Full description

Virus:	Worm/Palevo.amyr
Date discovered:	22/06/2010
Type:	Worm
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	1.495.040 Bytes
MD5 checksum:	dc6c7a5da9145187c60374954359538c
IVDF version:	7.10.08.153 - Tuesday, June 22, 2010

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

Aliases:
   • Bitdefender: Trojan.Generic.4372066
   • Panda: W32/P2Pworm.MW
   • Eset: Win32/Agent.RKD

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

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

Files It copies itself to the following locations:
   • %drive%\U3ROM\flyhigh.exe
   • %recycle bin%\%CLSID%\recycle.exe

It deletes the initially executed copy of itself.

It deletes the following file:
   • %recycle bin%\%CLSID%\Desktop.ini

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%

– %ALLUSERSPROFILE%\Application Data\TEMP:ABA49B0C
– %temporary internet files%\830[1].exe
– %HOME%\Application Data\vfbu.exe
– %TEMPDIR%\686.exe

It tries to download a file:

– The location is the following:
   • http://193.252.122.54/campingmanucrots/images/miniaturphil/**********

It tries to executes the following file:

– Filename:
   • %TEMPDIR%\686.exe

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

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
• "Taskman"="%HOME%\Application Data\vfbu.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 Live 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:

– upd**********.com on UDP port 7008
– upd**********.net on UDP port 7008
– liv**********.com on UDP port 7008

Injection – It injects itself as a remote 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 8 Eylül 2010 Çarşamba
Description updated by Petre Galan on 8 Eylül 2010 Çarşamba

Geri . . . .

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