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Linux.DDoS.140

Added to the Dr.Web virus database: 2017-06-07

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/init.d/wake
  • /etc/init.d/.depend.boot
  • /etc/init.d/.depend.start
  • /etc/init.d/.depend.stop
Creates or modifies the following symlinks:
  • /etc/rc0.d/K01wake
  • /etc/rc1.d/K01wake
  • /etc/rc2.d/S01wake
  • /etc/rc3.d/S01wake
  • /etc/rc4.d/S01wake
  • /etc/rc5.d/S01wake
  • /etc/rc6.d/K01wake
Malicious functions:
Gains root privileges
Substitutes application name for:
Manages services:
  • update-rc.d wake defaults 99
  • systemctl daemon-reload
Launches processes:
  • sh -c ulimit -n 3000
  • sh -c update-rc.d wake defaults 99
  • /sbin/insserv wake
  • sh -c chkconfig --add wake
  • sh -c chkconfig wake on
  • sh -c nohup /usr/bin/wake -c 1 &
  • nohup /usr/bin/wake -c 1
  • /usr/bin/wake -c 1
  • grep :39999
  • netstat -nlp
  • sh -c uname -a
  • uname -a
  • sleep 600
Performs operations with the file system:
Modifies file access rights:
  • /usr/bin/wake
  • /etc/init.d/wake
Creates or modifies files:
  • /usr/bin/wake
Network activity:
Awaits incoming connections on ports:
  • 127.0.0.1:39999
Establishes connection:
  • 23.###.55.210:2018
DNS ASK:
  • ap#.#zyrh.com
Sends data to the following servers:
  • 23.###.55.210:2018
Other:
Collects CPU information

Curing recommendations


Linux

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