Trojan.SH.MALXMR.UWEKB

June 10, 2020
 Analysis by: Joshua Paul Ignacio
 ALIASES:

N/A

 PLATFORM:

Linux/Unix

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • 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:

37,849 bytes

File Type:

Other

Memory Resident:

Yes

Initial Samples Received Date:

08 Jun 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.

Dropping Routine

This Trojan drops the following files:

  • /root/.ssh/authorized_keys

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}.{BLOCKED}.218.107/b2f627/svcupdate
  • http://{BLOCKED}.{BLOCKED}.218.107/b2f627/newsvc.sh
  • http://{BLOCKED}.{BLOCKED}.218.107/b2f627/config.json
  • http://{BLOCKED}.{BLOCKED}.218.107/b2f627/svcworkmanager
  • http://{BLOCKED}.{BLOCKED}.218.107/b2f627/svcguard
  • http://global.{BLOCKED}x.com.de/b2f627fff19fda/svcguard
  • http://global.{BLOCKED}x.com.de/b2f627fff19fda/svcupdate
  • http://global.{BLOCKED}x.com.de/b2f627fff19fda/newsvc.sh
  • http://global.{BLOCKED}x.com.de/b2f627fff19fda/config.json
  • http://global.{BLOCKED}x.com.de/b2f627fff19fda/svcworkmanager

It saves the files it downloads using the following names:

  • If /etc/svcupdate exists on the affected machine:
  • If there is no /etc/svcupdate on the affected machine:
    • /tmp/config.json
    • /tmp/svcupdate
    • /tmp/svcguard
    • /tmp/newsvc.sh
    • /tmp/svcworkmanager

Other Details

This Trojan does the following:

