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アンチウイルスに関する誤解と噂

アンチウイルスに関する誤解

ニュース

Linux.Siggen.5972

Added to the Dr.Web virus database: 2023-11-10

Virus description added: 2023-11-10

Technical Information

To ensure autorun and distribution:

Creates or modifies the following files:

/etc/profile.d/bash_cfg
/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/profile.d/gateway.sh

Malicious functions:

Launches itself as a daemon

Replaces the following system files:

/usr/bin/ps
/usr/bin/ss
/usr/bin/lsof

Manages services:

['systemctl', 'list-unit-files', '--full', '--type=socket']
['systemctl', 'start', 'crond.service']
['systemctl', 'daemon-reload']
['systemctl', 'enable', 'quotaoff.service']
['systemctl', 'start', 'quotaoff.service']
['systemctl', 'start', 'cron.service']

Launches processes:

/bin/sh /usr/sbin/service crond start
/bin/bash -c echo \x22*/1 * * * * root /.mod \x22 >> /etc/crontab
journalctl -xe --no-pager
/bin/bash -c /etc/32676&
mount -o bind /tmp/ /proc/485
/bin/bash -c cd /boot;systemctl daemon-reload;systemctl enable quotaoff.service;systemctl start quotaoff.service;journalctl -xe --no-pager
/bin/sh /usr/sbin/service cron start
/bin/bash -c cd /boot;ausearch -c \x27System.mod\x27 --raw | audit2allow -M my-Systemmod;semodule -X 300 -i my-Systemmod.pp
sed -ne s/\x5c.socket\x5cs*[a-z]*\x5cs*$/.socket/p
<SAMPLE_FULL_PATH> \x0a
renice -20 485
basename /usr/sbin/service

Performs operations with the file system:

Modifies file access rights:

/etc/opt.services.cfg
/etc/32676
/boot/System.mod
/etc/profile.d/bash_cfg
/usr/lib/libgdi.so.0.8.1
/usr/lib/system-mark
/usr/bin/include/ps
/usr/bin/include/ss
/usr/bin/include/ls
/usr/bin/include/dir
/usr/bin/include/find
/usr/bin/include/lsof
/usr/bin/ps
/usr/bin/ss
/usr/bin/ls
/usr/bin/dir
/usr/bin/find
/usr/bin/lsof

Creates folders:

/usr/bin/include

Creates or modifies files:

/dev/.walk.lod
/etc/.walk
/dev/.old
/dev/.img
/etc/opt.services.cfg
/etc/32676
/boot/System.mod
/usr/lib/systemd/system/quotaoff.service
/usr/lib/libgdi.so.0.8.1
/.mod
/usr/lib/system-mark
/usr/bin/include/ps
/usr/bin/include/ss
/usr/bin/include/ls
/usr/bin/include/dir
/usr/bin/include/find
/usr/bin/include/lsof
/usr/bin/ls
/usr/bin/dir
/usr/bin/find
/dev/watchdog
/dev/misc/watchdog

Locks files:

/dev/.walk.lod
/dev/.img

Mounts file systems:

/tmp

Changes time of creation/access/modification of files:

/etc/opt.services.cfg
/boot/System.mod
/etc/profile.d/bash_cfg
/usr/lib/libgdi.so.0.8.1
/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
<SAMPLE_FULL_PATH>
/usr/bin/include/ps
/usr/bin/include/ss
/usr/bin/include/ls
/usr/bin/include/dir
/usr/bin/include/find
/usr/bin/include/lsof
/usr/bin/ps
/usr/bin/ss
/usr/bin/ls
/usr/bin/dir
/usr/bin/find
/usr/bin/lsof

Network activity:

Establishes connection:

<LOCAL_DNS_SERVER>
8.#.8.8:53
21#.##1.244.61:888
0.0.0.0:0

Sends data to the following servers:

<LOCAL_DNS_SERVER>
8.#.8.8:53

Receives data from the following servers:

<LOCAL_DNS_SERVER>
8.#.8.8:53

Curing recommendations

Linux

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