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Virus:TR/Ircbrute.A.269
Date discovered:14/04/2010
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:184.322 Bytes
MD5 checksum:2e9e1cf38c29240ae56bb230549bcb26
IVDF version:7.10.06.72 - Wednesday, April 14, 2010

 General Aliases:
   •  Sophos: Mal/VBInject-D
   •  Panda: W32/ButterflyBot.B.worm
   •  Eset: Win32/Boberog.AK
   •  Bitdefender: Trojan.Generic.KD.5255


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


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

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



The following file is created:

– C:\a.txt



It tries to executes the following file:

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

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

Server: stores.del**********.net
Port: 1234
Channel: #dl#
Nickname: n[USA|XP]%number%

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

Description inserted by Petre Galan on Thursday, June 24, 2010
Description updated by Petre Galan on Thursday, June 24, 2010

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