TROJ_DLOADER.DDEX

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.

However, as of this writing, the said sites are inaccessible.

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.

Installation

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

• %User Temp%\{edcee908-b280-bcd3-a1ee-50fd6703e91a}\5lmTVwS3.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
Check Update = "%User Temp%\{edcee908-b280-bcd3-a1ee-50fd6703e91a}\5lmTVwS3.exe"

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\QtProject

It adds the following registry entries:

HKEY_CURRENT_USER\Software\QtProject
{hex value} = "{hex values}"

HKEY_CURRENT_USER\Software\QtProject
tmp_file = "{malware path and filename}"

Other Details

This Trojan connects to the following possibly malicious URL:

• {BLOCKED}efa.net

However, as of this writing, the said sites are inaccessible.