Coinminer.SH.MALXMR.ATNP
Trojan.Linux.Coinminer (Ikarus)
Linux
Threat Type: Coinminer
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
This Coinminer 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
Other
No
21 Feb 2019
Terminates processes, Connects to URLs/IPs
Arrival Details
This Coinminer arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Backdoor Routine
This Coinminer connects to the following URL(s) to send and receive commands from a remote malicious user:
- {BLOCKED}.{BLOCKED}.70.143:8888
Process Termination
This Coinminer terminates the following processes if found running in the affected system's memory:
- processes with the following strings in its command:
- {BLOCKED}.moneropool.com
- {BLOCKED}.t00ls.ru
- {BLOCKED}.crypto-pool.fr:8080
- {BLOCKED}.crypto-pool.fr:3333
- {BLOCKED}bcn@yahoo.com
- {BLOCKED}hash.com
- /tmp/a7b104c270
- {BLOCKED}.crypto-pool.fr:6666
- {BLOCKED}.crypto-pool.fr:7777
- {BLOCKED}.crypto-pool.fr:443
- {BLOCKED}.f2pool.com:8888
- {BLOCKED}ool.eu
- xiaoyao
- xiaoxue
- stratum
- processes with process name:
- jenkins
- {digit numbers} -c
- biosetjenkins
- Loopback
- apaceha
- cryptonight
- stratum
- mixnerdx
- performedl
- JnKihGjn
- irqba2anc1
- irqba5xnc1
- irqbnc1
- ir29xc1
- conns
- irqbalance
- crypto-pool
- minexmr
- 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
- minerd
- i586
- gddr
- mstxmr
- ddg.2011
- wnTKYg
- deamon
- disk_genius
- sourplum
- polkitd
- nanoWatch
- zigw
- processes found in /tmp or with more than 40% cpu usage and does not contain any of the following in its command line:
- devtool
- update.sh
- systemctI
Download Routine
This Coinminer accesses the following websites to download files:
- http://{BLOCKED}.{BLOCKED}.70.143:8506/IOFoqIgyC0zmf2UR/config.json
It connects to the following website(s) to download and execute a malicious file:
- http://{BLOCKED}.{BLOCKED}.70.143:8506/IOFoqIgyC0zmf2UR/devtool
- http://{BLOCKED}.{BLOCKED}.70.143:8506/IOFoqIgyC0zmf2UR/update.sh
- http://{BLOCKED}.{BLOCKED}.70.143:8506/IOFoqIgyC0zmf2UR/systemctI
It saves the files it downloads using the following names:
- /etc/config.json or /tmp/config.json -> config for Coinminer.Linux.MALXMR.UWEIS
- /etc/devtool or /tmp/devtool -> detected as Coinminer.Linux.MALXMR.UWEIS
- /etc/systemctI or /tmp/systemctI -> detected as Trojan.Linux.GOSCAN.AA
Other Details
This Coinminer does the following:
- Add a specific authorized keys to root account
- Empties out the following files:
- /var/spool/mail/root
- /var/log/wtmp
- /var/log/secure
- /root/.bash_history
- Creates a user or root crontab to enable automatic execution of /etc/update.sh or /tmp/update.sh every 10 minutes:
- /usr/bin/crontab
- /var/spool/cron/{user}
- crontab content: */10 * * * * sh (/etc/update.sh or /tmp/update.sh) >/dev/null 2>&1
- disables SELINUX
- Clear PageCaches
- Renames the following files:
- /usr/bin/wgen to /usr/bin/get
- /usr/bin/curl to /usr/bin/url
- Deletes crontab of current user
- Sets the following files to be immutable:
- /etc/devtool* or /tmp/devtool*
- /etc/config.json* or /tmp/config.json*
- /etc/update.sh* or /tmp/update.sh*
- /root/.ssh/authorized_keys*
- /etc/systemctI or /tmp/systemctI*
- Prevents TCP packets which uses the following ports from going out:
- 3333
- 5555
- 7777
- 9999
SOLUTION
9.850
14.828.06
21 Feb 2019
14.829.00
22 Feb 2019
Scan your computer with your Trend Micro product to delete files detected as Coinminer.SH.MALXMR.ATNP. 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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