COINMINER_WEBJSE.SM-JS

March 15, 2018
 Analysis by: John Anthony Banes
 ALIASES:

JS:Application.JS.Miner.D (BitDefender); JS.Webcoinminer (Norton)

 PLATFORM:

Windows, Linux, MacOS, Android, iOS

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

  • Threat Type: Coinminer

  • Destructiveness: No

  • Encrypted: No

  • 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 may be hosted on a website and run when a user accesses the said website.

It does not have any propagation routine.

It does not have any backdoor routine.

  TECHNICAL DETAILS

File Size:

12,448 bytes

File Type:

JS

Memory Resident:

No

Initial Samples Received Date:

13 Mar 2018

Payload:

Connects to URLs/IPs, Displays message/message boxes

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.

It may be hosted on a website and run when a user accesses the said website.

Propagation

This Coinminer does not have any propagation routine.

Backdoor Routine

This Coinminer does not have any backdoor routine.

NOTES:

This JavaScript is embedded into websites to run a miner for JSECoin cryptocurrency.

It uses the system's central processing unit (CPU) resources to mine for cryptocurrency.

It also sends and receives mining-related data to: https://load.{BLOCKED}n.com

It displays the following message to notify and ask the user for permission to use resources for mining:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.118.05

FIRST VSAPI PATTERN DATE:

09 Mar 2018

VSAPI OPR PATTERN File:

14.119.00

VSAPI OPR PATTERN Date:

10 Mar 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_WEBJSE.SM-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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