BKDR_ANDROM.TF

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

Arrival Details

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

• {All User's Profile}\Local Settings\Temp\ms{random characters}.{extension name}
• {All User's Profile}\svchost.exe

It injects codes into the following process(es):

• wuauclt.exe

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
SunJavaUpdateSched = "{All User's Profile}\svchost.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
{random number} = "{All User's Profile}\Local Settings\Temp\ms{random characters}.{extension name}"

Other Details

This backdoor connects to the following possibly malicious URL:

• http://{BLOCKED}d.pl/image.php
• http://{BLOCKED}a.pl/image.php
• http://{BLOCKED}e.pl/image.php
• http://{BLOCKED}m.ru/image.php
• http://{BLOCKED}ge.com/image.php

NOTES:
Where {extension name} is any of the following:

• BAT
• CMD
• COM
• EXE
• PIF
• SCR