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Virus:TR/Delfsnif.A.2
Date discovered:12/07/2011
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:658.432 Bytes
MD5 checksum:DF7BC7447218621DC038D00A8E2196B9
VDF version:7.11.11.93 - Tuesday, July 12, 2011
IVDF version:7.11.11.93 - Tuesday, July 12, 2011

 General Aliases:
   •  TrendMicro: Mal_OtorunN
   •  Sophos: Mal/Behav-043
   •  Microsoft: Trojan:Win32/Delfsnif


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows 7


Side effects:
   • Drops files
   • Registry modification

 Files It copies itself to the following location:
   • %SYSDIR%\system32.exe

 Registry One of the following values is added in order to run the process after reboot:

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "(Default)"="%executed file%"
   • "windows"="%SYSDIR%\system32.exe"

 File details Programming language:
The malware program was written in Delphi.


Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Andrei Ilie on Monday, October 17, 2011
Description updated by Andrei Ilie on Tuesday, October 18, 2011

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