Mar 12 03:52:16 124388 sshd[11103]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.89.130.231
Mar 12 03:52:16 124388 sshd[11103]: Invalid user ocean from 159.89.130.231 port 40922
Mar 12 03:52:18 124388 sshd[11103]: Failed password for invalid user ocean from 159.89.130.231 port 40922 ssh2
Mar 12 03:54:02 124388 sshd[11122]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.89.130.231  user=root
Mar 12 03:54:04 124388 sshd[11122]: Failed password for root from 159.89.130.231 port 45984 ssh2

ENG,DEF GET /w00tw00t.at.ISC.SANS.DFind:)

Mar 12 11:25:17 webhost01 sshd[2973]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.65.159.81
Mar 12 11:25:19 webhost01 sshd[2973]: Failed password for invalid user watari from 159.65.159.81 port 32884 ssh2
...

(sshd) Failed SSH login from 175.100.146.176 (IN/India/Karnataka/Bengaluru/176-146-100-175.static.youbroadband.in/[AS18207 YOU Broadband & Cable India Ltd.]): 1 in the last 3600 secs

Mar 12 04:54:36 mail sshd\[9518\]: Invalid user admin from 103.122.111.202
Mar 12 04:54:36 mail sshd\[9518\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.122.111.202
Mar 12 04:54:38 mail sshd\[9518\]: Failed password for invalid user admin from 103.122.111.202 port 62395 ssh2
...

$f2bV_matches | Triggered by Fail2Ban at Vostok web server

Mar 12 05:57:55 SilenceServices sshd[30582]: Failed password for root from 179.124.34.9 port 43310 ssh2
Mar 12 06:02:15 SilenceServices sshd[5755]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=179.124.34.9
Mar 12 06:02:17 SilenceServices sshd[5755]: Failed password for invalid user Tlhua from 179.124.34.9 port 49760 ssh2

CMS (WordPress or Joomla) login attempt.

SSH bruteforce more then 50 syn to 22 port per 10 seconds.

80.82.77.86 was recorded 18 times by 11 hosts attempting to connect to the following ports: 12111,32768,10000. Incident counter (4h, 24h, all-time): 18, 77, 9887

Mar 12 04:46:05 l03 sshd[20105]: Invalid user user1 from 103.62.31.98 port 20303
...

Sql/code injection probe

[2020-03-12 02:21:02] NOTICE[1148] chan_sip.c: Registration from '' failed for '185.147.215.8:51649' - Wrong password
[2020-03-12 02:21:02] SECURITY[1163] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-03-12T02:21:02.291-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="1464",SessionID="0x7fd82ca9d388",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.147.215.8/51649",Challenge="41d24dd8",ReceivedChallenge="41d24dd8",ReceivedHash="040af8922dc0d361e3fcbd167c58a3c6"
[2020-03-12 02:21:24] NOTICE[1148] chan_sip.c: Registration from '' failed for '185.147.215.8:60555' - Wrong password
[2020-03-12 02:21:24] SECURITY[1163] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-03-12T02:21:24.189-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="2704",SessionID="0x7fd82c3f03d8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.147.215.8
...

2020-03-12 06:28:12 dovecot_login authenticator failed for \(User\) \[185.36.81.57\]: 535 Incorrect authentication data \(set_id=administrator@no-server.de\)
2020-03-12 06:33:56 dovecot_login authenticator failed for \(User\) \[185.36.81.57\]: 535 Incorrect authentication data \(set_id=administrator@no-server.de\)
2020-03-12 06:34:05 dovecot_login authenticator failed for \(User\) \[185.36.81.57\]: 535 Incorrect authentication data \(set_id=administrator@no-server.de\)
2020-03-12 06:34:06 dovecot_login authenticator failed for \(User\) \[185.36.81.57\]: 535 Incorrect authentication data \(set_id=administrator@no-server.de\)
2020-03-12 06:37:07 dovecot_login authenticator failed for \(User\) \[185.36.81.57\]: 535 Incorrect authentication data \(set_id=seminole\)
...

$f2bV_matches