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Linux.Siggen.2804

Added to the Dr.Web virus database: 2020-05-04

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /var/spool/cron/crontabs/root
  • /etc/init.d/siejrfn
  • /etc/init.d/<SAMPLE>
Malicious functions:
Launches itself as a daemon
Substitutes application name for:
  • /var/Sofia
Modifies firewall settings:
  • iptables -F
Launches processes:
  • sh -c iptables -F >/dev/null 2>&1
  • sh -c crontab -l > BadDdCba
  • crontab -l
  • sh -c (crontab -l 2>/dev/null; echo '@reboot <SAMPLE_FULL_PATH> None.reboot') | crontab -
  • crontab -
  • sh -c cp <SAMPLE_FULL_PATH> /etc/init.d
  • cp <SAMPLE_FULL_PATH> /etc/init.d
Performs operations with the file system:
Modifies file access rights:
  • /var/spool/cron/crontabs/tmp.86wXUN
Creates or modifies files:
  • /root/BadDdCba
  • /var/spool/cron/crontabs/tmp.86wXUN
Deletes files:
  • /var/spool/cron/BadDdCba
  • /dev/zero
Network activity:
Awaits incoming connections on ports:
  • 0.0.0.0:9105
Establishes connection:
  • 8.#.8.8:53
  • 37.##.226.209:28344
Attacks using a special dictionary (brute-force technique) via the Telnet protocol.

Curing recommendations


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