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Linux.Siggen.1739

Added to the Dr.Web virus database: 2019-05-26

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
Malicious functions:
Launches itself as a daemon
Compiles a program from source codes:
  • gcc -Wall -fPIC -shared -o libsystemdpre.so libsystemdpre.c -ldl
Launches processes:
  • chmod +x /etc/cron.hourly/rootd
  • chattr +i /etc/cron.hourly/rootd
  • chmod +x /etc/cron.daily/logrotatedmn
  • chattr +i /etc/cron.daily/logrotatedmn
  • chmod +x /etc/cron.weekly/crontabtimer
  • chattr +i /etc/cron.weekly/crontabtimer
  • chmod +x /etc/cron.monthly/log
  • chattr +i /etc/cron.monthly/log
  • cp <SAMPLE_FULL_PATH> /bin/syslogdmn
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
  • /tmp/libsystemdpre.so
  • /usr/lib/libsystemdpre.so
Creates folders:
  • /etc/cron.hourly:
  • /etc/cron.hourly:/etc
  • /etc/cron.hourly:/etc/cron.daily
Creates or modifies files:
  • /etc/ld.so.preload
  • /tmp/libsystemdpre.c
  • /tmp/cc1YY9xx.s
  • /tmp/ccwgw9nb.o
  • /tmp/ccJ2o8oQ.res
  • /tmp/ccWwrO9T.c
  • /tmp/cc57kHtz.o
  • /tmp/ccqo1MNe.ld
  • /tmp/ccxJBi8T.le
  • /tmp/libsystemdpre.so
  • /usr/lib/libsystemdpre.so
  • /bin/syslogdmn
Deletes files:
  • /tmp/ccqo1MNe.ld
  • /tmp/ccxJBi8T.le
  • /tmp/ccWwrO9T.c
  • /tmp/cc57kHtz.o
  • /tmp/ccJ2o8oQ.res
  • /tmp/ccwgw9nb.o
  • /tmp/cc1YY9xx.s
  • /tmp/libsystemdpre.c
  • /tmp/libsystemdpre.so
Other:
Collects OS information
Collects RAM information

Curing recommendations


Linux

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