BKDR_SDBOT.BQJ

This backdoor creates folders where it drops its files.

It opens a hidden Internet Explorer window.

Installation

This backdoor drops the following copies of itself into the affected system:

• %system%\systems\scvhost.exe

It drops the following files:

• %Application Data%\addon.dat
• %system%\systems\klog.dat

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

Autostart Technique

This backdoor adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{EC235178-6003-647C-1931-2ED83B9C91E9}
stubpath = %system%\systems\scvhost.exe

Backdoor Routine

This backdoor opens a hidden Internet Explorer window.