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Virus:Worm/Silly_P2P.H.18
Date discovered:18/05/2011
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:19.968 Bytes
MD5 checksum:312df8a4b882c5650bf6d2bfdcafaa8a
VDF version:7.11.08.60 - Wednesday, May 18, 2011
IVDF version:7.11.08.60 - Wednesday, May 18, 2011

 General Methods of propagation:
   • Autorun feature
   • Messenger


Aliases:
   •  Kaspersky: Trojan.Win32.Scar.dpxd
   •  F-Secure: Trojan.Win32.Scar.dpxd
   •  Bitdefender: Trojan.Scar.M
   •  GData: Trojan.Scar.M
   •  DrWeb: BackDoor.IRC.Bot.804


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


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

 Files It copies itself to the following locations:
   • %HOME%\Application Data\svchosts.exe
   • %drive%\SYSTEM.EXE



The following file is created:

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




It tries to execute the following file:

– Filename:
   • %HOME%\Application Data\svchosts.exe /NEWSHIT

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Microsoft Corp"="%HOME%\Application Data\svchosts.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Microsoft Corp"="%HOME%\Application Data\svchosts.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\
   Run]
   • "Microsoft Corp"="%HOME%\Application Data\svchosts.exe"

 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.

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

Server: sku**********.info

 Miscellaneous Mutex:
It creates the following Mutex:
   • Xhdhds7d6fjsdhjs32

 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 Thursday, June 2, 2011
Description updated by Petre Galan on Thursday, June 2, 2011

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