COINMINER_MALXMR.THDBFAJ-JS

May 18, 2018
 Analysis by: Michael Jhon Ofiaza
 PLATFORM:

Windows

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

  • Threat Type: Coinminer

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

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

It connects to certain websites to send and receive information. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

63,525 bytes

File Type:

JS

Memory Resident:

No

Initial Samples Received Date:

14 May 2018

Payload:

Connects to URLs/IPs, Steals information

Arrival Details

This Coinminer 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 Coinminer connects to the following website to send and receive information:

  • https://{BLOCKED}ystem.space/php3/loginx1.php

It does the following:

  • Steals Facebook login credentials
  • Access victims facebook account
  • Send the Malicious link to facebook friends
  • Post the Malicious link and tag friends, modifies the privacy of the post so everyone can see and unfollow the post so the victim will not be notified.
  • Deletes cookies and recent login traces when the victim logs out.
  • Redirects the victim to a fake youtube page once the link is clicked.
  • Connects to the following URL to mine cryptocurrency:
    • https://cdn.{BLOCKED}erpool.tk/webmr-x7.js
  • Connects to the following URL:
    • https://{BLOCKED}ystem1.space/php3/doms1.php -Link to be send to friends
    • http://{BLOCKED}ystem1.space/php3/sil.php -Link to be send to friends
    • https://{BLOCKED}ystem.space/img22.php
    • https://{BLOCKED}ystem.space/playbutton.png
    • https://{BLOCKED}ystem.space/php3/youtube.php - used in fake youtube page

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

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.250.08

FIRST VSAPI PATTERN DATE:

14 May 2018

VSAPI OPR PATTERN File:

14.251.00

VSAPI OPR PATTERN Date:

15 May 2018

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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as COINMINER_MALXMR.THDBFAJ-JS. 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 the following Trend Micro Support pages for more information:


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