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Linux.BackDoor.Fgt.2016

Added to the Dr.Web virus database: 2019-02-19

Virus description added:

Technical Information

Malicious functions:
Launches itself as a daemon
Modifies firewall settings:
  • iptables -F
Launches processes:
  • sh -c grep -c ^processor /proc/cpuinfo
  • grep -c ^processor /proc/cpuinfo
  • sh -c free -mt|grep \"Total:\"|awk '{print $2}'|head -n1
  • grep Total:
  • free -mt
  • head -n1
  • awk {print $2}
  • sh -c if [ -f /usr/bin/yum ]; then cat /etc/system-release|head -n1; elif [ -f /usr/bin/apt-get ]; then lsb_release -d|awk '{$1= \"\"; print $0}'|head -n1;fi
  • awk {$1= \"\"; print $0}
  • lsb_release -d
  • sh -c if [ -f /usr/bin/yum ]; then printf \"Centos/Rhel Based\"; elif [ -f /usr/bin/apt-get ]; then printf \"Debian/Ubuntu Based\";fi
  • sh -c rm -rf /tmp/* /var/tmp/* /tmp/.* /var/tmp/.*
  • rm -rf /tmp/* /var/tmp/* /tmp/. /tmp/.. /tmp/.ICE-unix /tmp/.Test-unix /tmp/.X11-unix /tmp/.XIM-unix /tmp/.font-unix /var/tmp/. /var/tmp/..
  • sh -c rm -rf /var/log/wtmp
  • rm -rf /var/log/wtmp
  • sh -c rm -rf /bin/netstat
  • rm -rf /bin/netstat
  • sh -c iptables -F
Performs operations with the file system:
Creates or modifies files:
  • /etc/resolv.conf
Deletes files:
  • /tmp/*
  • /var/tmp/*
  • /var/log/wtmp
  • /bin/netstat
Network activity:
Establishes connection:
  • 8.#.8.8:53
  • 31.###.157.206:17769
Attacks using a special dictionary (brute-force technique) via the Telnet protocol.
Sends data to the following servers:
  • 31.###.157.206:17769
Receives data from the following servers:
  • 31.###.157.206:17769
Other:
Collects CPU information
Collects RAM information

Curing recommendations


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