Author: Bren Matthew Ebriega   
 

Riskware/CoinMiner (FORTINET); HEUR:RiskTool.Linux.BitCoinMiner.n (KASPERSKY)

 PLATFORM:

Linux

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

  • Threat Type:
    Coinminer

  • Destructiveness:
    No

  • Encrypted:
    No

  • In the wild::
    Yes

  OVERVIEW

INFECTION CHANNEL: Descargado de Internet, Eliminado por otro tipo de malware

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

Elimina archivos para impedir la ejecución correcta de programas y aplicaciones.

  TECHNICAL DETAILS

File size: 10,561,096 bytes
File type: ELF
Memory resident: Yes
INITIAL SAMPLES RECEIVED DATE: 30 kwietnia 2021
PAYLOAD: Terminates processes, Connects to URLs/IPs

Detalles de entrada

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

Instalación

Infiltra los archivos siguientes:

  • /tmp/systemd_conjestion_helper → Detected as Trojan.SH.MALXMR.UWEKW
  • /tmp/systemd_conjestion/systemd_conjestion → detected as Coinminer.Linux.MALXMR.SMDSL64
  • /tmp/systemd_conjestion/config.json → Contains mining parameters to be used.
  • /tmp/{username}/run_script/{random}.sh -> Drops one for every command it runs.
  • /tmp/.d
  • /tmp/ds
  • /tmp/.tmpEcwPCf
  • /tmp/.syslogdmn_lck

Crea las siguientes copias de sí mismo en el sistema afectado:

  • var/tmp/syslogdmn
  • /tmp/syslogdmn
  • /home/{username}/.syslogdmn
  • If ran as a super user:
    • /etc/cron.monthly/log
    • /etc/cron.weekly/crontabtimer
    • /etc/cron.daily/logrotatedmn
    • /etc/cron.hourly/rootd
    • /usr/local/sbin/syslogdmn
    • /usr/local/bin/syslogdmn
    • /sbin/syslogdmn
    • /bin/syslogdmn
    • /usr/sbin/syslogdmn
    • /usr/bin/syslogdmn
    • /root/.syslogdmn

Agrega los procesos siguientes:

  • sh /tmp/{username}/run_script/{random}.sh → One for every command it runs.
  • nohup /tmp/systemd_conjestion/systemd_conjestion >/dev/null 2>&1 &

Crea las carpetas siguientes:

  • /tmp/{username}/
  • /tmp/{username}/run_script/
  • /tmp/systemd_conjestion/

Otras modificaciones del sistema

Elimina los archivos siguientes:

  • /bin/kworkerds
  • /dev/shm/z1.sh
  • /etc/cron.d/system
  • /etc/cron.daily/oanacroner
  • /etc/cron.hourly/oanacroner
  • /etc/cron.monthly/oanacroner
  • /etc/init.d/nfstruncate
  • /tmp/bashf
  • /tmp/bashg
  • /tmp/conn
  • /tmp/conns
  • /tmp/crondb
  • /tmp/httpd.conf
  • /tmp/irq.sh
  • /tmp/irqbalanc1
  • /tmp/java2
  • /tmp/kworkerds
  • /tmp/libapache
  • /tmp/pools.txt
  • /tmp/root.sh
  • /tmp/systemd-private-2270f1520zse4c8a94a91c107d5b9d1b-cups.service-sjwnOy
  • /tmp/Xagent2
  • /usr/lib/libiacpkmn.so.3
  • /usr/local/lib/libdns.so
  • /usr/local/lib/libjdk.so
  • /var/tmp/config.json
  • /var/tmp/java2
  • /var/tmp/kworkerds
  • /var/tmp/systemd-private-2270f1520zse4c8a94a91c107d5b9d1b-cups.service-sjwnOy
  • /tmp/{username}/run_script/{random}.sh → After every use
  • /tmp/ds

Elimina las carpetas siguientes:

  • /tmp/*index_bak*
  • /tmp/*httpd.conf*
  • /tmp/*httpd.conf
  • /tmp/a7b104c270
  • /tmp/Carbon
  • /tmp/systemd_conjestion/

