Invalid user zabbix from 104.248.58.71 port 49576

03/21/2020-03:39:26.266417 185.175.93.27 Protocol: 6 ET DROP Dshield Block Listed Source group 1

2020-03-20 22:50:56 H=(k7dVyR) [60.169.94.134]:62378 I=[192.147.25.65]:25 F= rejected RCPT <2129823216@qq.com>: RBL: found in thrukfz5b56tq6xao6odgdyjrq.zen.dq.spamhaus.net (127.0.0.2, 127.0.0.11, 127.0.0.4, 127.0.0.3) (https://www.spamhaus.org/sbl/query/SBL468331)
2020-03-20 22:51:04 dovecot_login authenticator failed for (L4jh7QZ) [60.169.94.134]:62798 I=[192.147.25.65]:25: 535 Incorrect authentication data (set_id=hkcdtsradxes@lerctr.org)
2020-03-20 22:51:14 dovecot_login authenticator failed for (teZouEX) [60.169.94.134]:63677 I=[192.147.25.65]:25: 535 Incorrect authentication data (set_id=hkcdtsradxes@lerctr.org)
...

Mar 21 03:48:47 ws24vmsma01 sshd[68683]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.233.134.31
Mar 21 03:48:49 ws24vmsma01 sshd[68683]: Failed password for invalid user pheobe from 49.233.134.31 port 50530 ssh2
...

2020-03-21T07:48:23.936544v22018076590370373 sshd[1283]: Invalid user rainbow from 93.28.128.108 port 34624
2020-03-21T07:48:23.941332v22018076590370373 sshd[1283]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=93.28.128.108
2020-03-21T07:48:23.936544v22018076590370373 sshd[1283]: Invalid user rainbow from 93.28.128.108 port 34624
2020-03-21T07:48:25.967904v22018076590370373 sshd[1283]: Failed password for invalid user rainbow from 93.28.128.108 port 34624 ssh2
2020-03-21T07:52:05.785198v22018076590370373 sshd[27674]: Invalid user lizhihao from 93.28.128.108 port 53660
...

Unauthorised access (Mar 21) SRC=175.5.158.189 LEN=40 TTL=52 ID=5550 TCP DPT=8080 WINDOW=56254 SYN 
Unauthorised access (Mar 21) SRC=175.5.158.189 LEN=40 TTL=52 ID=49233 TCP DPT=8080 WINDOW=32934 SYN

Port 8551 scan denied

Mar 21 04:42:09 cloud sshd[25194]: Failed password for admin from 118.24.149.248 port 50968 ssh2
Mar 21 04:51:10 cloud sshd[25503]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.24.149.248

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Mar 21 01:40:26 ny01 sshd[22231]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.136.173.103
Mar 21 01:40:28 ny01 sshd[22231]: Failed password for invalid user sites from 46.136.173.103 port 40679 ssh2
Mar 21 01:44:53 ny01 sshd[24057]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.136.173.103

Invalid user rox from 138.204.24.16 port 37375

Attempt to attack host OS, exploiting network vulnerabilities, on 21-03-2020 03:50:15.

Invalid user rr from 111.229.164.224 port 58770

$f2bV_matches | Triggered by Fail2Ban at Vostok web server

FTP brute-force attack