\[2019-09-27 08:50:00\] NOTICE\[18654\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '81.171.58.182:57613' \(callid: 1333370421-481187802-1858144895\) - Failed to authenticate
\[2019-09-27 08:50:00\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2019-09-27T08:50:00.668+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="\",SessionID="1333370421-481187802-1858144895",LocalAddress="IPV4/UDP/188.40.118.248/5060",RemoteAddress="IPV4/UDP/81.171.58.182/57613",Challenge="1569567000/7daa4da04e4fcc795dbbb2317fc1c580",Response="2967d15325be825f2c26204e596cd8f7",ExpectedResponse=""
\[2019-09-27 08:50:00\] NOTICE\[1168\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '81.171.58.182:57613' \(callid: 1333370421-481187802-1858144895\) - Failed to authenticate
\[2019-09-27 08:50:00\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFa

\[2019-09-26 09:30:40\] NOTICE\[14660\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '81.171.58.182:64769' \(callid: 1832784954-1306307298-904183106\) - Failed to authenticate
\[2019-09-26 09:30:40\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2019-09-26T09:30:40.589+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="\",SessionID="1832784954-1306307298-904183106",LocalAddress="IPV4/UDP/188.40.118.248/5060",RemoteAddress="IPV4/UDP/81.171.58.182/64769",Challenge="1569483040/bdf4b8ac73d03971941b75372ea2e590",Response="f1ef8db92c3dae3a26db31ca2df0a096",ExpectedResponse=""
\[2019-09-26 09:30:40\] NOTICE\[25634\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '81.171.58.182:64769' \(callid: 1832784954-1306307298-904183106\) - Failed to authenticate
\[2019-09-26 09:30:40\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseF

$f2bV_matches

\[2019-10-03 19:55:20\] NOTICE\[1948\] chan_sip.c: Registration from '\' failed for '81.171.58.169:57646' - Wrong password
\[2019-10-03 19:55:20\] SECURITY\[2006\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-03T19:55:20.922-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="14637",SessionID="0x7f1e1c18d4b8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.169/57646",Challenge="41c6b477",ReceivedChallenge="41c6b477",ReceivedHash="2e5fa560951e571b7f09e22fee4f44bf"
\[2019-10-03 19:56:09\] NOTICE\[1948\] chan_sip.c: Registration from '\' failed for '81.171.58.169:55961' - Wrong password
\[2019-10-03 19:56:09\] SECURITY\[2006\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-03T19:56:09.386-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="10287",SessionID="0x7f1e1c2f44f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.17

\[2019-10-03 14:49:02\] NOTICE\[1948\] chan_sip.c: Registration from '\' failed for '81.171.58.169:52231' - Wrong password
\[2019-10-03 14:49:02\] SECURITY\[2006\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-03T14:49:02.044-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="25265",SessionID="0x7f1e1c02d9c8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.169/52231",Challenge="00cc7a4c",ReceivedChallenge="00cc7a4c",ReceivedHash="94e8442ee5d08dada044ff54a8d677c6"
\[2019-10-03 14:49:52\] NOTICE\[1948\] chan_sip.c: Registration from '\' failed for '81.171.58.169:51231' - Wrong password
\[2019-10-03 14:49:52\] SECURITY\[2006\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-03T14:49:52.199-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="10027",SessionID="0x7f1e1c2bed58",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.17

\[2019-10-02 06:17:15\] NOTICE\[1948\] chan_sip.c: Registration from '\' failed for '81.171.58.169:57370' - Wrong password
\[2019-10-02 06:17:15\] SECURITY\[2006\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-02T06:17:15.344-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="19517",SessionID="0x7f1e1c53ea18",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.169/57370",Challenge="28c43c23",ReceivedChallenge="28c43c23",ReceivedHash="aada70f8f75db732e3554136d5b07f4b"
\[2019-10-02 06:17:58\] NOTICE\[1948\] chan_sip.c: Registration from '\' failed for '81.171.58.169:56179' - Wrong password
\[2019-10-02 06:17:58\] SECURITY\[2006\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-02T06:17:58.011-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="23041",SessionID="0x7f1e1d0db3e8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.17

\[2019-09-15 09:23:22\] NOTICE\[20685\] chan_sip.c: Registration from '\' failed for '81.171.58.72:63263' - Wrong password
\[2019-09-15 09:23:22\] SECURITY\[20693\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-15T09:23:22.962-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="2276",SessionID="0x7f8a6c255a88",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.72/63263",Challenge="4e55de05",ReceivedChallenge="4e55de05",ReceivedHash="cf04ec34a09d20b3cdc9c852861fec2b"
\[2019-09-15 09:23:50\] NOTICE\[20685\] chan_sip.c: Registration from '\' failed for '81.171.58.72:55571' - Wrong password
\[2019-09-15 09:23:50\] SECURITY\[20693\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-15T09:23:50.666-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="888",SessionID="0x7f8a6c6094e8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.

