Threat Encyclopedia

TROJ_PLUGX.ZTBF-A

Publish date: June 25, 2014

ANALYSIS BY

Rhena Inocencio


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:
INFORMATION EXPOSURE:

  • Threat Type:Trojan

  • Destructiveness:No

  • Encrypted: No

  • In the wild: Yes

OVERVIEW


This malware is part of a targeted attack against certain entities in Taiwan on June 2014, utilizing not only PlugX RAT malware but also the use of Dropbox. It uses Dropbox to update its C&C settings in order to listen and perform commands from a remote malicious user. Users affected by this malware may find the security of their systems compromised.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan may arrive bundled with malware packages as a malware component.

It is used to load and execute a file.

TECHNICAL DETAILS

File Size:

2,560 bytes

File Type:

DLL

Memory Resident:

No

Initial Samples Received Date:

12 Jun 2014

Payload:

Executes files

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

Other Details

This Trojan is used to load and execute the following file:

  • {malware path}\RasTls.DLL.msc - detected as BKDR_PLUGX.ZTBF-A

SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.856.08

FIRST VSAPI PATTERN DATE:

12 Jun 2014

VSAPI OPR PATTERN File:

10.857.00

VSAPI OPR PATTERN Date:

12 Jun 2014

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Remove the malware/grayware file dropped/downloaded by TROJ_PLUGX.ZTBF-A. (Note: Please skip this step if the threat(s) listed below have already been removed.)

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_PLUGX.ZTBF-A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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