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Linux.Siggen.6732

Added to the Dr.Web virus database: 2024-03-14

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/init.d/knlib
  • /var/spool/cron/crontabs/root
  • /etc/cron.d/.lib-knlib4
  • /etc/cron.hourly/.lib-knlib4
  • /etc/cron.daily/.lib-knlib4
  • /etc/cron.weekly/.lib-knlib4
  • /etc/cron.monthly/.lib-knlib4
Malicious functions:
Manages services:
  • ['systemctl', 'daemon-reload']
  • ['systemctl', 'enable', 'knlibe.service']
Launches processes:
  • pgrep -f klibsystem4
  • cp -f -r -- /bin/knlib5 /bin/klibsystem5
  • bash -c ufw disable
  • chattr +ia /var/spool/cron/.lib-knlib4
  • rm -rf -- klibsystem5
  • chattr +ia /bin/knlib5
  • chattr +ia /etc/systemd/system/knlibe.service
  • chattr +ia /etc/init.d/knlib
  • chattr +ia /etc/cron.weekly/.lib-knlib4
  • /usr/bin/pgrep pkill -f .klibsystem5
  • /bin/bash /etc/init.d/knlib start
  • bash -c echo \x22* * * * * /tmp/.klibsystem5 >/dev/null 2>&1\x22 | crontab -
  • crontab -
  • chattr +ia /etc/cron.d/.lib-knlib4
  • chattr +ia /etc/cron.daily/.lib-knlib4
  • chattr +ia /etc/cron.hourly/.lib-knlib4
  • pgrep -f klibsystem5
  • crontab -r
  • /usr/bin/pgrep pkill -f .klibsystem4
  • nohup ./klibsystem5
  • chattr +ia /etc/cron.monthly/.lib-knlib4
Performs operations with the file system:
Modifies file access rights:
  • /etc/init.d/knlib
  • /usr/bin/knlib5
  • /var/spool/cron/crontabs/tmp.YTm7K8
Creates or modifies files:
  • /etc/systemd/system/knlibe.service
  • /usr/bin/knlib5
  • /tmp/.klibsystem5
  • /var/tmp/.klibsystem5-x
  • /var/spool/cron/crontabs/tmp.YTm7K8
  • /var/spool/cron/.lib-knlib4
Changes time of creation/access/modification of files:
  • /var/spool/cron/crontabs
Network activity:
Awaits incoming connections on ports:
  • 127.0.0.1:59475
Establishes connection:
  • 8.#.8.8:53
  • 5.##.80.215:80
  • 18#.##2.128.146:443
DNS ASK:
  • ru#.#ck-dns.ws
Sends data to the following servers:
  • 18#.##2.128.146:443
Receives data from the following servers:
  • 18#.##2.128.146:443
Other:
Collects OS information
Collects CPU information

Curing recommendations


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