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Linux.Siggen.4257

Added to the Dr.Web virus database: 2021-11-03

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /var/spool/cron/crontabs/root
Malicious functions:
Launches itself as a daemon
Manages services:
  • systemctl enable --now libexecs
Launches processes:
  • sh -c whoami
  • whoami
  • sh -c echo $HOM
  • sh -c which crontab
  • which crontab
  • sh -c crontab -l 2>&1
  • crontab -l
  • sh -c crontab /tmp/CN3X5e0rNfOsH
  • crontab /tmp/CN3X5e0rNfOsH
  • sh -c which systemctl
  • which systemctl
  • sh -c systemctl enable --now libexecs 2>&1
  • /bin/libexecs (null
  • sh -c cat /etc/machine-id 2>/dev/null
  • cat /etc/machine-id
Performs operations with the file system:
Modifies file access rights:
  • /var/spool/cron/crontabs/tmp.7OL3gB
Creates or modifies files:
  • /bin/libexecs
  • /tmp/CN3X5e0rNfOsH
  • /var/spool/cron/crontabs/tmp.7OL3gB
  • /lib/systemd/system/multi-user.target.wants/libexecs.service
  • /lib/systemd/system/libexecs.service
  • /etc/systemd/system/multi-user.target.wants/libexecs.service
  • /etc/systemd/system/libexecs.service
Deletes files:
  • /tmp/CN3X5e0rNfOsH
Network activity:
DNS ASK:
  • 2.##################-sme.4af1f833219a43f8b7b95071c25e58ab.0.124.getTasks

Curing recommendations


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