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Linux.Siggen.3380

Added to the Dr.Web virus database: 2020-11-11

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/init.d/netdns
  • /etc/init.d/.depend.boot
  • /etc/init.d/.depend.start
  • /etc/init.d/.depend.stop
Creates or modifies the following symlinks:
  • /etc/rc0.d/K01netdns
  • /etc/rc1.d/K01netdns
  • /etc/rc2.d/S01netdns
  • /etc/rc3.d/S01netdns
  • /etc/rc4.d/S01netdns
  • /etc/rc5.d/S01netdns
  • /etc/rc6.d/K01netdns
Malicious functions:
Compiles a program from source codes:
  • gcc /usr/local/lib/libcset.c -Wall -shared -fPIC -ldl -o /usr/local/lib/libcset.so
Manages services:
  • systemctl enable netdns
  • /usr/sbin/update-rc.d netdns defaults
  • systemctl daemon-reload
  • /usr/sbin/update-rc.d netdns enable
Launches processes:
  • /bin/bash -c chattr -i /etc/ld.so.preload
  • chattr -i /etc/ld.so.preload
  • /bin/bash -c chattr -i /usr/lib/systemd/system/netdns.service
  • chattr -i /usr/lib/systemd/system/netdns.service
  • /bin/bash -c chkconfig --add netdns
  • /bin/bash -c systemctl enable netdns
  • /sbin/insserv netdns
  • /bin/bash -c chattr -i /tmp/kthrotlds
  • chattr -i /tmp/kthrotlds
  • /bin/bash -c chattr -i /tmp/ksoftirqds
  • chattr -i /tmp/ksoftirqds
  • /bin/bash -c gcc /usr/local/lib/libcset.c -Wall -shared -fPIC -ldl -o /usr/local/lib/libcset.so
Performs operations with the file system:
Creates or modifies files:
  • /tmp/.lsdpid
  • /usr/sbin/kthrotlds
  • /usr/lib/systemd/system/netdns.service
  • /usr/local/lib/libcset.c
  • /tmp/ccCcQoIB.s
Deletes files:
  • /etc/ld.so.preload
  • /tmp/kthrotlds
  • /tmp/ksoftirqds
Other:
Collects RAM information

Curing recommendations


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