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Virus:Worm/Palevo.vsv
Date discovered:05/03/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:71.680 Bytes
MD5 checksum:ac20bf7ee9129a1a1d90a729dfee69b9
IVDF version:7.10.04.233 - Friday, March 5, 2010

 General Method of propagation:
   • Messenger


Aliases:
   •  Sophos: W32/Autorun-BBI
   •  Bitdefender: Worm.Generic.231659
   •  Panda: W32/Koobface.JK
   •  Eset: Win32/Boberog.AK


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


Side effects:
   • Third party control
   • Lowers security settings
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %WINDIR%\msnmgr.exe



The following file is created:

– C:\a.txt



It tries to execute the following file:

– Filename:
   • "%WINDIR%\msnmgr.exe"

 Registry It creates the following entry in order to bypass the Windows XP firewall:

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile\AuthorizedApplications\List]
   • "%executed file%"="%executed file%:*:Enabled:Userinit"



The following registry key is changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   New value:
   • "Userinit"="%SYSDIR%\userinit.exe,%WINDIR%\msnmgr.exe"

 Messenger It is spreading via Messenger. The characteristics are described below:

– Windows Live Messenger
– Yahoo Messenger


Message

   • seen this?? :D
     poglej to fotografijo :D
     pogled na ovu fotografiju :D
     titta p
      min bild :D
     shikoni n
      k
      foto :D
     pozrite sa na t
     to fotografiu :D
     uita-te la aceasta fotografie :D
     katso t
      kuvaa :D
     bu resmi bakmak :D
     olhar para esta foto :D
     spojrzec na to zdjecie :D
     se p
      dette bildet :D
     zd meg a k
     pet :D
     ser p
      dette billede :D
     pod
     vejte se na mou fotku :D
     guardare quest'immagine :D
     look at this picture :D
     bekijk deze foto :D
     mira esta fotograf
     a :D
     schau mal das foto an :D
     regardez cette photo :D

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.

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: b.msn**********.org
Channel: #bb#
Nickname: n[USA|XP]%number%

 Miscellaneous Mutex:
It creates the following Mutex:
   • SN5JSN868L

 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 Thursday, October 21, 2010
Description updated by Petre Galan on Thursday, October 21, 2010

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