Author: Joshua Paul Ignacio   

 

Linux/CoinMiner.ML trojan (NOD32)

 PLATFORM:

Linux/Unix

 OVER ALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE
Low
Medium
High
Critical

  • Threat Type:
    Trojan

  • Destructiveness:
    No

  • Encrypted:
    No

  • In the wild:
    Yes

  OVERVIEW

INFECTION CHANNEL: Dropped by other malware

This Trojan may be dropped by other malware.

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

  TECHNICAL DETAILS

File size: 14,577 bytes
File type: Other
Memory resident: No
INITIAL SAMPLES RECEIVED DATE: 04 May 2020
PAYLOAD: Connects to URLs/IPs, Steals information

Arrival Details

This Trojan may be dropped by the following malware:

Installation

This Trojan drops the following files:

  • /tmp/log_rot
  • /proc/sys/kernel/nmi_watchdog
  • /etc/sysctl.conf
  • /usr/bin/.profile

Autostart Technique

This Trojan adds and runs the following services:

  • /etc/systemd/system/moneroocean_miner.service

Other System Modifications

This Trojan deletes the following files:

  • /var/log/syslog
  • /tmp/*
  • /tmp/.*
  • /tmp/xmrig.tar.gz

Process Termination

This Trojan terminates the following services if found on the affected system:

  • Aliyun (Alibaba Cloud)
  • YunJing (Tencent Cloud)

It terminates the following processes if found running in the affected system's memory:

  • migration

Download Routine

This Trojan connects to the following URL(s) to download its component file(s):

  • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/bin/xmrig.tar.gz
  • It will look for the latest version of Monero miner and downloads it.
    • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/bin/xmrig-5.11.0.tar.gz

It saves the files it downloads using the following names:

  • /tmp/xmrig.tar.gz
    • It will try to extract the files of /tmp/xmrig.tar.gz on /usr/bin. If successful, it will delete /tmp/xmrig.tar.gz and if not success, it will display an error message on terminal.

Information Theft

This Trojan gathers the following data:

  • Hostname
  • Number of Processing Units

Other Details

This Trojan does the following:

  • Disables Firewall
  • Disables NMI Watchdog
  • Disables and removes older version of moneroocean miner
  • It will uninstall the following security products (AV) found running on the system:
    • Aliyun (Alibaba Cloud)
    • YunJing (Tencent Cloud)
  • It will check if the advanced and stock version of /usr/bin/migration is working properly or removed by an antivirus software

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

  SOLUTION

Minimum scan engine: 9.850
First VSAPI Pattern File: 15.850.01
First VSAPI Pattern Release Date: 04 May 2020
VSAPI OPR PATTERN-VERSION: 15.851.00
VSAPI OPR PATTERN DATE: 05 May 2020

Scan your computer with your Trend Micro product to delete files detected as Trojan.SH.HADGLIDER.J. 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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