2020-10-13T06:44:21.356144news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
2020-10-13T06:44:25.395781news0 dovecot[21131]: pop3-login: Aborted login (auth failed, 1 attempts in 4 secs): user=, method=PLAIN, rip=37.49.230.238, lip=95.111.246.42, session=
2020-10-13T06:44:28.401407news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
...

2020-10-13T06:44:21.356144news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
2020-10-13T06:44:25.395781news0 dovecot[21131]: pop3-login: Aborted login (auth failed, 1 attempts in 4 secs): user=, method=PLAIN, rip=37.49.230.238, lip=95.111.246.42, session=
2020-10-13T06:44:28.401407news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
...

Dovecot Invalid User Login Attempt.

Bible

"AmooT";tag=3533393765393339313363340132313832313335333935

\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.624+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffea08d88",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="096f171f",ReceivedChallenge="096f171f",ReceivedHash="b099bdfad5869da4ae2114a56a2b4299"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.759+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffeab8148",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="233a417c",ReceivedChallenge="233a417c",ReceivedHash="0017581d14759d4b5ad3a404ed924131"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.783+0200",Severity="Error",Service="SIP",EventVersion="2",Accoun
...

\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.624+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffea08d88",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="096f171f",ReceivedChallenge="096f171f",ReceivedHash="b099bdfad5869da4ae2114a56a2b4299"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.759+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffeab8148",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="233a417c",ReceivedChallenge="233a417c",ReceivedHash="0017581d14759d4b5ad3a404ed924131"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.783+0200",Severity="Error",Service="SIP",EventVersion="2",Accoun
...

[N1.H1.VM1] Port Scanner Detected Blocked by UFW

SIP Server BruteForce Attack

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

Hellooo

Hellooo

Sep 28 15:49:19 : SSH login attempts with invalid user

SmallBizIT.US 1 packets to tcp(22)

 TCP (SYN) 37.49.230.229:45520 -> port 22, len 44

srvr3: (mod_security) mod_security (id:920350) triggered by 37.49.230.164 (NL/-/circlepole.xyz): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_MODSEC; Logs: 2020/09/26 22:39:25 [error] 324565#0: *1391 [client 37.49.230.164] ModSecurity: Access denied with code 406 (phase 2). Matched "Operator `Rx' with parameter `^[\d.:]+$' against variable `REQUEST_HEADERS:Host'  [redacted] [file "/etc/modsecurity.d/REQUEST-920-PROTOCOL-ENFORCEMENT.conf"] [line "718"] [id "920350"] [rev ""] [msg "Host header is a numeric IP address"] [redacted] [severity "4"] [ver "OWASP_CRS/3.3.0"] [maturity "0"] [accuracy "0"] [tag "application-multi"] [tag "language-multi"] [tag "platform-multi"] [tag "attack-protocol"] [tag "paranoia-level/1"] [tag "OWASP_CRS"] [tag "capec/1000/210/272"] [tag "PCI/6.5.10"] [redacted] [uri "/"] [unique_id "160115276567.272105"] [ref "o0,14v21,14"], client: 37.49.230.164, [redacted] request: "GET / HTTP/1.1" [redacted]

May 15 21:38:33 rotator sshd\[31596\]: Address 27.78.14.83 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!May 15 21:38:33 rotator sshd\[31596\]: Invalid user ftp from 27.78.14.83May 15 21:38:34 rotator sshd\[31598\]: Address 27.78.14.83 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!May 15 21:38:36 rotator sshd\[31596\]: Failed password for invalid user ftp from 27.78.14.83 port 42818 ssh2May 15 21:38:36 rotator sshd\[31598\]: Failed password for root from 27.78.14.83 port 59104 ssh2May 15 21:38:36 rotator sshd\[31605\]: Address 27.78.14.83 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!May 15 21:38:36 rotator sshd\[31605\]: Invalid user admin from 27.78.14.83
...

