Need help? Ask the community or hire an expert.
Go to Avira Answers
Virus:Worm/Palevo.atln
Date discovered:04/01/2011
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Medium
Damage Potential:Low to medium
Static file:Yes
File size:176.128 Bytes
MD5 checksum:c044cf0eb2d779067c4549a1ba836b04
VDF version:7.10.07.145
IVDF version:7.11.01.20 - Tuesday, January 4, 2011

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


Aliases:
   •  Bitdefender: Worm.Generic.283831
   •  Panda: W32/P2Pworm.OY
   •  Eset: Win32/Peerfrag.FL


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


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

 Files It copies itself to the following locations:
   • %recycle bin%\%CLSID%\yv8g67.exe
   • %drive%\Docs\print.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%




It tries to download some files:

The location is the following:
   • http://91.121.175.219:50215/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Dropper.Gen


The location is the following:
   • http://91.121.175.219:50215/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Dropper.Gen


The location is the following:
   • http://93.115.241.34:26352/**********
It is saved on the local hard drive under: %TEMPDIR%\%number%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Dropper.Gen

 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%\yv8g67.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


 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 Contact server:
All of the following:
   • f5v**********.com:443 (UDP)
   • f5v**********.com:5190 (UDP)


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

    Process name:
   • explorer.exe


 Miscellaneous Mutex:
It creates the following Mutex:
   • pphphphllhizjhk2345

 File details Programming language:
The malware program was written in MS Visual C++.


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 Wednesday, February 9, 2011
Description updated by Petre Galan on Friday, February 11, 2011

Back . . . .