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Coinminer.HTML.COINHIVE.THACOH

March 06, 2019
 Analysis by: Earle Maui Earnshaw
 ALIASES:

PUA.JScoinminer (Symantec); Riskware/CoinHive (Fortinet)

 PLATFORM:

Windows

 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:

Downloaded from the Internet, Dropped by other malware


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.

  TECHNICAL DETAILS

File Size:

4,368 bytes

File Type:

HTML, HTM

Memory Resident:

Yes

Initial Samples Received Date:

29 Jan 2018

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 does the following:

  • Connects to the following malicious URL:
    • http://online.{BLOCKED}ve.com.br/aveloz/js/imagem_status.php?base_url=http://online.{BLOCKED}ve.com.br/aveloz&login=aveloz&yid=1&deptid=0&opcao=1
  • This HTML has a JavaScript embedded into it, to run a miner for Monero cryptocurrency.
  • Connects to the following URL to execute the miner:
    • https://{BLOCKED}ve.com/lib/coinhive.min.js
  • Wallet ID: {BLOCKED}qgAWYv1XDwA4a0e732i02WyoUx

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.852.04

FIRST VSAPI PATTERN DATE:

05 Mar 2019

VSAPI OPR PATTERN File:

14.853.00

VSAPI OPR PATTERN Date:

06 Mar 2019

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Scan your computer with your Trend Micro product to delete files detected as Coinminer.HTML.COINHIVE.THACOH. 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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