Worm/Palevo.AC - Worm

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Full description

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

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.

See a brief description here.

Inserted by Petre Galan on Wed, 24 Feb 2010 16:07 (GMT+1)
Updated by Petre Galan on Thu, 25 Feb 2010 07:43 (GMT+1)

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Worm/Palevo.AC - Worm

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