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Linux.Siggen.3744

Added to the Dr.Web virus database: 2021-03-11

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:
  • mpkibht8vqia3epg14b1
Launches processes:
  • sh -c (crontab -l | grep -v \"/<SAMPLE_FULL_PATH>\" | grep -v \"/sh5\" | grep -v \"/init5\" | grep -v \"/bash5\" | grep -v \"no cron\" > /var/run/.hh21804289383) > /dev/null 2>&1
  • crontab -l
  • grep -v /sh5
  • grep -v /init5
  • grep -v /<SAMPLE_FULL_PATH>
  • grep -v /bash5
  • grep -v no cron
  • sh -c crontab /var/run/.hh21804289383
  • crontab /var/run/.hh21804289383
  • sh -c /bin/uname -n
  • /bin/uname -n
Performs operations with the file system:
Modifies file access rights:
  • /root/sh5
  • /var/tmp/bash5
  • /run/bash5
  • /run/lock/sh5
  • /dev/shm/sh5
  • /tmp/sh5
  • /var/spool/cron/crontabs/tmp.K2OI5l
Creates or modifies files:
  • /var/run/.hh21804289383
  • /root/sh5
  • /run/.hh21804289383
  • /var/tmp/bash5
  • /var/run/bash5
  • /run/bash5
  • /var/lock/sh5
  • /run/lock/sh5
  • /dev/shm/sh5
  • /tmp/sh5
  • /var/spool/cron/crontabs/tmp.K2OI5l
Deletes files:
  • /var/run/.hh21804289383
Network activity:
Awaits incoming connections on ports:
  • 127.0.0.1:47302
Establishes connection:
  • <LOCAL_DNS_SERVER>
  • 5.###.84.159:8080
DNS ASK:
  • du##.giraffe.su

Curing recommendations


Linux

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