday, October 15, 2010
Description updated by Ana Maria Niculescu on Monday, October 18, 2010

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