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Linux.Mirai.3581

Added to the Dr.Web virus database: 2019-11-05

Virus description added:

Technical Information

Malicious functions:
Launches itself as a daemon
Substitutes application name for:
  • /bin/busybox
Replaces the following system files:
  • /bin/wget
  • /sbin/wget
Launches processes:
  • /bin/sh -c cd /bin/; cat tftp > tftp-cpy; cat <SAMPLE_FULL_PATH> > tftp
  • cat tftp
  • cat <SAMPLE_FULL_PATH>
  • /bin/sh -c chmod 777 tftp
  • chmod 777 tftp
  • /bin/sh -c cd /bin/; cat rm > rm-cpy; cat <SAMPLE_FULL_PATH> > rm
  • cat rm
  • /bin/sh -c chmod 777 rm
  • chmod 777 rm
  • /bin/sh -c cd /bin/; cat kill > kill-cpy; cat <SAMPLE_FULL_PATH> > kill
  • cat kill
  • /bin/sh -c chmod 777 kill
  • chmod 777 kill
  • /bin/sh -c cd /bin/; cat cd > cd-cpy; cat <SAMPLE_FULL_PATH> > cd
  • cat cd
  • /bin/sh -c chmod 777 cd
  • chmod 777 cd
  • /bin/sh -c cd /bin/; cat wget > wget-cpy; cat <SAMPLE_FULL_PATH> > wget
  • cat wget
  • /bin/sh -c chmod 777 wget
  • chmod 777 wget
  • /bin/sh -c cd /sbin/; cat tftp > tftp-cpy; cat <SAMPLE_FULL_PATH> > tftp
  • /bin/sh -c cd /sbin/; cat rm > rm-cpy; cat <SAMPLE_FULL_PATH> > rm
  • /bin/sh -c cd /sbin/; cat kill > kill-cpy; cat <SAMPLE_FULL_PATH> > kill
  • /bin/sh -c cd /sbin/; cat cd > cd-cpy; cat <SAMPLE_FULL_PATH> > cd
  • /bin/sh -c cd /sbin/; cat wget > wget-cpy; cat <SAMPLE_FULL_PATH> > wget
Kills the following processes:
  • agetty
  • exim4
  • bash
  • run.sh
  • <SAMPLE>
  • systemd
Performs operations with the file system:
Creates or modifies files:
  • /bin/tftp-cpy
  • /bin/tftp
  • /bin/rm-cpy
  • /bin/rm
  • /bin/kill-cpy
  • /bin/kill
  • /bin/cd-cpy
  • /bin/cd
  • /bin/wget-cpy
  • /sbin/tftp-cpy
  • /sbin/tftp
  • /sbin/rm-cpy
  • /sbin/rm
  • /sbin/kill-cpy
  • /sbin/kill
  • /sbin/cd-cpy
  • /sbin/cd
  • /sbin/wget-cpy
Network activity:
Establishes connection:
  • 8.#.8.8:53
  • 5.###.149.141:9090
Attacks using a special dictionary (brute-force technique) via the Telnet protocol.
Sends data to the following servers:
  • 5.###.149.141:9090
Receives data from the following servers:
  • 5.###.149.141:9090
Other:
Collects information about network activity

Curing recommendations


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