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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.6092

Added to the Dr.Web virus database: 2023-12-06

Virus description added: 2023-12-06

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/console-setup.sh
/etc/init.d/cron
/etc/init.d/dbus
/etc/init.d/hwclock.sh
/etc/init.d/keyboard-setup.sh
/etc/init.d/kmod
/etc/init.d/networking
/etc/init.d/procps
/etc/init.d/qemu-guest-agent
/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:

Launches itself as a daemon

Replaces the following system files:

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

Manages services:

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

Launches processes:

/usr/bin/perl /usr/sbin/update-rc.d dns-udp4 defaults
/bin/bash -c echo \x22*/1 * * * * root /.mod \x22 >> /etc/crontab
/bin/bash -c cd /boot;ausearch -c \x27system.pub\x27 --raw | audit2allow -M my-Systemmod;semodule -X 300 -i my-Systemmod.pp
/bin/bash -c cd /boot;systemctl daemon-reload;systemctl enable quotaon.service;systemctl start quotaon.service;journalctl -xe --no-pager
journalctl -xe --no-pager
basename /usr/sbin/service
<SAMPLE_FULL_PATH> \x0a
mount -o bind /tmp/ /proc/513
/bin/sh /usr/sbin/service cron start
sed -ne s/\x5c.socket\x5cs*[a-z]*\x5cs*$/.socket/p

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
/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:

/etc/.ffff4444
/etc/.cfg
/boot/system.pub
/usr/lib/libgdi.so.0.8.2
/.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

Deletes files:

/etc/.ffff4444

Mounts file systems:

/tmp

Changes time of creation/access/modification of files:

Network activity:

Establishes connection:

<LOCAL_DNS_SERVER>
45.###.67.250:1234

Sends data to the following servers:

<LOCAL_DNS_SERVER>

Receives data from the following servers:

<LOCAL_DNS_SERVER>

Curing recommendations

Linux

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