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Date discovered:16/02/2011
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:26.624 Bytes
MD5 checksum:2089b0f682a8fcd79665a9644150998b
VDF version:
IVDF version:

 General Method of propagation:
   • Autorun feature

   •  Mcafee: Artemis!2089B0F682A8
   •  Kaspersky: Trojan.Win32.Cossta.lzr
   •  Bitdefender: Trojan.Generic.5229936
   •  Panda: Bck/Hupigon.LLS
   •  GData: Trojan.Generic.5229936

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

Side effects:
   • Drops malicious files
   • Registry modification
   • Makes use of software vulnerability
      •  CVE-2007-1204
      •  MS07-019

 Files It copies itself to the following locations:
   • %HOME%\Application Data\engel\updates.exe
   • %drive%\mousedriver.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:
   • %SYSDIR%\netsh.exe" advfirewall firewall add rule name="%executed file%" dir=in action=allow program="%malware execution directory%\%executed file%"

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

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

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

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\
   • "EnableFirewall"=dword:0x00000000

The following registry key is added:

– [HKCU\Software\Microsoft\Internet Explorer\Main]
   • "DHCP"="1973614"
   • "DNS"=""

 Injection – It injects a backdoor routine into a process.

    Process name:
   • netsh.exe

 Miscellaneous Accesses internet resources:

It creates the following Mutex:
   • Ms32Dll

 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 Tuesday, April 19, 2011
Description updated by Petre Galan on Tuesday, April 19, 2011

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