BKDR_DARKMOON.DO

This backdoor arrives as attachment to mass-mailed email messages.

It does not have any propagation routine.

It does not have any downloading capability.

It does not have any information-stealing capability.

It deletes the initially executed copy of itself.

Arrival Details

This backdoor arrives as attachment to mass-mailed email messages.

Installation

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

• %System%\Kexlivemx.exe (if not logged in as an administrator)
• %System%:Kexlivemx.exe (if logged in as an administrator)

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

It injects itself into the following processes running in the affected system's memory:

• explorer.exe

It adds the following mutexes to ensure that only one of its copies runs at any one time:

• b77v77d28

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Kexlive Uplivefile = "%System%:Kexlivemx.exe" or "%System%\Kexlivemx.exe"

Propagation

This backdoor does not have any propagation routine.

Download Routine

This backdoor does not have any downloading capability.

Information Theft

This backdoor does not have any information-stealing capability.

Other Details

This backdoor deletes the initially executed copy of itself

NOTES:

This backdoor starts a hidden default browser. It injects codes in the hidden default browser to perform its backdoor routines.

It connects to send.{BLOCKED}00.com or hk.{BLOCKED}00.com at port 443 to receive binary instructions. It then executes the binary instructions.