  • It creates the following cron jobs for persistence:
    • Path: /var/spool/cron/crontabs/
    • Schedule: Every 30 minutes
    • Command: */30 * * * * sh /etc/newsvc.sh >/dev/null 2>&1
  • Disables Firewall
  • Deletes the following user accounts:
    • akay
    • vfinder
  • Stops and Disables the following services:
    • apparmor
    • aliyun.service
  • Uninstalls the following security products (AV) found running on the system:
    • Aliyun (Alibaba Cloud)
    • YunJing (Tencent Cloud)
  • Terminates the following connections:
    • {BLOCKED}.{BLOCKED}.65.238
    • {BLOCKED}.{BLOCKED}.52.87
    • {BLOCKED}.{BLOCKED}.253.15
    • {BLOCKED}.{BLOCKED}.6.16
    • :443
    • :23
    • :443
    • :143
    • :2222
    • :3333
    • :3389
    • :4444
    • :5555
    • :6666
    • :6665
    • :6667
    • :7777
    • :8444
    • :3347
    • :14433
  • Terminates processes that contains the following strings:
    • ':3333'
    • ':5555'
    • 'kworker -c\'
    • 'log_'
    • 'systemten'
    • 'netns'
    • 'voltuned'
    • 'darwin'
    • '/tmp/dl'
    • '/tmp/ddg'
    • '/tmp/pprt'
    • '/tmp/ppol'
    • '/tmp/65ccE*'
    • '/tmp/jmx*'
    • '/tmp/2Ne80*'
    • 'IOFoqIgyC0zmf2UR'
    • '{BLOCKED}.{BLOCKED}.122.92'
    • '{BLOCKED}.{BLOCKED}.191.178'
    • '{BLOCKED}.{BLOCKED}.56.161'
    • '86s.jpg'
    • 'aGTSGJJp'
    • 'nMrfmnRa'
    • 'PuNY5tm2'
    • 'I0r8Jyyt'
    • 'AgdgACUD'
    • 'uiZvwxG8'
    • 'hahwNEdB'
    • 'BtwXn5qH'
    • '3XEzey2T'
    • 't2tKrCSZ'
    • 'HD7fcBgg'
    • 'zXcDajSs'
    • '3lmigMo'
    • 'AkMK4A2'
    • 'AJ2AkKe'
    • 'HiPxCJRS'
    • 'http_0xCC030'
    • 'http_0xCC031'
    • 'http_0xCC032'
    • 'http_0xCC033'
    • "C4iLM4L"
    • 'aziplcr72qjhzvin'
    • '/boot/vmlinuz'
    • "i4b503a52cc5"
    • "dgqtrcst23rtdi3ldqk322j2"
    • "2g0uv7npuhrlatd"
    • "nqscheduler"
    • "rkebbwgqpl4npmm"
    • "2fhtu70teuhtoh78jc5s"
    • "0kwti6ut420t"
    • "44ct7udt0patws3agkdfqnjm"
    • "\[^"
    • "rsync"
    • "watchd0g"
    • 'wnTKYg|2t3ik|qW3xT.2|ddg'
    • "{BLOCKED}.{BLOCKED}.133.18:8220"
    • "/tmp/java"
    • 'gitee.com'
    • '/tmp/java'
    • '{BLOCKED}.{BLOCKED}.4.162'
    • '{BLOCKED}.{BLOCKED}.39.78'
    • '/dev/shm/z3.sh'
    • 'kthrotlds'
    • 'ksoftirqds'
    • 'netdns'
    • 'watchdogs'
    • 'kdevtmpfsi'
    • 'kinsing'
    • 'redis2'
    • "sync_supers"
    • "cpuset"
    • '/tmp/l.sh'
    • '/tmp/zmcat'
    • 'CnzFVPLF'
    • 'CvKzzZLs'
    • '/tmp/udevd'
    • 'KCBjdXJsIC1vIC0gaHR0cDovLzg5LjIyMS41Mi4xMjIvcy5zaCApIHwgYmFzaCA'
    • 'Y3VybCAtcyBodHRwOi8vMTA3LjE3NC40Ny4xNTYvbXIuc2ggfCBiYXNoIC1zaAo'
    • 'sustse'
    • 'sustse3'
    • 'mr.sh'
    • '2mr.sh'
    • 'cr5.sh'
    • 'logo9.jpg'
    • 'j2.conf'
    • 'luk-cpu'
    • 'ficov'
    • 'he.sh'
    • 'miner.sh'
    • 'nullcrew'
    • '{BLOCKED}.{BLOCKED}.47.156'
    • '{BLOCKED}.{BLOCKED}.169.247'
    • '{BLOCKED}.{BLOCKED}.203.146'
    • '{BLOCKED}.{BLOCKED}.45.45'
    • '{BLOCKED}.{BLOCKED}.47.181'
    • '176.31.6.16'
    • "mine.moneropool.com"
    • "pool.t00ls.ru"
    • "xmr.crypto-pool.fr:8080"
    • "xmr.crypto-pool.fr:3333"
    • "{BLOCKED}n@yahoo.com"
    • "monerohash.com"
    • "/tmp/a7b104c270"
    • "xmr.crypto-pool.fr:6666"
    • "xmr.crypto-pool.fr:7777"
    • "xmr.crypto-pool.fr:443"
    • "stratum.f2pool.com:8888"
    • "xmrpool.eu"
    • "{BLOCKED}{BLOCKED}m.me"
