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BKDR_PLUGX.BW

June 19, 2013
 Analysis by: Nikko Tamana
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size:

176,128 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

11 Jun 2013

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.

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
THUNDERBIRD SERVICE = ""{Malware Path and File Name}""

Other System Modifications

This backdoor adds the following registry keys:

HKEY_CLASSES_ROOT\MJ

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

HKEY_CLASSES_ROOT\MJ
CLSID = "{random hex values}"

Other Details

This backdoor connects to the following possibly malicious URL:

  • https://strew.{BLOCKED}darydns.com

It requires its main component to successfully perform its intended routine.