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Linux.Siggen.3524

Added to the Dr.Web virus database: 2021-01-15

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/init.d/.depend.boot
  • /etc/init.d/.depend.start
  • /etc/init.d/.depend.stop
  • /etc/init.d/durex
Creates or modifies the following symlinks:
  • /etc/rc0.d/K01durex
  • /etc/rc1.d/K01durex
  • /etc/rc2.d/S02durex
  • /etc/rc3.d/S02durex
  • /etc/rc4.d/S02durex
  • /etc/rc5.d/S02durex
  • /etc/rc6.d/K01durex
Malicious functions:
Launches itself as a daemon
Manages services:
  • update-rc.d -f durex remove
  • systemctl daemon-reload
  • update-rc.d durex defaults
  • update-rc.d durex enable
Launches processes:
  • sh -c chmod 777 /usr/sbin/Durex
  • chmod 777 /usr/sbin/Durex
  • sh -c /usr/sbin/Durex
  • /usr/sbin/Durex
  • sh -c xxd -r -p /usr/local/lib/durex.so /usr/local/lib/durex.so
  • xxd -r -p /usr/local/lib/durex.so /usr/local/lib/durex.so
  • sh -c update-rc.d -f durex remove
  • /sbin/insserv -f
  • sh -c chmod +x /etc/init.d/durex
  • chmod +x /etc/init.d/durex
  • sh -c update-rc.d durex defaults
  • /sbin/insserv durex
  • sh -c update-rc.d durex enable
Performs operations with the file system:
Modifies file access rights:
  • /usr/sbin/Durex
  • /etc/init.d/durex
Creates or modifies files:
  • /usr/sbin/Durex
  • /usr/local/lib/durex.so
  • /etc/ld.so.preload
Deletes files:
  • /usr/sbin/Durex
  • /usr/local/lib/durex.so
  • /etc/ld.so.preload
  • /etc/init.d/durex
Network activity:
Awaits incoming connections on ports:
  • 0.0.0.0:3001

Curing recommendations


Linux

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