[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/
...

DATE:2020-07-14 05:56:19, IP:37.49.230.201, PORT:telnet Telnet brute force auth on honeypot server (honey-neo-dc)

Jun 18 05:53:44 mellenthin postfix/smtpd[28137]: NOQUEUE: reject: RCPT from unknown[37.49.230.201]: 554 5.7.1 Service unavailable; Client host [37.49.230.201] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/37.49.230.201; from= to= proto=ESMTP helo=

Bible

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.

"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

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]

frenzy

Jul 11 16:37:18 l03 sshd[12541]: Invalid user xa from 49.232.155.37 port 33544
...

2020-07-11T15:57:45.163201abusebot-8.cloudsearch.cf sshd[15597]: Invalid user lishan from 196.1.97.216 port 46522
2020-07-11T15:57:45.170533abusebot-8.cloudsearch.cf sshd[15597]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=196.1.97.216
2020-07-11T15:57:45.163201abusebot-8.cloudsearch.cf sshd[15597]: Invalid user lishan from 196.1.97.216 port 46522
2020-07-11T15:57:47.742924abusebot-8.cloudsearch.cf sshd[15597]: Failed password for invalid user lishan from 196.1.97.216 port 46522 ssh2
2020-07-11T15:59:46.981063abusebot-8.cloudsearch.cf sshd[15653]: Invalid user user from 196.1.97.216 port 48242
2020-07-11T15:59:46.987080abusebot-8.cloudsearch.cf sshd[15653]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=196.1.97.216
2020-07-11T15:59:46.981063abusebot-8.cloudsearch.cf sshd[15653]: Invalid user user from 196.1.97.216 port 48242
2020-07-11T15:59:48.836846abusebot-8.cloudsearch.cf sshd[15653]: Failed passw
...

Brute-force attempt banned

Jul 11 19:47:03 pkdns2 sshd\[35320\]: Invalid user rooot from 211.35.76.241Jul 11 19:47:05 pkdns2 sshd\[35320\]: Failed password for invalid user rooot from 211.35.76.241 port 51718 ssh2Jul 11 19:49:00 pkdns2 sshd\[35384\]: Invalid user tokamak from 211.35.76.241Jul 11 19:49:02 pkdns2 sshd\[35384\]: Failed password for invalid user tokamak from 211.35.76.241 port 36055 ssh2Jul 11 19:50:56 pkdns2 sshd\[35508\]: Invalid user gavril from 211.35.76.241Jul 11 19:50:58 pkdns2 sshd\[35508\]: Failed password for invalid user gavril from 211.35.76.241 port 48628 ssh2
...

2020-07-09 17:08:40 server sshd[23553]: Failed password for invalid user hongbinglie from 51.83.57.157 port 56170 ssh2

Jul 11 18:31:31 sip sshd[905245]: Invalid user xushan from 54.38.33.178 port 55276
Jul 11 18:31:33 sip sshd[905245]: Failed password for invalid user xushan from 54.38.33.178 port 55276 ssh2
Jul 11 18:37:48 sip sshd[905297]: Invalid user bluebird from 54.38.33.178 port 54474
...

Invalid user xm from 192.241.235.11 port 44160

Jul 11 18:34:59 server sshd[1698]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=162.196.204.142
Jul 11 18:35:01 server sshd[1698]: Failed password for invalid user lihao from 162.196.204.142 port 35574 ssh2
Jul 11 18:39:49 server sshd[2496]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=162.196.204.142
...

B: Abusive ssh attack

Invalid user irc from 193.112.72.251 port 44748

Jul 11 16:01:20 sigma sshd\[15836\]: Invalid user meza from 104.131.190.193Jul 11 16:01:23 sigma sshd\[15836\]: Failed password for invalid user meza from 104.131.190.193 port 58665 ssh2
...

Invalid user liangbin from 140.143.3.28 port 54182

Fail2Ban Ban Triggered

2020-07-11T16:04:05.500854abusebot-2.cloudsearch.cf sshd[1280]: Invalid user pellegrini from 187.191.96.60 port 40568
2020-07-11T16:04:05.506610abusebot-2.cloudsearch.cf sshd[1280]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=187.191.96.60
2020-07-11T16:04:05.500854abusebot-2.cloudsearch.cf sshd[1280]: Invalid user pellegrini from 187.191.96.60 port 40568
2020-07-11T16:04:07.913247abusebot-2.cloudsearch.cf sshd[1280]: Failed password for invalid user pellegrini from 187.191.96.60 port 40568 ssh2
2020-07-11T16:11:48.410801abusebot-2.cloudsearch.cf sshd[1392]: Invalid user jeff from 187.191.96.60 port 32932
2020-07-11T16:11:48.420991abusebot-2.cloudsearch.cf sshd[1392]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=187.191.96.60
2020-07-11T16:11:48.410801abusebot-2.cloudsearch.cf sshd[1392]: Invalid user jeff from 187.191.96.60 port 32932
2020-07-11T16:11:50.054990abusebot-2.cloudsearch.cf sshd[1392]: F
...