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Linux.Siggen.1542

Added to the Dr.Web virus database: 2019-03-26

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/inittab
  • /var/spool/cron/crontabs/root
  • /etc/rc.local
Malicious functions:
Substitutes application name for:
  • q3prwq3rduqqh2tr73c3
Modifies router settings:
  • /bin/nvram
Launches processes:
  • sh -c cat /etc/inittab | grep -v \"<SAMPLE_FULL_PATH>\" > /etc/inittab2
  • sh -c crontab -l | grep <SAMPLE_FULL_PATH> || (crontab -l ; echo \"* * * * * <SAMPLE_FULL_PATH> > /dev/null 2>&1 &\") | crontab - > /dev/null 2>&1 &
  • cat /etc/inittab
  • grep <SAMPLE_FULL_PATH>
  • crontab -l
  • grep -v <SAMPLE_FULL_PATH>
  • sh -c echo \"0:2345:respawn:<SAMPLE_FULL_PATH>\" >> /etc/inittab2
  • sh -c cat /etc/inittab2 > /etc/inittab
  • crontab -
  • cat /etc/inittab2
  • sh -c rm -rf /etc/inittab2
  • rm -rf /etc/inittab2
  • sh -c touch -acmr /bin/ls /etc/inittab
  • touch -acmr /bin/ls /etc/inittab
  • sh -c cp -f <SAMPLE_FULL_PATH> /dev/shm/<SAMPLE>
  • sh -c /bin/uname -n
  • sh -c nvram get router_name
  • cp -f <SAMPLE_FULL_PATH> /dev/shm/<SAMPLE>
  • /bin/uname -n
  • sh -c cat /etc/inittab | grep -v \"/dev/shm/<SAMPLE>\" > /etc/inittab2
  • sh -c crontab -l | grep /dev/shm/<SAMPLE> || (crontab -l ; echo \"* * * * * /dev/shm/<SAMPLE> > /dev/null 2>&1 &\") | crontab - > /dev/null 2>&1 &
  • grep /dev/shm/<SAMPLE>
  • grep -v /dev/shm/<SAMPLE>
  • sh -c echo \"0:2345:respawn:/dev/shm/<SAMPLE>\" >> /etc/inittab2
  • sh -c cp -f <SAMPLE_FULL_PATH> /var/tmp/<SAMPLE>
  • cp -f <SAMPLE_FULL_PATH> /var/tmp/<SAMPLE>
  • sh -c cat /etc/inittab | grep -v \"/var/tmp/<SAMPLE>\" > /etc/inittab2
  • sh -c crontab -l | grep /var/tmp/<SAMPLE> || (crontab -l ; echo \"* * * * * /var/tmp/<SAMPLE> > /dev/null 2>&1 &\") | crontab - > /dev/null 2>&1 &
  • grep /var/tmp/<SAMPLE>
  • grep -v /var/tmp/<SAMPLE>
  • sh -c echo \"0:2345:respawn:/var/tmp/<SAMPLE>\" >> /etc/inittab2
  • sh -c cp -f <SAMPLE_FULL_PATH> /var/lock/<SAMPLE>
  • cp -f <SAMPLE_FULL_PATH> /var/lock/<SAMPLE>
  • sh -c cat /etc/inittab | grep -v \"/var/lock/<SAMPLE>\" > /etc/inittab2
  • sh -c crontab -l | grep /var/lock/<SAMPLE> || (crontab -l ; echo \"* * * * * /var/lock/<SAMPLE> > /dev/null 2>&1 &\") | crontab - > /dev/null 2>&1 &
  • grep /var/lock/<SAMPLE>
  • grep -v /var/lock/<SAMPLE>
  • sh -c echo \"0:2345:respawn:/var/lock/<SAMPLE>\" >> /etc/inittab2
  • sh -c cp -f <SAMPLE_FULL_PATH> /var/run/<SAMPLE>
  • cp -f <SAMPLE_FULL_PATH> /var/run/<SAMPLE>
  • sh -c cat /etc/inittab | grep -v \"/var/run/<SAMPLE>\" > /etc/inittab2
  • sh -c crontab -l | grep /var/run/<SAMPLE> || (crontab -l ; echo \"* * * * * /var/run/<SAMPLE> > /dev/null 2>&1 &\") | crontab - > /dev/null 2>&1 &
  • grep /var/run/<SAMPLE>
  • grep -v /var/run/<SAMPLE>
  • sh -c echo \"0:2345:respawn:/var/run/<SAMPLE>\" >> /etc/inittab2
Performs operations with the file system:
Modifies file access rights:
  • /var/spool/cron/crontabs/tmp.ELhYfG
  • /var/spool/cron/crontabs/tmp.5EhYeZ
  • /var/spool/cron/crontabs/tmp.Ba8QVX
  • /var/spool/cron/crontabs/tmp.ngBqhd
  • /var/spool/cron/crontabs/tmp.cdSz8g
Creates or modifies files:
  • /etc/inittab2
  • /var/spool/cron/crontabs/tmp.ELhYfG
  • /dev/shm/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.5EhYeZ
  • /var/tmp/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.Ba8QVX
  • /var/lock/<SAMPLE>
  • /run/lock/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.ngBqhd
  • /var/run/<SAMPLE>
  • /run/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.cdSz8g
Deletes files:
  • /etc/inittab2
Locks files:
  • /tmp/.bawtz
Network activity:
Awaits incoming connections on ports:
  • 127.0.0.1:59000
Establishes connection:
  • <LOCAL_DNS_SERVER>
Connects to the following servers over the IRC protocol:
  • Server: 46.##9.233.35; Command: NICK M|b|0|6391931|unknown\nUSER muhstik localhost localhost :muhstik-11052018\n
  • Server: 46.##9.233.35; Command: PONG :14A81B56\n
  • Server: 46.##9.233.35; Command: PONG :E9099D34\n
  • Server: 46.##9.233.35; Command: PONG :9A7D559D\n
  • Server: 46.##9.233.35; Command: PONG :5E637771\n
  • Server: 46.##9.233.35; Command: PONG :9CCB92E\n
  • Server: 18#.#1.149.22; Command: NICK M|b|0|6391931|unknown\nUSER muhstik localhost localhost :muhstik-11052018\n
  • Server: 18#.#1.149.22; Command: PONG :226F9C5C\n
  • Server: 18#.#1.149.22; Command: MODE M|b|0|6391931|unknown -xi\n
  • Server: 18#.#1.149.22; Command: JOIN #em :8974\n
  • Server: 18#.#1.149.22; Command: WHO M|b|0|6391931|unknown\n
DNS ASK:
  • ir#.####schland-zahlung.net
  • ir#.##-zahlung.eu

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