Finalización del proceso

Finaliza los procesos siguientes si detecta que se ejecutan en la memoria del sistema afectado:

  • Processes connected to the following ports:
    • :3333
    • :4444
    • :5555
    • :6666
    • :7777
    • :3347
    • :14444
    • :14433
    • :13531
  • Processes connected to the following IP Address:
    • {BLOCKED}.{BLOCKED}.55.86:443
    • {BLOCKED}.{BLOCKED}.65.238
    • {BLOCKED}.{BLOCKED}.52.87
    • {BLOCKED}.{BLOCKED}.44.93
    • {BLOCKED}.{BLOCKED}.54.205
    • {BLOCKED}.{BLOCKED}.142.232
    • {BLOCKED}.{BLOCKED}.133.20
    • {BLOCKED}.{BLOCKED}.142.249
    • {BLOCKED}.{BLOCKED}.193.110
    • {BLOCKED}.{BLOCKED}.142.225
    • {BLOCKED}.{BLOCKED}.142.246
    • {BLOCKED}.{BLOCKED}.200.177
    • {BLOCKED}.{BLOCKED}.142.250
    • {BLOCKED}.{BLOCKED}.142.251
    • {BLOCKED}.{BLOCKED}.200.178
    • {BLOCKED}.{BLOCKED}.202.177
    • {BLOCKED}.{BLOCKED}.223.190
    • {BLOCKED}.{BLOCKED}.232.9
    • {BLOCKED}.{BLOCKED}.89.10
    • {BLOCKED}.{BLOCKED}.40.46
  • Processes with the following strings in its commandline:
    • {BLOCKED}l.eu
    • mine.{BLOCKED}pool.com
    • xmr.{BLOCKED}-pool.fr:8080
    • xmr.{BLOCKED}-pool.fr:3333
    • xmr.{BLOCKED}-pool.fr:6666
    • xmr.{BLOCKED}-pool.fr:7777
    • xmr.{BLOCKED}-pool.fr:443
    • prohash
    • 11231
    • Silence
    • wipefs
    • Xagent2
    • webchainminer
    • conjestion
    • {BLOCKED}ol.org
    • {BLOCKED}r.com
    • {BLOCKED}txmr.com
    • {BLOCKED}l.net
    • {BLOCKED}ate.com
    • {BLOCKED}r.com
    • {BLOCKED}ult.pro
    • {BLOCKED}MR.com
    • {BLOCKED}va.cc
    • {BLOCKED}Ocean.stream
    • {BLOCKED}l.de
    • {BLOCKED}o.be
    • {BLOCKED}h.net
    • xmr.{BLOCKED}l.online
    • monero.{BLOCKED}s.to
    • {BLOCKED}ool.com
    • {BLOCKED}l.xyz
    • {BLOCKED}nero.gq
    • {BLOCKED}i.cn
    • {BLOCKED}d.com
    • {BLOCKED}ool.com
    • {BLOCKED}tmining.com
    • monero.{BLOCKED}s.pro
    • berods
    • vmlinuz
    • dblaunchs
    • khugepageds
    • systemctI
    • webchainpool
    • {BLOCKED}ning.com
    • {BLOCKED}n@yahoo.com
    • {BLOCKED}hash.com
    • stratum.{BLOCKED}l.com:8888
    • nTKYg
    • qW3xT.2
    • ddgs.3013
    • ddgs.3012
    • biosetjenkins
    • AnXqV.yam
    • xmrigDaemon
    • xmrigMiner
    • xmrig
    • apaceha
    • cryptonight
    • stratum
    • performedl
    • irqba2anc1
    • irqba5xnc1
    • irqbnc1
    • ir29xc1
    • conns
    • irqbalance
    • crypto-pool
    • minexmr
    • XJnRj
    • NXLAi
    • BI5zj
    • askdljlqw
    • minerd
    • minergate
    • ysaydh
    • bonns
    • donns
    • Duck.sh
    • bonn.sh
    • conn.sh
    • kworker34
    • kw.sh
    • pro.sh
    • polkitd
    • acpid
    • icb5o
    • nopxi
    • irqbalanc1
    • mstxmr
    • deamon
    • disk_genius
    • 42HrCwmHSVyJSAQwn6Lifc3WWAWN56U8s2qAbm6BAagW6Ryh8JgWq8Q1JbZ8nXdcFVgnmAM3q86cm5y9xfmvV1ap6qVvmPe
    • 4BrL51JCc9NGQ71kWhnYoDRffsDZy7m1HUU7MRU4nUMXAHNFBEJhkTZV9HdaL4gfuNBxLPc3BeMkLGaPbF5vWtANQt989KEfGRt6Ww2Xg8
    • 46SDR76rJ2J6MtmP3ZZKi9cEA5RQCrYgag7La3CxEootQeAQULPE2CHJQ4MRZ5wZ1T73Kw6Kx4Lai2dFLAacjerbPzb5Ufg
    • 45cToD1FzkjAxHRBhYKKLg5utMGENqyamWrY8nLNkVQ4hJgLHex1KNRZcz4finRjMpAYmPxDaXVpN2rV1jMNyXRdMEaH1YA
    • 45hsTaSqTQM4K1Xeqkcy7eLzqdEuQ594fJVmQryCemQSCU878JGQdSDCxbhNyVjSkiaYat8yAfBuRTPSEUPZoARm9a5XEHZ
    • 47sghzufGhJJDQEbScMCwVBimTuq6L5JiRixD8VeGbpjCTA12noXmi4ZyBZLc99e66NtnKff34fHsGRoyZk3ES1s1V4QVcB
    • 44iuYecTjbVZ1QNwjWfJSZFCKMdceTEP5BBNp4qP35c53Uohu1G7tDmShX1TSmgeJr2e9mCw2q1oHHTC2boHfjkJMzdxumM
    • 49hNrEaSKAx5FD8PE49Wa3DqCRp2ELYg8dSuqsiyLdzSehFfyvk4gDfSjTrPtGapqcfPVvMtAirgDJYMvbRJipaeTbzPQu4
    • 4AniF816tMCNedhQ4J3ccJayyL5ZvgnqQ4X9bK7qv4ZG3QmUfB9tkHk7HyEhh5HW6hCMSw5vtMkj6jSYcuhQTAR1Sbo15gB
    • 4813za7ePRV5TBce3NrSrugPPJTMFJmEMR9qiWn2Sx49JiZE14AmgRDXtvM1VFhq

