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Linux.Mirai.4271

Added to the Dr.Web virus database: 2020-04-24

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/init.d/rek
  • /etc/init.d/.depend.boot
  • /etc/init.d/.depend.start
  • /etc/init.d/.depend.stop
Creates or modifies the following symlinks:
  • /etc/rc0.d/K02exim4
  • /etc/rc0.d/K08umountfs
  • /etc/rc0.d/K05umountnfs.sh
  • /etc/rc0.d/K03sendsigs
  • /etc/rc0.d/K04rsyslog
  • /etc/rc0.d/K07networking
  • /etc/rc0.d/K07hwclock.sh
  • /etc/rc0.d/K06rpcbind
  • /etc/rc0.d/K10halt
  • /etc/rc0.d/K09umountroot
  • /etc/rc0.d/K06nfs-common
  • /etc/rc0.d/K01rek
  • /etc/rc1.d/K02exim4
  • /etc/rc1.d/K04rsyslog
  • /etc/rc1.d/K06rpcbind
  • /etc/rc1.d/K06nfs-common
  • /etc/rc1.d/K01rek
  • /etc/rc2.d/S02rek
  • /etc/rc3.d/S02rek
  • /etc/rc4.d/S02rek
  • /etc/rc5.d/S02rek
  • /etc/rc6.d/K02exim4
  • /etc/rc6.d/K08umountfs
  • /etc/rc6.d/K05umountnfs.sh
  • /etc/rc6.d/K03sendsigs
  • /etc/rc6.d/K04rsyslog
  • /etc/rc6.d/K07networking
  • /etc/rc6.d/K07hwclock.sh
  • /etc/rc6.d/K06rpcbind
  • /etc/rc6.d/K09umountroot
  • /etc/rc6.d/K10reboot
  • /etc/rc6.d/K06nfs-common
  • /etc/rc6.d/K01rek
Malicious functions:
Substitutes application name for:
  • 1217326141982648
Manages services:
  • update-rc.d rek defaults
  • systemctl daemon-reload
Launches processes:
  • sh -c mv yama.* /etc; mv /etc/yama.* /etc/ocd; echo -e '#!/bin/bas
  • mv yama.* /etc
  • mv /etc/yama.* /etc/ocd
  • chmod +x /etc/init.d/rek
  • /sbin/insserv rek
  • rm -rf .bash_history
  • rm -rf /root/.bash_history
Performs operations with the file system:
Modifies file access rights:
  • /etc/init.d/rek
Deletes files:
  • /etc/rc0.d/K01exim4
  • /etc/rc0.d/K07umountfs
  • /etc/rc0.d/K04umountnfs.sh
  • /etc/rc0.d/K02sendsigs
  • /etc/rc0.d/K03rsyslog
  • /etc/rc0.d/K06networking
  • /etc/rc0.d/K06hwclock.sh
  • /etc/rc0.d/K05rpcbind
  • /etc/rc0.d/K09halt
  • /etc/rc0.d/K08umountroot
  • /etc/rc0.d/K05nfs-common
  • /etc/rc1.d/K01exim4
  • /etc/rc1.d/K03rsyslog
  • /etc/rc1.d/K05rpcbind
  • /etc/rc1.d/K05nfs-common
  • /etc/rc6.d/K01exim4
  • /etc/rc6.d/K07umountfs
  • /etc/rc6.d/K04umountnfs.sh
  • /etc/rc6.d/K02sendsigs
  • /etc/rc6.d/K03rsyslog
  • /etc/rc6.d/K06networking
  • /etc/rc6.d/K06hwclock.sh
  • /etc/rc6.d/K05rpcbind
  • /etc/rc6.d/K08umountroot
  • /etc/rc6.d/K09reboot
  • /etc/rc6.d/K05nfs-common
  • /root/.bash_history
Network activity:
Establishes connection:
  • 8.#.8.8:53

Curing recommendations

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