Linux.Siggen.2341

Technical Information

To ensure autorun and distribution:

Creates or modifies the following files:

/etc/cron.d/root
/var/spool/cron/crontabs/root
/etc/init.d/sshservice
/etc/init.d/.depend.boot
/etc/init.d/.depend.start
/etc/init.d/.depend.stop

Creates or modifies the following symlinks:

/etc/rc0.d/K01sshservice
/etc/rc1.d/K01sshservice
/etc/rc2.d/S01sshservice
/etc/rc3.d/S01sshservice
/etc/rc4.d/S01sshservice
/etc/rc5.d/S01sshservice
/etc/rc6.d/K01sshservice

Malicious functions:

Launches itself as a daemon

Manages services:

systemctl enable sshservice.service
/usr/sbin/update-rc.d sshservice defaults
systemctl daemon-reload
/usr/sbin/update-rc.d sshservice enable

Launches processes:

<SAMPLE_FULL_PATH> [mds]
<SAMPLE_FULL_PATH> [kdevtmpfds]
/bin/sh -c export PATH=$PATH:/bin:/usr/bin:/sbin:/usr/local/bin:/usr/sbin;chkconfig --add sshservice
/bin/sh -c export PATH=$PATH:/bin:/usr/bin:/sbin:/usr/local/bin:/usr/sbin;systemctl enable sshservice.service;systemctl reload sshservice.service
/sbin/insserv sshservice

Performs operations with the file system:

Modifies file access rights:

/etc/cron.d/root
/var/spool/cron/root
/var/spool/cron/crontabs/root

Creates symlinks:

/etc/systemd/system/multi-user.target.wants/sshservice.service

Creates or modifies files:

/usr/local/sbin/<SAMPLE>
/var/spool/cron/root
/usr/lib/systemd/system/sshservice.service
/lib/systemd/system/sshservice.service
/etc/systemd/system/sshservice.service

Network activity:

Awaits incoming connections on ports:

127.0.0.1:61131

Establishes connection:

<LOCAL_DNS_SERVER>
127.0.0.1:61131
21#.#39.36.21:9
21#.#39.38.21:9
21#.#39.32.21:9
21#.#39.34.21:9
95.##1.0.0:6379
95.###.0.35:8080
95.##1.0.0:8161
95.##1.0.1:6379
95.##1.0.1:8161
95.##1.0.1:8080
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95.##1.0.2:8161
95.##1.0.2:8080
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95.##1.0.6:8080
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95.##1.0.7:8080
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95.###.0.166:8161
95.###.0.73:8161

Attacks using a special dictionary (brute-force technique) via the SSH protocol

HTTP GET requests:

if###fig.me/

DNS ASK:

cr##.#######bety6vifaxsi9vovnc9jjay2l.com
if##nfig.me

Tecnologías

Términos

Formación y educación

Mitos

Technical Information

Curing recommendations