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Linux.Siggen.3867

Added to the Dr.Web virus database: 2021-05-01

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/init.d/sysetmd792d80b2
  • /etc/init.d/.depend.boot
  • /etc/init.d/.depend.start
  • /etc/init.d/.depend.stop
  • /etc/cron.hourly/cron.sh
  • /etc/crontab
Creates or modifies the following symlinks:
  • /etc/rc1.d/S90sysetmd792d80b2
  • /etc/rc2.d/S90sysetmd792d80b2
  • /etc/rc3.d/S90sysetmd792d80b2
  • /etc/rc4.d/S90sysetmd792d80b2
  • /etc/rc5.d/S90sysetmd792d80b2
  • /etc/rc1.d/S01sysetmd792d80b2
  • /etc/rc2.d/S01sysetmd792d80b2
  • /etc/rc3.d/S01sysetmd792d80b2
  • /etc/rc4.d/S01sysetmd792d80b2
  • /etc/rc5.d/S01sysetmd792d80b2
Malicious functions:
Launches itself as a daemon
Manages services:
  • update-rc.d sysetmd792d80b2 defaults
  • systemctl daemon-reload
Launches processes:
  • sh -c chattr -i /bin/sysetmd792d80b2
  • chattr -i /bin/sysetmd792d80b2
  • sh -c chattr +i /bin/sysetmd792d80b2
  • chattr +i /bin/sysetmd792d80b2
  • sh -c chkconfig --add sysetmd792d80b2
  • sh -c update-rc.d sysetmd792d80b2 defaults
  • /sbin/insserv sysetmd792d80b2
  • sh -c sed -i '/\/etc\/cron.hourly\/cron.sh/d' /etc/crontab ; echo '*/3 * * * * root /etc/cron.hourly/cron.sh' >> /etc/crontab
  • sed -i /\/etc\/cron.hourly\/cron.sh/d /etc/crontab
  • sh -c sed -i '/\/bin\/sysetmd792d80b2/d' /root/.profile; echo '/bin/sysetmd792d80b2 d > /dev/null 2>&1' >> /root/.profile
  • sed -i /\/bin\/sysetmd792d80b2/d /root/.profile
  • sh -c sed -i '/\/bin\/sysetmd792d80b2/d' /root/.bashrc; echo '/bin/sysetmd792d80b2 d > /dev/null 2>&1' >> /root/.bashrc
  • sed -i /\/bin\/sysetmd792d80b2/d /root/.bashrc
  • /bin/sysetmd792d80b2
  • sh -c sed -i '/\/etc\/cron.hourly\/cron.sh/d' /etc/crontab
  • sh -c sed -i '/\/bin\/sysetmd792d80b2/d' /root/.profile
  • sh -c sed -i '/\/bin\/sysetmd792d80b2/d' /root/.bashrc
Performs operations with the file system:
Modifies file access rights:
  • /tmp/.systemd
  • /tmp/.systemd/792d80b2
  • /bin/sysetmd792d80b2
  • /etc/sedxEXwD9
  • /root/sedeswRjm
  • /root/sed5XtEez
  • /etc/sedORBR2g
  • /root/sed9e5PHF
  • /root/sedysBYm8
  • /etc/sedI1m1vX
  • /root/sednqRN1j
  • /root/sedEOuQVx
Creates folders:
  • /tmp/.systemd
  • /tmp/.systemd/792d80b2
Creates or modifies files:
  • /bin/sysetmd792d80b2
  • /etc/sedxEXwD9
  • /root/sedeswRjm
  • /root/.profile
  • /root/sed5XtEez
  • /root/.bashrc
  • /tmp/.systemd/792d80b2/systemd.lockroot
  • <SAMPLE_FULL_PATH>tmp
  • /etc/sedORBR2g
  • /root/sed9e5PHF
  • /root/sedysBYm8
  • /etc/sedI1m1vX
  • /root/sednqRN1j
  • /root/sedEOuQVx
Deletes files:
  • /bin/sysetmd792d80b2
  • /etc/rc1.d/S90sysetmd792d80b2
  • /etc/rc2.d/S90sysetmd792d80b2
  • /etc/rc3.d/S90sysetmd792d80b2
  • /etc/rc4.d/S90sysetmd792d80b2
  • /etc/rc5.d/S90sysetmd792d80b2
  • /etc/rc.d/rc1.d/S90sysetmd792d80b2
  • /etc/rc.d/rc2.d/S90sysetmd792d80b2
  • /etc/rc.d/rc3.d/S90sysetmd792d80b2
  • /etc/rc.d/rc4.d/S90sysetmd792d80b2
  • /etc/rc.d/rc5.d/S90sysetmd792d80b2
  • /etc/cron.hourly/cron.sh
Locks files:
  • /tmp/.systemd/792d80b2/systemd.lockroot

Curing recommendations


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