TSPY_ZBOT.MXT

This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It deletes itself after execution.

Arrival Details

This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This spyware drops a copy of itself in the following folders using different file names:

• %Application Data%\Microsoft\{Random Folder}\{Random filename}.exe

(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 spyware modifies the following registry entry(ies) to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
ctfmon.exe = %Application Data%\Microsoft\{Random Folder}\{Random filename}.exe \%system%\ctfmon.exe

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
bitgz = %Application Data%\Microsoft\{Random Folder}\{Random filename}.exe

Other Details

This spyware deletes itself after execution.