\[2019-09-14 21:52:44\] NOTICE\[20685\] chan_sip.c: Registration from '\' failed for '81.171.58.72:60548' - Wrong password
\[2019-09-14 21:52:44\] SECURITY\[20693\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-14T21:52:44.036-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="9520",SessionID="0x7f8a6c6094e8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.72/60548",Challenge="52b9688a",ReceivedChallenge="52b9688a",ReceivedHash="a281472ce410fffe48bc9ccd39403d64"
\[2019-09-14 21:53:09\] NOTICE\[20685\] chan_sip.c: Registration from '\' failed for '81.171.58.72:64462' - Wrong password
\[2019-09-14 21:53:09\] SECURITY\[20693\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-14T21:53:09.754-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="5407",SessionID="0x7f8a6c30ae18",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.5

\[2019-09-13 16:41:25\] NOTICE\[20685\] chan_sip.c: Registration from '\' failed for '81.171.58.72:56754' - Wrong password
\[2019-09-13 16:41:25\] SECURITY\[20693\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-13T16:41:25.281-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="9143",SessionID="0x7f8a6c255a88",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.72/56754",Challenge="376670ac",ReceivedChallenge="376670ac",ReceivedHash="434faa32ad2bc81725ec401c7deb8fbf"
\[2019-09-13 16:41:44\] NOTICE\[20685\] chan_sip.c: Registration from '\' failed for '81.171.58.72:64344' - Wrong password
\[2019-09-13 16:41:44\] SECURITY\[20693\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-13T16:41:44.033-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="7429",SessionID="0x7f8a6c830888",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.5

\[2019-09-12 06:18:34\] NOTICE\[1827\] chan_sip.c: Registration from '\' failed for '81.171.58.72:54054' - Wrong password
\[2019-09-12 06:18:34\] SECURITY\[1849\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-12T06:18:34.792-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="4583",SessionID="0x7fd9a83796a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.72/54054",Challenge="59164cdb",ReceivedChallenge="59164cdb",ReceivedHash="f21fdb2cf9af5c0a596e81f517455a4e"
\[2019-09-12 06:18:54\] NOTICE\[1827\] chan_sip.c: Registration from '\' failed for '81.171.58.72:64181' - Wrong password
\[2019-09-12 06:18:54\] SECURITY\[1849\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-12T06:18:54.624-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="2638",SessionID="0x7fd9a8545448",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.72

\[2019-09-11 18:50:26\] NOTICE\[1827\] chan_sip.c: Registration from '\' failed for '81.171.58.72:54971' - Wrong password
\[2019-09-11 18:50:26\] SECURITY\[1849\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-11T18:50:26.922-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="607",SessionID="0x7fd9a86cbbd8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.72/54971",Challenge="0d0f5554",ReceivedChallenge="0d0f5554",ReceivedHash="10efe34a38d40a417471a14c3864f132"
\[2019-09-11 18:50:49\] NOTICE\[1827\] chan_sip.c: Registration from '\' failed for '81.171.58.72:51668' - Wrong password
\[2019-09-11 18:50:49\] SECURITY\[1849\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-11T18:50:49.882-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="8250",SessionID="0x7fd9a819fa08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.72/5

\[2019-09-10 23:50:29\] NOTICE\[1827\] chan_sip.c: Registration from '\' failed for '81.171.58.72:55568' - Wrong password
\[2019-09-10 23:50:29\] SECURITY\[1849\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-10T23:50:29.432-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="1208",SessionID="0x7fd9a80f66a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.72/55568",Challenge="3c1fdcc0",ReceivedChallenge="3c1fdcc0",ReceivedHash="895b8459047c60e3769489c4be75a7da"
\[2019-09-10 23:50:48\] NOTICE\[1827\] chan_sip.c: Registration from '\' failed for '81.171.58.72:50802' - Wrong password
\[2019-09-10 23:50:48\] SECURITY\[1849\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-09-10T23:50:48.979-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="9432",SessionID="0x7fd9a8c8f538",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.58.72

GPL SNMP public access udp - port: 161 proto: UDP cat: Attempted Information Leak

Port Scan: Events[1] countPorts[1]: 26488 ..