May 15 20:25:21 debian-2gb-nbg1-2 kernel: \[11825969.088266\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=78.128.112.14 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=246 ID=18856 PROTO=TCP SPT=53911 DPT=23020 WINDOW=1024 RES=0x00 SYN URGP=0

[2020-05-15 15:13:32] NOTICE[1157] chan_sip.c: Registration from '' failed for '192.200.158.118:64876' - Wrong password
[2020-05-15 15:13:32] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-15T15:13:32.868-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="5382",SessionID="0x7f5f100266a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/192.200.158.118/64876",Challenge="28f202d8",ReceivedChallenge="28f202d8",ReceivedHash="84d834a3833f6a04b2b565763d8770e7"
[2020-05-15 15:13:40] NOTICE[1157] chan_sip.c: Registration from '' failed for '192.200.158.118:52859' - Wrong password
[2020-05-15 15:13:40] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-15T15:13:40.028-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="9318",SessionID="0x7f5f10b1c8b8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/192.200
...

34.78.87.135 - - [15/May/2020:06:19:26 -0600] "GET /util/login.aspx HTTP/1.1" 301 509 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Firefox/52.0"
...

May 15 13:23:12 scw-6657dc sshd[28306]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.18.62.124
May 15 13:23:12 scw-6657dc sshd[28306]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.18.62.124
May 15 13:23:14 scw-6657dc sshd[28306]: Failed password for invalid user user from 14.18.62.124 port 39572 ssh2
...

May 16 03:10:45 web1 sshd[692]: Invalid user faxserver from 198.23.148.137 port 57032
May 16 03:10:45 web1 sshd[692]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=198.23.148.137
May 16 03:10:45 web1 sshd[692]: Invalid user faxserver from 198.23.148.137 port 57032
May 16 03:10:48 web1 sshd[692]: Failed password for invalid user faxserver from 198.23.148.137 port 57032 ssh2
May 16 03:19:36 web1 sshd[4224]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=198.23.148.137  user=root
May 16 03:19:38 web1 sshd[4224]: Failed password for root from 198.23.148.137 port 35568 ssh2
May 16 03:23:44 web1 sshd[5242]: Invalid user osm from 198.23.148.137 port 43064
May 16 03:23:44 web1 sshd[5242]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=198.23.148.137
May 16 03:23:44 web1 sshd[5242]: Invalid user osm from 198.23.148.137 port 43064
May 16 03:23:45 web1 sshd[5242]: Failed pas
...

 TCP (SYN) 92.118.160.5:34247 -> port 8333, len 44

SSH Brute Force

May 15 19:38:02 localhost sshd[81288]: Invalid user sharks from 60.30.98.194 port 40689
May 15 19:38:02 localhost sshd[81288]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=60.30.98.194
May 15 19:38:02 localhost sshd[81288]: Invalid user sharks from 60.30.98.194 port 40689
May 15 19:38:04 localhost sshd[81288]: Failed password for invalid user sharks from 60.30.98.194 port 40689 ssh2
May 15 19:44:28 localhost sshd[82078]: Invalid user admin from 60.30.98.194 port 15754
...

detected by Fail2Ban

Invalid user gmodserver from 167.114.115.33 port 52818

20/5/15@08:20:04: FAIL: Alarm-Intrusion address from=122.238.31.167
...

Automatic report - Banned IP Access

2020-05-15T21:08:13.563027afi-git.jinr.ru sshd[30023]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=129.211.26.12  user=root
2020-05-15T21:08:15.182452afi-git.jinr.ru sshd[30023]: Failed password for root from 129.211.26.12 port 50572 ssh2
2020-05-15T21:09:41.561433afi-git.jinr.ru sshd[30421]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=129.211.26.12  user=adm
2020-05-15T21:09:43.926797afi-git.jinr.ru sshd[30421]: Failed password for adm from 129.211.26.12 port 38838 ssh2
2020-05-15T21:11:10.211867afi-git.jinr.ru sshd[30949]: Invalid user support from 129.211.26.12 port 55328
...

May 15 20:16:14 host sshd[30004]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=168-232-198-246.static.konectivatelecomunicacoes.com.br  user=test
May 15 20:16:16 host sshd[30004]: Failed password for test from 168.232.198.246 port 37790 ssh2
...