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Linux.Siggen.1300

Added to the Dr.Web virus database: 2018-12-19

Virus description added:

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:
  • lml1uesfldmg0ll6vra4vacplmwp
Launches processes:
  • sh -c crontab -l | grep <SAMPLE_FULL_PATH> || (crontab -l ; echo \"* * * * * <SAMPLE_FULL_PATH> > /dev/null 2>&1 &\") | crontab - > /dev/null 2>&1 &
  • sh -c cp -f <SAMPLE_FULL_PATH> /dev/shm/<SAMPLE>
  • crontab -l
  • grep <SAMPLE_FULL_PATH>
  • cp -f <SAMPLE_FULL_PATH> /dev/shm/<SAMPLE>
  • crontab -
  • sh -c crontab -l | grep /dev/shm/<SAMPLE> || (crontab -l ; echo \"* * * * * /dev/shm/<SAMPLE> > /dev/null 2>&1 &\") | crontab - > /dev/null 2>&1 &
  • sh -c cp -f <SAMPLE_FULL_PATH> /var/tmp/<SAMPLE>
  • grep /dev/shm/<SAMPLE>
  • cp -f <SAMPLE_FULL_PATH> /var/tmp/<SAMPLE>
  • sh -c crontab -l | grep /var/tmp/<SAMPLE> || (crontab -l ; echo \"* * * * * /var/tmp/<SAMPLE> > /dev/null 2>&1 &\") | crontab - > /dev/null 2>&1 &
  • sh -c cp -f <SAMPLE_FULL_PATH> /var/lock/<SAMPLE>
  • grep /var/tmp/<SAMPLE>
  • cp -f <SAMPLE_FULL_PATH> /var/lock/<SAMPLE>
  • sh -c crontab -l | grep /var/lock/<SAMPLE> || (crontab -l ; echo \"* * * * * /var/lock/<SAMPLE> > /dev/null 2>&1 &\") | crontab - > /dev/null 2>&1 &
  • sh -c cp -f <SAMPLE_FULL_PATH> /var/run/<SAMPLE>
  • grep /var/lock/<SAMPLE>
  • cp -f <SAMPLE_FULL_PATH> /var/run/<SAMPLE>
  • 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>
Kills the following processes:
  • <SAMPLE>
Performs operations with the file system:
Modifies file access rights:
  • /var/spool/cron/crontabs/tmp.5WawbV
  • /var/spool/cron/crontabs/tmp.RVBXvM
  • /var/spool/cron/crontabs/tmp.HL9tTC
  • /var/spool/cron/crontabs/tmp.GQdJcA
  • /var/spool/cron/crontabs/tmp.pTK6bd
Creates or modifies files:
  • /dev/shm/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.5WawbV
  • /var/tmp/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.RVBXvM
  • /var/lock/<SAMPLE>
  • /run/lock/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.HL9tTC
  • /var/run/<SAMPLE>
  • /run/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.GQdJcA
  • /var/spool/cron/crontabs/tmp.pTK6bd
Network activity:
Awaits incoming connections on ports:
  • 127.0.0.1:48101
Establishes connection:
  • 8.#.8.8:53
Connects to the following servers over the IRC protocol:
  • Server: 46.##9.233.35; Command: NICK i686|1|799241|box-i386 \n
  • Server: 46.##9.233.35; Command: USER mb localhost 0 :2018 \n
  • Server: 46.##9.233.35; Command: PONG :BC2474F8 \n
  • Server: 46.##9.233.35; Command: JOIN #i \n
Other:
Collects CPU information

Curing recommendations


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