    • xiaoyao
    • xiaoxue
    • monerohash
    • L2Jpbi9iYXN
    • xzpauectgr
    • slxfbkmxtd
    • mixtape
    • addnj
    • {BLOCKED}.{BLOCKED}.17.196
    • IyEvYmluL3NoCgpzUG
    • KHdnZXQgLXFPLSBodHRw
    • FEQ3eSp8omko5nx9e97hQ39NS3NMo6rxVQS3
    • Y3VybCAxOTEuMTAxLjE4MC43Ni9saW4udHh0IHxzaAo
    • {BLOCKED}dbpq.conf
    • {BLOCKED}asbf.conf
    • {BLOCKED}lm.cf
    • stratum
    • lower.sh
    • ./ppp
    • cryptonight
    • ./seervceaess
    • ./servceaess
    • ./servceas
    • ./servcesa
    • ./vsp
    • ./jvs
    • ./pvv
    • ./vpp
    • ./pces
    • ./rspce
    • ./haveged
    • ./jiba
    • ./watchbog
    • ./A7mA5gb
    • kacpi_svc
    • kswap_svc
    • kauditd_svc
    • kpsmoused_svc
    • kseriod_svc
    • kthreadd_svc
    • ksoftirqd_svc
    • kintegrityd_svc
    • jawa
    • oracle.jpg
    • 45cToD1FzkjAxHRBhYKKLg5utMGEN
    • {BLOCKED}.{BLOCKED}.49.54
    • {BLOCKED}.{BLOCKED}.87.241
    • etnkFgkKMumdqhrqxZ6729U7bY8pzRjYzGbXa5sDQ
    • 47TdedDgSXjZtJguKmYqha4sSrTvoPXnrYQEq2Lbj
    • etnkP9UjR55j9TKyiiXWiRELxTS51FjU9e1UapXyK
    • servim
    • kblockd_svc
    • native_svc
    • ynn
    • 65ccEJ7
    • jmxx
    • 2Ne80nA
    • sysstats
    • systemxlv
    • watchbog
    • OIcJi1m
    • biosetjenkins
    • Loopback
    • apaceha
    • mixnerdx
    • performedl
    • JnKihGjn
    • irqba2anc1
    • irqba5xnc1
    • irqbnc1
    • ir29xc1
    • conns
    • irqbalance
    • crypto-pool
    • XJnRj
    • mgwsl
    • pythno
    • jweri
    • lx26
    • NXLAi
    • BI5zj
    • askdljlqw
    • minerd
    • minergate
    • Guard.sh
    • ysaydh
    • bonns
    • donns
    • kxjd
    • Duck.sh
    • bonn.sh
    • conn.sh
    • kworker34
    • kw.sh
    • pro.sh
    • polkitd
    • acpid
    • icb5o
    • nopxi
    • irqbalanc1
    • i586
    • gddr
    • mstxmr
    • ddg.2011
    • wnTKYg
    • deamon
    • disk_genius
    • sourplum
    • nanoWatch
    • zigw
    • devtool
    • devtools
    • systemctI
    • sustes
    • xmrig
    • xmrig-cpu
    • 121.42.151.137
    • init12.cfg
    • nginxk
    • tmp/wc.conf
    • xmrig-notls
    • xmr-stak
    • suppoie
    • zer0day.ru
    • dbus-daemon--system
    • nullcrew
    • kworkerds
    • init10.cfg
    • /wl.conf
    • crond64
    • sustse
    • vmlinuz
    • exin
    • apachiii
    • svcguard
    • newsvc.sh
    • svcupdate
    • svcworkmanager
    • "pocosow"
    • "gakeaws"
    • "azulu"
    • "auto"
    • "xmr"
    • "mine"
    • "monero"
    • "slowhttp"
    • "bash.shell"
    • "entrypoint.sh"
    • "/var/sbin/bash"
    • "buster-slim"
    • "hello-"
    • "registry"
    • 'aegis'
    • 'Yun'
  • Deletes the following directories:
    • /usr/bin/config.json
    • /usr/bin/exin
    • /tmp/wc.conf
    • /tmp/log_rot
    • /tmp/apachiii
    • /tmp/sustse
    • /tmp/php
    • /tmp/p2.conf
    • /tmp/pprt
    • /tmp/ppol
    • /tmp/javax/config.sh
    • /tmp/javax/sshd2
    • /tmp/.profile
    • /tmp/1.so
    • /tmp/kworkerds
    • /tmp/kworkerds3
    • /tmp/kworkerdssx
    • /tmp/xd.json
    • /tmp/syslogd
    • /tmp/syslogdb
    • /tmp/65ccEJ7
    • /tmp/jmxx
    • /tmp/2Ne80nA
    • /tmp/dl
    • /tmp/ddg
    • /tmp/systemxlv
    • /tmp/systemctI
    • /tmp/.abc
    • /tmp/osw.hb
    • /tmp/.tmpleve
    • /tmp/.tmpnewzz
    • /tmp/.java
    • /tmp/.omed
    • /tmp/.tmpc
    • /tmp/.tmpleve
    • /tmp/.tmpnewzz
    • /tmp/gates.lod
