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Linux.Siggen.1601

Added to the Dr.Web virus database: 2019-04-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/cron.hourly/rootd
  • /etc/cron.daily/logrotatedmn
  • /etc/cron.weekly/crontabtimer
  • /etc/cron.monthly/log
  • /etc/crontab
  • /etc/cron.d/root
  • /var/spool/cron/crontabs/root
Malicious functions:
Launches itself as a daemon
Launches processes:
  • cp <SAMPLE_FULL_PATH> /etc/cron.hourly/rootd
  • chmod +x /etc/cron.hourly/rootd
  • touch -acmr /bin/sh /etc/cron.hourly/rootd
  • chattr +i /etc/cron.hourly/rootd
  • cp <SAMPLE_FULL_PATH> /etc/cron.daily/logrotatedmn
  • chmod +x /etc/cron.daily/logrotatedmn
  • touch -acmr /bin/sh /etc/cron.daily/logrotatedmn
  • chattr +i /etc/cron.daily/logrotatedmn
  • cp <SAMPLE_FULL_PATH> /etc/cron.weekly/crontabtimer
  • chmod +x /etc/cron.weekly/crontabtimer
  • touch -acmr /bin/sh /etc/cron.weekly/crontabtimer
  • chattr +i /etc/cron.weekly/crontabtimer
  • cp <SAMPLE_FULL_PATH> /etc/cron.monthly/log
  • chmod +x /etc/cron.monthly/log
  • touch -acmr /bin/sh /etc/cron.monthly/log
  • chattr +i /etc/cron.monthly/log
  • cp <SAMPLE_FULL_PATH> /bin/syslogdmn
  • chmod +x /bin/syslogdmn
  • touch -acmr /bin/sh /bin/syslogdmn
  • chattr +i /bin/syslogdmn
  • cp <SAMPLE_FULL_PATH> /sbin/syslogdmn
  • chmod +x /sbin/syslogdmn
  • touch -acmr /bin/sh /sbin/syslogdmn
  • chattr +i /sbin/syslogdmn
  • cp <SAMPLE_FULL_PATH> /usr/bin/syslogdmn
  • chmod +x /usr/bin/syslogdmn
  • touch -acmr /bin/sh /usr/bin/syslogdmn
  • chattr +i /usr/bin/syslogdmn
  • cp <SAMPLE_FULL_PATH> /usr/sbin/syslogdmn
  • chmod +x /usr/sbin/syslogdmn
  • touch -acmr /bin/sh /usr/sbin/syslogdmn
  • chattr +i /usr/sbin/syslogdmn
  • cp <SAMPLE_FULL_PATH> /usr/local/bin/syslogdmn
  • chmod +x /usr/local/bin/syslogdmn
  • touch -acmr /bin/sh /usr/local/bin/syslogdmn
  • chattr +i /usr/local/bin/syslogdmn
  • cp <SAMPLE_FULL_PATH> /usr/local/sbin/syslogdmn
  • chmod +x /usr/local/sbin/syslogdmn
  • touch -acmr /bin/sh /usr/local/sbin/syslogdmn
  • chattr +i /usr/local/sbin/syslogdmn
  • sh /tmp/root/run_script/eZnyMFmDFM.sh
  • sed -i $d /etc/crontab
  • sh /tmp/root/run_script/t4B3GcenNt.sh
  • sh /tmp/root/run_script/qtBsfSoaxF.sh
  • sh /tmp/root/run_script/y4EkB0ApUo.sh
  • sh /tmp/root/run_script/in844ubRGi.sh
  • sh /tmp/root/run_script/UR93HfE915.sh
  • sh /tmp/root/run_script/HKdyloNZaF.sh
  • touch -acmr /bin/sh /etc/crontab
  • touch -acmr /bin/sh /etc/cron.d/root
  • touch -acmr /bin/sh /var/spool/cron/root
  • touch -acmr /bin/sh /var/spool/crontabs/root
  • sh /tmp/root/run_script/0DCs7V9ddl.sh
  • nohup /bin/syslogdmn
  • /bin/syslogdmn
  • bash /tmp/root/run_script/Kxn8hKfLuH.sh
  • ps aux
  • grep -i [a]liyun
  • grep -i [y]unjing
Performs operations with the file system:
Modifies file access rights:
  • /etc/cron.hourly/rootd
  • /etc/cron.daily/logrotatedmn
  • /etc/cron.weekly/crontabtimer
  • /etc/cron.monthly/log
  • /bin/syslogdmn
  • /sbin/syslogdmn
  • /usr/bin/syslogdmn
  • /usr/sbin/syslogdmn
  • /usr/local/bin/syslogdmn
  • /usr/local/sbin/syslogdmn
  • /etc/sedStnlZQ
Creates folders:
  • /tmp/root
  • /tmp/root/run_script
Creates or modifies files:
  • /bin/syslogdmn
  • /sbin/syslogdmn
  • /usr/bin/syslogdmn
  • /usr/sbin/syslogdmn
  • /usr/local/bin/syslogdmn
  • /usr/local/sbin/syslogdmn
  • /tmp/root/run_script/eZnyMFmDFM.sh
  • /etc/sedStnlZQ
  • /tmp/root/run_script/t4B3GcenNt.sh
  • /var/spool/cron/root
  • /tmp/root/run_script/qtBsfSoaxF.sh
  • /tmp/root/run_script/y4EkB0ApUo.sh
  • /tmp/root/run_script/in844ubRGi.sh
  • /tmp/root/run_script/UR93HfE915.sh
  • /tmp/root/run_script/HKdyloNZaF.sh
  • /tmp/root/run_script/0DCs7V9ddl.sh
  • /tmp/root/run_script/Kxn8hKfLuH.sh
Deletes files:
  • /tmp/root/run_script/eZnyMFmDFM.sh
  • /tmp/root/run_script/t4B3GcenNt.sh
  • /tmp/root/run_script/qtBsfSoaxF.sh
  • /tmp/root/run_script/y4EkB0ApUo.sh
  • /tmp/root/run_script/in844ubRGi.sh
  • /tmp/root/run_script/UR93HfE915.sh
  • /tmp/root/run_script/HKdyloNZaF.sh
  • /tmp/root/run_script/0DCs7V9ddl.sh
Other:
Collects OS information
Collects CPU information
Collects RAM information
Collects information about network activity

Curing recommendations


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