Need help? Ask the community or hire an expert.
Go to Avira Answers
Date discovered:07/04/2010
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:8.192 Bytes
MD5 checksum:5b80ab11e472cd8e26ef1ade5855e17e
VDF version:
IVDF version:

 General Method of propagation:
   • Autorun feature

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Drops files
   • Registry modification

 Files It copies itself to the following locations:
   • %drive%\Seguridad\@b@ddon.exe
   • C:\Seguridad\ctfmon.exe
   • C:\Bootfont.sys
   • %recycle bin%\Bootfont.sys

The following files are created:

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

%recycle bin%\boot.ini
%recycle bin%\AUTOEXEC.BAT
%recycle bin%\NTDETECT.COM
%recycle bin%\ntldr
%recycle bin%\CONFIG.SYS
%recycle bin%\IO.SYS
%recycle bin%\MSDOS.SYS

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

– [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
   • "index"="C:\Seguridad\ctfmon.exe"

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "index"="C:\Seguridad\ctfmon.exe"

The following registry keys are changed:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "Hidden"="2"
   • "HideFileExt"="Seguridad"

– [HKCU\SoftWare\Microsoft\Windows NT\CurrentVersion\Windows]
   New value:
   • "load"="C:\Seguridad\ctfmon.exe"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   New value:
   • "Shell"="Explorer.exe,C:\Seguridad\ctfmon.exe"

– [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   New value:
   • "Shell"="Explorer.exe,C:\Seguridad\ctfmon.exe"

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
   • UPX

Description inserted by Ana Maria Niculescu on Thursday, July 8, 2010
Description updated by Ana Maria Niculescu on Wednesday, July 14, 2010

Back . . . .