TROJ_GATAK.BJ

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

Other System Modifications

This Trojan adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Skype = ""%Application Data%\Skype\Phone\Skype.exe" /nosplash /minimized"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
googletalk = ""%Application Data%\Google Talk\googletalk.exe" /autostart"

Dropping Routine

This Trojan drops the following files:

• %Application Data%\Skype\Phone\Skype.exe
• %Application Data%\Google Talk\googletalk.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Other Details

This Trojan drops the following file(s)/component(s):

• %Application Data%\Microsoft\{random folder name}\{random file name} - encrypted

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

It deletes itself after execution.