Analysis by: Mohammed Malubay
ALIASES:

a variant of Linux/CoinMiner.AV potentially unwanted application(NOD32);

 PLATFORM:

Linux

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Canal de infección Downloaded from the Internet, Dropped by other malware

This Worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes then deletes itself afterward.

  TECHNICAL DETAILS

Tamaño del archivo 4,338,432 bytes
Tipo de archivo ELF
Residente en memoria Yes
Fecha de recepción de las muestras iniciales 01 Apr 2021
Carga útil Steals information

Arrival Details

This Worm 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 Worm drops the following files:

  • /tmp/.{random characters}/[kthreaddi]
  • /tmp/.{random characters}/config.json

It adds the following processes:

  • [kthreaddi]

It creates the following folders:

  • /tmp/.{random characters}

It executes then deletes itself afterward.

Process Termination

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

  • apaceha
  • apachiii
  • cpuset
  • crond64
  • cryptonight
  • devtool
  • devtools
  • haveged
  • irqbalanc1
  • jawa
  • kdevtmpfsi
  • kinsing
  • ksoftirqds
  • kthrotlds
  • kworker34
  • kworkerds
  • linux32
  • Loopback
  • miner-cpu
  • miner-notls
  • miner
  • minerd
  • minergate
  • mixnerdx
  • monerohash
  • mstxmr
  • nanoWatch
  • netdns
  • nginxk
  • nqscheduler
  • nullcrew
  • performedl
  • phpguard
  • phpupdate
  • pnscan
  • pythnof
  • redis2
  • solrd
  • sourplum
  • stratum
  • suppoie
  • sustse
  • sustse3
  • svcguard
  • svcupdate
  • svcupdates
  • sysguard
  • sysstats
  • systemctI
  • systemten
  • systemxlv
  • sysupdate
  • vmlinuz
  • voltuned
  • watchbog
  • watchd0g
  • watchdogs
  • xmr-stak

Other Details

This Worm does the following:

  • If the deployment of the coinminer is successful, it would proceed to delete the created folder and its contents ([kthreaddi] and config.json).
  • It uses the following default details on its coin mining routine (from config.json):
    • Algo: rx/0
    • Url: xmr-eu1.nanopool.org:14444
    • User: {BLOCKED}PrDj3KF8fR1BHLBfiVArU6Hu61N9gtrZWgbRptntwht5JUrXX17ZeofwPwC6fXNxPZfGjNEChXttwWE3EGUEa
    • Password: x
  • If exploitation is successful, connects to the following URL to download and execute a malicious file:
    • http://{BLOCKED}.{BLOCKED}.227.21
  • It may use the following exploits to aid its propagation:
    • XXL-JOB unauthorized access
    • WebLogic Unauthorized Access (CVE-2020-14882)
    • ThinkPhp5Rce
    • Hadoop unauthorized access
    • Jupyter unauthorized access
    • Nexus unauthorized access
    • Tomcat unauthorized access
    • WordPress unauthorized access
    • Jenkins RCE
    • CVE-2017-11610
    • CVE-2019-10758
    • CVE-2020-16846
    • CVE-2021-3129
  • It scans the following ports to be used in exploitation and propagation:
    • 80
    • 6379
    • 7001
    • 8080
    • 8081
    • 8088
    • 8090
    • 8888
    • 8983
    • 9001
    • 9999
  • It uses the following credentials to bruteforce a system:
    • Username:
      • admin1234
      • admin@123
      • Admin@123
      • admin
      • Admin123
      • mfgproadmin
      • root
      • test
      • user
      • tomcat
    • Password:
      • 1q2e3e4r
      • 12345678
      • 123456
      • Admin123
      • P@ssw0rd
      • admin123
      • password
      • admin
      • tomcat
      • root
      • test
      • user
      • secret
      • tomcat123
      • oracle
  • It tries to bruteforce the following systems:
    • Wordpress
    • Tomcat
    • Nexus
    • Jupyter
    • Jenkins

  SOLUTION

Motor de exploración mínimo 9.800
Primer archivo de patrones de VSAPI 16.634.06
Primera fecha de publicación de patrones de VSAPI 03 Apr 2021
Versión de patrones OPR de VSAPI 16.635.00
Fecha de publicación de patrones OPR de VSAPI 04 Apr 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.ELF.TRX.XXELFC1DFF004

Step 2

Scan your computer with your Trend Micro product to delete files detected as Worm.Linux.MALXMR.PUWELX. 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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