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Virus:TR/Sisron.A.664
Date discovered:21/06/2011
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:17.408 Bytes
MD5 checksum:08a607c85c5b110240ba3e8b4602a78e
VDF version:7.11.10.61 - Tuesday, June 21, 2011
IVDF version:7.11.10.61 - Tuesday, June 21, 2011

 General Methods of propagation:
   • Messenger
   • Peer to Peer


Aliases:
   •  Kaspersky: Trojan-GameThief.Win32.OnLineGames.vst
   •  Bitdefender: Trojan.Agent.ARUP
   •  GData: Trojan.Agent.ARUP
   •  DrWeb: Trojan.Siggen2.36724


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


Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %WINDIR%\runddl32.exe

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "winsock startup"="runddl32.exe"

 P2P It searches for the following directories:
   • %PROGRAM FILES%\winmx\shared\
   • %PROGRAM FILES%\tesla\files\
   • %PROGRAM FILES%\limewire\shared\
   • %PROGRAM FILES%\morpheus\my shared folder\
   • %PROGRAM FILES%\emule\incoming\
   • %PROGRAM FILES%\edonkey2000\incoming\
   • %PROGRAM FILES%\bearshare\shared\
   • %PROGRAM FILES%\grokster\my grokster\
   • %PROGRAM FILES%\icq\shared folder\
   • %PROGRAM FILES%\kazaa lite k++\my shared folder\
   • %PROGRAM FILES%\kazaa lite\my shared folder\
   • %PROGRAM FILES%\kazaa\my shared folder\

   If successful, the following files are created:
   • DivX 5.0 Pro KeyGen.exe CSS Hack.exeFree POrn.exeporn lots of
      pics.exeFree cs hacks.exechild porn.exehack msn.exehow to
      hack.exehardcore XXX porn.exesims full.exeall sims games.exeLimeWire
      Pro.exebearshare full version.exesteam crack.exekeygen.exebf2
      full.exebf2 keygen.execsshack.exe; Counter-Strike KeyGen.exe; IP
      Nuker.exe; Website Hacker.exe; Keylogger.exe; AOL Password
      Cracker.exe; ICQ Hacker.exe; AOL Instant Messenger (AIM) Hacker.exe;
      MSN Password Cracker.exe; Microsoft Visual Studio KeyGen.exe;
      Microsoft Visual Basic KeyGen.exe; Microsoft Visual C++ KeyGen.exe;
      Sub7 2.3 Private.exe; sdbot with NetBIOS Spread.exe; L0pht 4.0 Windows
      Password Cracker.exe; Windows Password Cracker.exe; NetBIOS
      Cracker.exe; NetBIOS Hacker.exe; DCOM Exploit.exe; Norton Anti-Virus
      2005 Enterprise Crack.exe; Hotmail Cracker.exe; Hotmail Hacker.exe;
      Brutus FTP Cracker.exe; FTP Cracker.exe; Password Cracker.exe;
      Half-Life 2 Downloader.exe; UT 2003 KeyGen.exe; Windows 2003 Advanced
      Server KeyGen.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.

 Miscellaneous Mutex:
It creates the following Mutex:
   • asdfgh45gf

 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 Wednesday, July 20, 2011
Description updated by Petre Galan on Wednesday, July 20, 2011

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