    • /tmp/conf.n
    • /tmp/devtool
    • /tmp/devtools
    • /tmp/fs
    • /tmp/.rod
    • /tmp/.rod.tgz
    • /tmp/.rod.tgz.1
    • /tmp/.rod.tgz.2
    • /tmp/.mer
    • /tmp/.mer.tgz
    • /tmp/.mer.tgz.1
    • /tmp/.hod
    • /tmp/.hod.tgz
    • /tmp/.hod.tgz.1
    • /tmp/84Onmce
    • /tmp/C4iLM4L
    • /tmp/lilpip
    • /tmp/3lmigMo
    • /tmp/am8jmBP
    • /tmp/tmp.txt
    • /tmp/baby
    • /tmp/.lib
    • /tmp/systemd
    • /tmp/lib.tar.gz
    • /tmp/baby
    • /tmp/java
    • /tmp/j2.conf
    • /tmp/.mynews1234
    • /tmp/a3e12d
    • /tmp/.pt
    • /tmp/.pt.tgz
    • /tmp/.pt.tgz.1
    • /tmp/go
    • /tmp/java
    • /tmp/j2.conf
    • /tmp/.tmpnewasss
    • /tmp/java
    • /tmp/go.sh
    • /tmp/go2.sh
    • /tmp/khugepageds
    • /tmp/.censusqqqqqqqqq
    • /tmp/.kerberods
    • /tmp/kerberods
    • /tmp/seasame
    • /tmp/touch
    • /tmp/.p
    • /tmp/runtime2.sh
    • /tmp/runtime.sh
    • /dev/shm/z3.sh
    • /dev/shm/z2.sh
    • /dev/shm/.scr
    • /dev/shm/.kerberods
    • /etc/ld.so.preload
    • /usr/local/lib/libioset.so
    • chattr -i /etc/ld.so.preload
    • /etc/ld.so.preload
    • /usr/local/lib/libioset.so
    • /tmp/watchdogs
    • /etc/cron.d/tomcat
    • /etc/rc.d/init.d/watchdogs
    • /usr/sbin/watchdogs
    • /tmp/kthrotlds
    • /etc/rc.d/init.d/kthrotlds
    • /tmp/.sysbabyuuuuu12
    • /tmp/logo9.jpg
    • /tmp/miner.sh
    • /tmp/nullcrew
    • /tmp/proc
    • /tmp/2.sh
    • /opt/atlassian/confluence/bin/1.sh
    • /opt/atlassian/confluence/bin/1.sh.1
    • /opt/atlassian/confluence/bin/1.sh.2
    • /opt/atlassian/confluence/bin/1.sh.3
    • /opt/atlassian/confluence/bin/3.sh
    • /opt/atlassian/confluence/bin/3.sh.1
    • /opt/atlassian/confluence/bin/3.sh.2
    • /opt/atlassian/confluence/bin/3.sh.3
    • /var/tmp/f41
    • /var/tmp/2.sh
    • /var/tmp/config.json
    • /var/tmp/xmrig
    • /var/tmp/1.so
    • /var/tmp/kworkerds3
    • /var/tmp/kworkerdssx
    • /var/tmp/kworkerds
    • /var/tmp/wc.conf
    • /var/tmp/nadezhda.
    • /var/tmp/nadezhda.arm
    • /var/tmp/nadezhda.arm.1
    • /var/tmp/nadezhda.arm.2
    • /var/tmp/nadezhda.x86_64
    • /var/tmp/nadezhda.x86_64.1
    • /var/tmp/nadezhda.x86_64.2
    • /var/tmp/sustse3
    • /var/tmp/sustse
    • /var/tmp/moneroocean/
    • /var/tmp/devtool
    • /var/tmp/devtools
    • /var/tmp/play.sh
    • /var/tmp/systemctI
    • /var/tmp/.java
    • /var/tmp/1.sh
    • /var/tmp/conf.n
    • /var/tmp/lib
    • /var/tmp/.lib
    • /usr/local/aegis
    • /var/spool/cron/*
  • It blocks outgoing traffic to the following ports:
    • 3333
    • 5555
    • 7777
    • 9999
  • It checks for the existence of /root/.ssh/known_hosts and /root/.ssh/id_rsa.pub on the affected machine and if found, it will try to connect to all of the known ports and it will connect to the following URL to download and execute to the affexted machine:
    • http://global.{BLOCKED}x.com.de/b2f627fff19fda/is.sh - Detected as Trojan.SH.MALXMR.UWEKB

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.918.02

FIRST VSAPI PATTERN DATE:

08 Jun 2020

VSAPI OPR PATTERN File:

15.919.00

VSAPI OPR PATTERN Date:

09 Jun 2020

Scan your computer with your Trend Micro product to delete files detected as Trojan.SH.MALXMR.UWEKB. 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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