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Virus:Worm/Palevo.aabu
Date discovered:01/10/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Medium
Damage Potential:Low to medium
Static file:Yes
File size:94.208 Bytes
MD5 checksum:27cd93c97755a0f0a08cce4b9969dc75
VDF version:7.10.05.133
IVDF version:7.10.12.111 - Friday, October 1, 2010

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


Aliases:
   •  Mcafee: W32/Palevo
   •  Sophos: Mal/Palevo-A
   •  Bitdefender: Trojan.Generic.5222474
   •  Panda: W32/P2Pworm.OY
   •  Eset: Win32/Peerfrag.FD
   •  GData: Trojan.Generic.5222474


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


Side effects:
   • Drops malicious files
   • Registry modification
   • Steals information

 Files It copies itself to the following locations:
   • %recycle bin%\%CLSID%\syscr.exe
   • %drive%\RECYCLER\autorun.exe



The following files are created:

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

 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%\syscr.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:

– 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:
The following:
   • ms.mobilerequ**********.com:1863 (UDP)


 Stealing It tries to steal the following information:
– Recorded passwords used by the AutoComplete function

– Passwords from the following programs:
   • Mozilla Firefox
   • Internet Explorer

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

    Process name:
   • explorer.exe


 Miscellaneous Mutex:
It creates the following Mutex:
   • o4gmd1

 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 Tuesday, March 15, 2011
Description updated by Petre Galan on Tuesday, March 15, 2011

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