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Linux.Siggen.5832

Added to the Dr.Web virus database: 2023-10-10

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • /etc/profile.d/bash.cfg.sh
  • /etc/crontab
  • /etc/init.d/apparmor
  • /etc/init.d/cron
  • /etc/init.d/dbus
  • /etc/init.d/hwclock.sh
  • /etc/init.d/kmod
  • /etc/init.d/networking
  • /etc/init.d/procps
  • /etc/init.d/rsyslog
  • /etc/init.d/ssh
  • /etc/init.d/sudo
  • /etc/init.d/udev
  • /etc/init.d/dns-udp4
  • /etc/profile.d/gateway.sh
Creates or modifies the following symlinks:
  • /etc/rc2.d/S01dns-udp4
  • /etc/rc3.d/S01dns-udp4
  • /etc/rc4.d/S01dns-udp4
  • /etc/rc5.d/S01dns-udp4
Malicious functions:
Manages services:
  • ['systemctl', 'daemon-reload']
  • ['systemctl', 'enable', 'quotaon.service']
  • ['systemctl', 'start', 'quotaon.service']
  • ['systemctl', 'list-unit-files', '--full', '--type=socket']
Launches processes:
  • sed -ne s/\x5c.socket\x5cs*[a-z]*\x5cs*$/.socket/p
  • /usr/bin/perl /usr/sbin/update-rc.d dns-udp4 defaults
  • /bin/sh /usr/sbin/service cron start
  • <SAMPLE_FULL_PATH> \x0a
  • mount -o bind /tmp/ /proc/420
  • /bin/bash -c cd /boot;systemctl daemon-reload;systemctl enable quotaon.service;systemctl start quotaon.service;journalctl -xe --no-pager
  • /bin/bash -c echo \x22*/1 * * * * root /.mod \x22 >> /etc/crontab
  • basename /usr/sbin/service
  • journalctl -xe --no-pager
  • /bin/bash -c cd /boot;ausearch -c \x27system.pub\x27 --raw | audit2allow -M my-Systemmod;semodule -X 300 -i my-Systemmod.pp
Performs operations with the file system:
Modifies file access rights:
  • /boot/system.pub
  • /etc/profile.d/bash.cfg
  • /usr/lib/libgdi.so.0.8.2
  • /usr/lib/system.mark
Creates or modifies files:
  • /etc/.cfg
  • /.mod
Deletes files:
  • /etc/.ffff4444
Mounts file systems:
  • /tmp
Changes time of creation/access/modification of files:
  • <SAMPLE_FULL_PATH>
  • /boot/system.pub
  • /etc/profile.d/bash.cfg
  • /usr/lib/libgdi.so.0.8.2
  • /lib/system.mark
  • /etc/init.d/apparmor
  • /etc/init.d/cron
  • /etc/init.d/dbus
  • /etc/init.d/hwclock.sh
  • /etc/init.d/kmod
  • /etc/init.d/networking
  • /etc/init.d/procps
  • /etc/init.d/rsyslog
  • /etc/init.d/ssh
  • /etc/init.d/sudo
  • /etc/init.d/udev

Curing recommendations

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