Dec 17 15:42:14 mail1 sshd\[7566\]: Invalid user loponen from 178.128.148.98 port 58898
Dec 17 15:42:14 mail1 sshd\[7566\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.148.98
Dec 17 15:42:15 mail1 sshd\[7566\]: Failed password for invalid user loponen from 178.128.148.98 port 58898 ssh2
Dec 17 15:48:42 mail1 sshd\[10490\]: Invalid user web from 178.128.148.98 port 57134
Dec 17 15:48:42 mail1 sshd\[10490\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.148.98
...

MultiHost/MultiPort Probe, Scan, Hack -

Dec 17 15:24:45 grey postfix/smtpd\[15453\]: NOQUEUE: reject: RCPT from stroke.pahlupi.com\[103.242.116.210\]: 554 5.7.1 Service unavailable\; Client host \[103.242.116.210\] blocked using truncate.gbudb.net\; http://www.gbudb.com/truncate/ \[103.242.116.210\]\; from=\ to=\ proto=ESMTP helo=\
...

Dec 17 17:05:42 microserver sshd[6340]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.206.87.230  user=root
Dec 17 17:05:43 microserver sshd[6340]: Failed password for root from 111.206.87.230 port 50200 ssh2
Dec 17 17:12:23 microserver sshd[7298]: Invalid user yajima from 111.206.87.230 port 60988
Dec 17 17:12:23 microserver sshd[7298]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.206.87.230
Dec 17 17:12:24 microserver sshd[7298]: Failed password for invalid user yajima from 111.206.87.230 port 60988 ssh2
Dec 17 17:58:16 microserver sshd[14594]: Invalid user adils from 111.206.87.230 port 55548
Dec 17 17:58:16 microserver sshd[14594]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.206.87.230
Dec 17 17:58:18 microserver sshd[14594]: Failed password for invalid user adils from 111.206.87.230 port 55548 ssh2
Dec 17 18:05:12 microserver sshd[15875]: Invalid user bronco from 11

Dec 17 06:55:22 server sshd\[17437\]: Failed password for invalid user ssh from 197.156.72.154 port 52289 ssh2
Dec 17 18:52:40 server sshd\[28512\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=197.156.72.154  user=root
Dec 17 18:52:43 server sshd\[28512\]: Failed password for root from 197.156.72.154 port 43301 ssh2
Dec 17 19:02:04 server sshd\[31245\]: Invalid user lei from 197.156.72.154
Dec 17 19:02:04 server sshd\[31245\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=197.156.72.154 
...

\[2019-12-17 10:49:28\] NOTICE\[2839\] chan_sip.c: Registration from '\' failed for '156.96.46.203:62374' - Wrong password
\[2019-12-17 10:49:28\] SECURITY\[2857\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-12-17T10:49:28.909-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="667",SessionID="0x7f0fb4121288",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/156.96.46.203/62374",Challenge="05ea2b3c",ReceivedChallenge="05ea2b3c",ReceivedHash="5ccf38c0430c4543431c2052e294d92b"
\[2019-12-17 10:53:07\] NOTICE\[2839\] chan_sip.c: Registration from '\' failed for '156.96.46.203:52257' - Wrong password
\[2019-12-17 10:53:07\] SECURITY\[2857\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-12-17T10:53:07.721-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="668",SessionID="0x7f0fb4a5a908",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/156.96.46.203

Dec 17 19:28:05 debian-2gb-vpn-nbg1-1 kernel: [978451.522610] [UFW BLOCK] IN=eth0 OUT= MAC=96:00:00:38:96:44:d2:74:7f:6e:37:e3:08:00 SRC=40.92.10.76 DST=78.46.192.101 LEN=48 TOS=0x00 PREC=0x00 TTL=105 ID=32217 DF PROTO=TCP SPT=62689 DPT=25 WINDOW=8192 RES=0x00 SYN URGP=0

Dec 17 05:57:05 web1 sshd\[30275\]: Invalid user partho from 36.91.152.234
Dec 17 05:57:05 web1 sshd\[30275\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=36.91.152.234
Dec 17 05:57:08 web1 sshd\[30275\]: Failed password for invalid user partho from 36.91.152.234 port 53896 ssh2
Dec 17 06:05:17 web1 sshd\[31292\]: Invalid user !QAZ\#EDCg from 36.91.152.234
Dec 17 06:05:17 web1 sshd\[31292\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=36.91.152.234

Dec 17 06:32:47 tdfoods sshd\[29405\]: Invalid user themes from 45.80.65.80
Dec 17 06:32:47 tdfoods sshd\[29405\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=45.80.65.80
Dec 17 06:32:49 tdfoods sshd\[29405\]: Failed password for invalid user themes from 45.80.65.80 port 59738 ssh2
Dec 17 06:39:00 tdfoods sshd\[29966\]: Invalid user admin from 45.80.65.80
Dec 17 06:39:00 tdfoods sshd\[29966\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=45.80.65.80

SSH Brute Force, server-1 sshd[19446]: Failed password for root from 222.186.173.238 port 39122 ssh2

Attempt to attack host OS, exploiting network vulnerabilities, on 17-12-2019 14:25:14.

Dec 17 16:29:08 minden010 sshd[3715]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=112.217.207.130
Dec 17 16:29:10 minden010 sshd[3715]: Failed password for invalid user emerald from 112.217.207.130 port 40132 ssh2
Dec 17 16:35:30 minden010 sshd[5820]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=112.217.207.130
...

Dec 17 11:47:25 plusreed sshd[22985]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.113  user=root
Dec 17 11:47:26 plusreed sshd[22985]: Failed password for root from 49.88.112.113 port 54164 ssh2
...

Dec 17 23:47:00 webhost01 sshd[4207]: Failed password for root from 222.186.175.148 port 6294 ssh2
Dec 17 23:47:03 webhost01 sshd[4207]: Failed password for root from 222.186.175.148 port 6294 ssh2
...

Dec 17 14:24:53 mercury wordpress(www.learnargentinianspanish.com)[8451]: XML-RPC authentication attempt for unknown user silvina from 164.73.191.2
...