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Linux.Siggen.3784
Added to the Dr.Web virus database:
2021-03-17
Virus description added:
2021-03-17
Technical Information
To ensure autorun and distribution:
Creates or modifies the following files:
/var/spool/cron/crontabs/root
/etc/inittab
/etc/rc.local
Malicious functions:
Launches itself as a daemon
Modifies router settings:
Launches processes:
sh -c chmod 700 <SAMPLE_FULL_PATH> > /dev/null 2>&1 &
sh -c touch -acmr /bin/ls <SAMPLE_FULL_PATH>
chmod 700 <SAMPLE_FULL_PATH>
touch -acmr /bin/ls <SAMPLE_FULL_PATH>
sh -c (crontab -l | grep -v \"<SAMPLE_FULL_PATH>\" | grep -v \"no cron\" | grep -v \"lesshts/run.sh\" > /var/run/.x00740882966) > /dev/null 2>&1
crontab -l
grep -v no cron
grep -v <SAMPLE_FULL_PATH>
grep -v lesshts/run.sh
sh -c echo \"* * * * * <SAMPLE_FULL_PATH> > /dev/null 2>&1 &\" >> /var/run/.x00740882966
sh -c crontab /var/run/.x00740882966
crontab /var/run/.x00740882966
sh -c rm -rf /var/run/.x00740882966
rm -rf /var/run/.x00740882966
sh -c cat /etc/inittab | grep -v \"<SAMPLE_FULL_PATH>\" > /etc/inittab2
cat /etc/inittab
sh -c echo \"0:2345:respawn:<SAMPLE_FULL_PATH>\" >> /etc/inittab2
sh -c cat /etc/inittab2 > /etc/inittab
cat /etc/inittab2
sh -c rm -rf /etc/inittab2
rm -rf /etc/inittab2
sh -c touch -acmr /bin/ls /etc/inittab
touch -acmr /bin/ls /etc/inittab
sh -c /bin/uname -n
sh -c nvram get router_name
/bin/uname -n
Performs operations with the file system:
Modifies file access rights:
<SAMPLE_FULL_PATH>
/var/spool/cron/crontabs/tmp.wsGgyS
Creates or modifies files:
/var/run/.x00740882966
/run/.x00740882966
/var/spool/cron/crontabs/tmp.wsGgyS
/etc/inittab2
Deletes files:
/var/run/.x00740882966
/etc/inittab2
Network activity:
Awaits incoming connections on ports:
Establishes connection:
21#.##3.199.98:8080
19#.##.172.42:8080
10#.#.46.2:8080
19#.##.197.29:8080
Curing recommendations
Linux
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