Analysis by: Earle Maui Earnshaw
 PLATFORM:

Windows

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

  • Threat Type: Coinminer

  • Destructiveness: No

  • Encrypted:

  • 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.

  TECHNICAL DETAILS

File Size: 398,336 bytes
File Type: EXE
File Compression: UPX
Memory Resident: Yes
Initial Samples Received Date: 24 May 2019
Payload: Connects to URLs/IPs

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.

Installation

This Coinminer adds the following mutexes to ensure that only one of its copies runs at any one time:

  • {Malware path and file name}

Other Details

This Coinminer does the following:

  • Checks the following windows if found running then will terminate itself:
    • Windows Task Manager
  • Connects to the following URL for coinmining activities:
    • http:\\mine.{BLOCKED}l.com:80
  • It is executed by Worm.Win32.BLASQUI.A using the following parameters:
    • -o stratum+tcp://mine.{BLOCKED}l.com:80 -u {User NAme} -p {Password} --donate-level=0 --cuda-max-threads=2
    Where:
    • -o {URL} → URL of mining server
    • -u {username} → username for mining server
    • -p {password} → password for mining server
    • --donate-level=N → donate level
    • --cuda-max-threads=N → limit maximum count of GPU threads in automatic mode
    • {User Name} → 44f3Gk4zcTvR4e8PTaYEEpJfhj8F pvnxbHADmAiiQFLeMTAzvN1Xavn3VHHNP8n4ob3WJ77KbzcQaCgGYSofCwpSQQkCW9G
    • {Password} → x
  • Accepts the following parameters:
    • -h, --help → display the following strings: "SB, FUCK YOU" and exit
    • -V, --version → output version information and build date of the
    • --url {URL} → URL of mining server

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.136.03
FIRST VSAPI PATTERN DATE: 27 May 2019
VSAPI OPR PATTERN File: 15.137.00
VSAPI OPR PATTERN Date: 28 May 2019

Step 1

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 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

Identify and terminate files detected as Coinminer.Win64.TOOLXMR.AS

[ 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.TOOLXMR.AS. 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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