Author: Earle Maui Earnshaw   

 

N/A

 PLATFORM:

Linux

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

  • Threat Type:
    Trojan

  • Destructiveness:
    No

  • Encrypted:
     

  • In the wild:
    Yes

  OVERVIEW

INFECTION CHANNEL: Downloaded from the Internet

This Trojan 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: 13,114 bytes
File type: Other
Memory resident: Yes
INITIAL SAMPLES RECEIVED DATE: 04 May 2020
PAYLOAD: Connects to URLs/IPs, Downloads files

Arrival Details

This Trojan 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 Trojan drops the following files:

  • /urs/bin/config1.json → contains the configuration of the miner
  • /proc/sys/vm/drop_caches
  • /etc/systemd/system/watchdogd.service

It adds the following processes:

  • /usr/bin/watchdogd
  • /usr/bin/xmrigMiner
  • /usr/bin/config.json
  • /etc/init.d/watchdogd
  • /etc/systemd/system/watchdogd.service
  • systemctl --system daemon-reload
  • systemctl enable watchdogd.service
  • systemctl start watchdogd.service
  • systemctl status watchdogd.service
  • systemctl start watchdogd || service Watchdogd start
  • systemctl start watchdogd || service Watchdogd status

It creates the following folders:

  • /var/spool/cron/crontabs
  • /etc/cron.d/

Autostart Technique

This Trojan starts the following services:

  • watchdogd.service

Other System Modifications

This Trojan deletes the following files:

  • /usr/bin/watchdogd
  • /usr/bin/xmrigMiner
  • /usr/bin/config.json
  • /usr/bin/rstart.sh
  • /tmp/watchdogd
  • /tmp/xmrigMiner
  • /tmp/config.json
  • /usr/bin/lo
  • /usr/bin/
  • /bin/hid
  • /usr/bin/sysh
  • /usr/bin/systemd-clean
  • /usr/bin/systemd-healt
  • /etc/init.d/xmrcc
  • /lib/systemd/system/xmrcc.service
  • /etc/systemd/system/xmrcc.service
  • /etc/systemd/system/multi-user.target.wants/xmrcc.service
  • .route.txt

It deletes the following folders:

  • /var/spool/cron/*
  • /etc/cron.d/
  • /var/spool/mail/root

Process Termination

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

  • watchdogd.service

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

  • aliyun.one
  • curl
  • wget
  • /tmp/

Download Routine

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

  • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/nk/config.json
  • ftp://ftp.{BLOCKED}r.liu.se/pub/unix/pnscan/pnscan-1.11.tar.gz

It saves the files it downloads using the following names:

  • /usr/bin/config1.json
  • /usr/bin/config.json

Other Details

This Trojan does the following:

  • Checks the existence of the following processes that contains the following strings in their command line:
    • "3.0.192.200:10008"
    If it exist will download malicious files in the following URL:
    • http://{BLOCKED}nt.red/load/cyo.sh
  • Checks for the file "/usr/bin/64bit.tar.gz" if size is not equal to 3319957 bytes will download file from the following URL:
    • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/nk/64bit.tar.gz
  • Checks for the file "/usr/bin/32bit.tar.gz" if size is not equal to 2269097 bytes will download file from the following URL:
    • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/nk/32bit.tar.gz
  • Checks for the file "/usr/bin/service_files.tar.gz" if size is not equal to 1937 bytes will download file from the following URL:
    • http://{BLOCKED}.{BLOCKED}.148.123/COVID19/nk/service_files.tar.gz
  • Enable HugePages
  • Disable Uncomplicated firewall and sets it's configuration to allow TCP connection with the following ports:
    • 1982
    • 3344
    • 4444
    • 5555
    • 6666
    • 7777
    • 8888
    • 9000
  • Configure the Firewall by executing the following commands:
    • firewall-cmd --add-port={Port}/tcp --permanent
    • firewall-cmd --reload
      • Where {Port} are the following:
      • 1982
      • 3344
      • 4444
      • 5555
      • 6666
      • 7777
      • 8888
      • 9000
  • Save the all of the network information and connection in the machine in the following files:
    • /etc/iptables/iptables.rules
    This covers all of the connection related to the port listed.
  • Hides the following processes:
    • watchdogd
    • xmrigMiner
  • Sends the following files to the URL, "http:/teamtnt.red/up/setup_upload.php":
    • /root/.ssh/id_rsa
    • /root/.ssh/id_rsa.pub
    • /root/.ssh/known_host
    • /root/.bash_history
    • /etc/host

  SOLUTION

Minimum scan engine: 9.850
First VSAPI Pattern File: 15.848.07
First VSAPI Pattern Release Date: 05 May 2020
VSAPI OPR PATTERN-VERSION: 15.849.00
VSAPI OPR PATTERN DATE: 06 May 2020

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