Otros detalles

Hace lo siguiente:

  • If run as a super user, it creates the following cron jobs for persistence:
    • Path: /var/spool/cron/root
      • Schedule: Every 10 minutes
      • Command: 0,10,20,30,40,50 0-23 * * * nohup syslogdmn >/dev/null 2>&1 &
    • Path: /etc/crontab
      • Schedule: Every 10 minutes
      • Command: 0,10,20,30,40,50 0-23 * * * root nohup syslogdmn >/dev/null 2>&1 &
    • Path: /etc/cron.d/root
      • Schedule: Every 10 minutes
      • Command: 0,10,20,30,40,50 0-23 * * * nohup syslogdmn >/dev/null 2>&1 &
    • Path: /var/spool/cron/crontabs/root
      • Schedule: Every 10 minutes
      • Command: 0,10,20,30,40,50 0-23 * * * nohup syslogdmn >/dev/null 2>&1 &
  • It uses the following default details on its coin mining routine (from config.json):
    • Algo: cryptonight
    • Url: {BLOCKED}.{BLOCKED}.28.19:8080
    • User: {user or root}
    • Password: x

  SOLUTION

Minimum scan engine: 9.800
First VSAPI Pattern File: 16.688.07
First VSAPI Pattern Release Date: 30 kwietnia 2021
VSAPI OPR PATTERN-VERSION: 16.689.00
VSAPI OPR PATTERN DATE: 01 maja 2021

Explorar el equipo con su producto de Trend Micro para eliminar los archivos detectados como Coinminer.Linux.MALXMR.PUWEMD En caso de que el producto de Trend Micro ya haya limpiado, eliminado o puesto en cuarentena los archivos detectados, no serán necesarios más pasos. Puede optar simplemente por eliminar los archivos en cuarentena. Consulte esta página de Base de conocimientos para obtener más información.


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