Analysis by: Mohammed Malubay
ALIASES:

VHO:Trojan.Win32.Miner.gen(KASPERSKY); a variant of Win64/CoinMiner.PR potentially unwanted application(NOD32);

 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.

It uses the system's central processing unit (CPU) and/or graphical processing unit (GPU) resources to mine cryptocurrency.

  TECHNICAL DETAILS

File Size: 1,273,856 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 28 Apr 2021
Payload: Connects to URLs/IPs, Others

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:

  • Uses the following pools for mining:
    • pool.{BLOCKED}r.com:4444
  • Uses the embedded configuration for its coin mining routine:
    • User: {BLOCKED}HQ9Ck1AwqcAax2Yz3GEip5P5aMagcpJPpd1HZaBaoMvwxSAwNsTxVAPrB6JuEPyF
    • Password: x
    • Algorithms:
      • cn/1
      • cn/2
      • cn/r
      • cn/fast
      • cn/half
      • cn/xao
      • cn/rto
      • cn/rwz
      • cn/zls
      • cn/double
      • cn/ccx
      • rx/0
      • rx/wow
      • rx/arq
      • rx/sfx
      • rx/keva
      • argon2/chukwa
      • argon2/chukwav2
      • argon2/wrkz

It uses the system's central processing unit (CPU) and/or graphical processing unit (GPU) resources to mine cryptocurrency. This behavior makes the system run abnormally slow.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.740.05
FIRST VSAPI PATTERN DATE: 25 May 2021
VSAPI OPR PATTERN File: 16.741.00
VSAPI OPR PATTERN Date: 26 May 2021

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

  • Troj.Win32.TRX.XXPE50FFF043

Step 2

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 3

Identify and terminate files detected as Coinminer.Win64.XMRIG.YXBD2

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Scan your computer with your Trend Micro product to delete files detected as Coinminer.Win64.XMRIG.YXBD2. 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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