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TROJ_MIUREF.BTSJI

December 01, 2016
 Analysis by: RonJay Kristoffer Caragay
 ALIASES:

Trojan:Win32/Miuref!rfn (Microsoft); Trojan.Miuref.Generic (Malwarebytes);

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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

48,128 bytes

File Type:

DLL

Memory Resident:

No

Initial Samples Received Date:

23 Nov 2016

Arrival Details

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

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

Other Details

This Trojan requires its main component to successfully perform its intended routine.

It does the following:

  • This Trojan is used to load another component file and execute the payload on the affected system. As a result, malicious routines of the component file are exhibited on the affected system.
  • The payload component contains the same filename of this file but with any of the following extension:
    • .txt
    • .idx
    • .lck
    • .dat

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.916.08

FIRST VSAPI PATTERN DATE:

23 Nov 2016

VSAPI OPR PATTERN File:

12.917.00

VSAPI OPR PATTERN Date:

24 Nov 2016

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

Scan your computer with your Trend Micro product to delete files detected as TROJ_MIUREF.BTSJI. 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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