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Virus:Worm/Palevo.AC
Date discovered:15/02/2010
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:184.832 Bytes
MD5 checksum:c4358c82de2bedfc1b421024a3c68f74
IVDF version:7.10.04.71 - Monday, February 15, 2010

 General Method of propagation:
    Autorun feature


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%\nissan.exe



The following files are created:

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

 Registry One of the following values is added in order to run the process after reboot:

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



The following registry key is changed:

[HKEY_USERS\S-1-5-21-2025429265-1425521274-839522115-1003\Software\
   Microsoft\Internet Explorer\Toolbar]
   New value:
   • "Locked"=dword:0x00000000

 Backdoor The following ports are opened:

pica.ba**********.ru on UDP port 34000
sandra.pr**********.com on UDP port 34000
l33t.br**********.net on UDP port 34000

 Injection – It injects itself as a 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 Wednesday, February 24, 2010
Description updated by Petre Galan on Thursday, February 25, 2010

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