Apr 15 21:46:25 ns392434 sshd[22005]: Invalid user freyna from 114.98.225.210 port 43249
Apr 15 21:46:25 ns392434 sshd[22005]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=114.98.225.210
Apr 15 21:46:25 ns392434 sshd[22005]: Invalid user freyna from 114.98.225.210 port 43249
Apr 15 21:46:27 ns392434 sshd[22005]: Failed password for invalid user freyna from 114.98.225.210 port 43249 ssh2
Apr 15 21:53:06 ns392434 sshd[22239]: Invalid user gatefold from 114.98.225.210 port 54958
Apr 15 21:53:06 ns392434 sshd[22239]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=114.98.225.210
Apr 15 21:53:06 ns392434 sshd[22239]: Invalid user gatefold from 114.98.225.210 port 54958
Apr 15 21:53:08 ns392434 sshd[22239]: Failed password for invalid user gatefold from 114.98.225.210 port 54958 ssh2
Apr 15 21:57:08 ns392434 sshd[22438]: Invalid user write from 114.98.225.210 port 55993

Apr 15 10:00:23 our-server-hostname sshd[24366]: reveeclipse mapping checking getaddrinfo for 194.145.36.59.broad.dg.gd.dynamic.163data.com.cn [59.36.145.194] failed - POSSIBLE BREAK-IN ATTEMPT!
Apr 15 10:00:23 our-server-hostname sshd[24366]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=59.36.145.194  user=r.r
Apr 15 10:00:26 our-server-hostname sshd[24366]: Failed password for r.r from 59.36.145.194 port 42926 ssh2
Apr 15 10:12:09 our-server-hostname sshd[28244]: reveeclipse mapping checking getaddrinfo for 194.145.36.59.broad.dg.gd.dynamic.163data.com.cn [59.36.145.194] failed - POSSIBLE BREAK-IN ATTEMPT!
Apr 15 10:12:09 our-server-hostname sshd[28244]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=59.36.145.194  user=r.r
Apr 15 10:12:11 our-server-hostname sshd[28244]: Failed password for r.r from 59.36.145.194 port 45026 ssh2
Apr 15 10:14:15 our-server-hostname sshd[29297]: reveecl........
-------------------------------

Apr 15 22:49:35 * sshd[25491]: Failed password for root from 222.186.190.2 port 61890 ssh2
Apr 15 22:49:49 * sshd[25491]: error: maximum authentication attempts exceeded for root from 222.186.190.2 port 61890 ssh2 [preauth]

Port Scan: Events[2] countPorts[2]: 5222 3443 ..

Apr 15 22:38:17 markkoudstaal sshd[5927]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.22.9.186
Apr 15 22:38:18 markkoudstaal sshd[5927]: Failed password for invalid user ftpuser from 125.22.9.186 port 36527 ssh2
Apr 15 22:42:27 markkoudstaal sshd[6596]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.22.9.186

Port Scan: Events[3] countPorts[3]: 1900 80 12345 ..

2020-04-15T16:05:41.4037121495-001 sshd[4718]: Invalid user teamspeak from 193.112.190.102 port 40372
2020-04-15T16:05:42.8106181495-001 sshd[4718]: Failed password for invalid user teamspeak from 193.112.190.102 port 40372 ssh2
2020-04-15T16:09:45.8773331495-001 sshd[4908]: Invalid user edu from 193.112.190.102 port 59872
2020-04-15T16:09:45.8809611495-001 sshd[4908]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.112.190.102
2020-04-15T16:09:45.8773331495-001 sshd[4908]: Invalid user edu from 193.112.190.102 port 59872
2020-04-15T16:09:48.4443491495-001 sshd[4908]: Failed password for invalid user edu from 193.112.190.102 port 59872 ssh2
...

ET CINS Active Threat Intelligence Poor Reputation IP group 4 - port: 28274 proto: TCP cat: Misc Attack

ET CINS Active Threat Intelligence Poor Reputation IP group 57 - port: 17051 proto: TCP cat: Misc Attack

Apr 15 20:08:07 srv01 sshd[13772]: Invalid user bos from 167.99.41.242 port 40356
Apr 15 20:08:07 srv01 sshd[13772]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.99.41.242
Apr 15 20:08:07 srv01 sshd[13772]: Invalid user bos from 167.99.41.242 port 40356
Apr 15 20:08:09 srv01 sshd[13772]: Failed password for invalid user bos from 167.99.41.242 port 40356 ssh2
Apr 15 20:12:07 srv01 sshd[14118]: Invalid user wkuser from 167.99.41.242 port 47020
...

slow and persistent scanner

Automatic report - Port Scan Attack

Apr 15 23:16:42 debian sshd[12615]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=148.66.134.85 
Apr 15 23:16:44 debian sshd[12615]: Failed password for invalid user store from 148.66.134.85 port 39988 ssh2
Apr 15 23:20:22 debian sshd[12620]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=148.66.134.85