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
Substitutes application name for:
- [kworker/Z69:0]
Modifies firewall settings:
- iptables -F
Manages services:
- systemctl -p CanReload show cron.service
- systemctl -p LoadState show cron.service
- /bin/systemctl start cron.service
Launches processes:
- sh -c iptables -F >/dev/null 2>&1
- sh -c /etc/init.d/cron start >/dev/null 2>&1
- /etc/init.d/cron start
- run-parts --lsbsysinit --list /lib/lsb/init-functions.d
- readlink -f /etc/init.d/cron
- sh -c /etc/init.d/crond start >/dev/null 2>&1
- /etc/init.d/crond start
- sh -c crontab -l > CDbDcc
- 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
Kills system processes:
- sshd
Kills the following processes:
- exim4
- /etc/init.d/cron
- /bin/sh
- /bin/cp
- <SAMPLE>
Performs operations with the file system:
Modifies file access rights:
- /var/spool/cron/crontabs/tmp.Itx4Df
Creates or modifies files:
- /root/CDbDcc
- /var/spool/cron/crontabs/tmp.Itx4Df
Deletes files:
- /var/spool/cron/CDbDcc
Network activity:
Awaits incoming connections on ports:
- 0.0.0.0:9178
Establishes connection:
- 8.#.8.8:53
- 37.##.226.209:9992
- 37.##.226.209:28344
Attacks using a special dictionary (brute-force technique) via the Telnet protocol.
