[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.388+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923",Challenge="1599650861/52198d4167c3a9a00e5d361ee7f02dcd",Response="6532c6282320ff82d1005d4123862644",ExpectedResponse=""
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="InvalidAccountID",EventTV="2020-09-09T13:27:41.418+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="10",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923"
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.419+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518
...

[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.388+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923",Challenge="1599650861/52198d4167c3a9a00e5d361ee7f02dcd",Response="6532c6282320ff82d1005d4123862644",ExpectedResponse=""
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="InvalidAccountID",EventTV="2020-09-09T13:27:41.418+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="10",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923"
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.419+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518
...

[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.388+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923",Challenge="1599650861/52198d4167c3a9a00e5d361ee7f02dcd",Response="6532c6282320ff82d1005d4123862644",ExpectedResponse=""
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="InvalidAccountID",EventTV="2020-09-09T13:27:41.418+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="10",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923"
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.419+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518
...

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[2020-07-16 18:26:05] NOTICE[1277] chan_sip.c: Registration from '"543"' failed for '5.183.92.128:52838' - Wrong password
[2020-07-16 18:26:05] SECURITY[1295] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-07-16T18:26:05.073-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="543",SessionID="0x7f175414cf98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/5.183.92.128/52838",Challenge="328762d7",ReceivedChallenge="328762d7",ReceivedHash="f154eae596210d6e27e3ca3700e7b8de"
[2020-07-16 18:32:29] NOTICE[1277] chan_sip.c: Registration from '"544"' failed for '5.183.92.128:37339' - Wrong password
[2020-07-16 18:32:29] SECURITY[1295] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-07-16T18:32:29.083-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="544",SessionID="0x7f17540de808",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/5.183.92.1
...

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\[Apr 12 06:53:33\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:53654' - Wrong password
\[Apr 12 06:54:20\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:59122' - Wrong password
\[Apr 12 06:54:42\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:60576' - Wrong password
\[Apr 12 06:54:48\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:65343' - Wrong password
\[Apr 12 06:55:00\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:59309' - Wrong password
\[Apr 12 06:55:11\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:51353' - Wrong password
\[Apr 12 06:55:31\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.1
...

Has tried to attack my server.

POST /index.php/napisat-nam.html HTTP/1.0 303 - index.phpMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36 OPR/55.0.2994.44

[2020-02-26 22:38:49] NOTICE[14744] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '' failed for '5.183.92.32:64598' (callid: 376215522-649646893-389571818) - Failed to authenticate
[2020-02-26 22:38:49] SECURITY[20721] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-02-26T22:38:49.492+0100",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="376215522-649646893-389571818",LocalAddress="IPV4/UDP/185.118.196.148/5060",RemoteAddress="IPV4/UDP/5.183.92.32/64598",Challenge="1582753129/dad733ecc9e5841b0a1529ab2e7adcda",Response="1de0935f9f82950b6c3e7fb95c212f82",ExpectedResponse=""
[2020-02-26 22:38:49] NOTICE[14744] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '' failed for '5.183.92.32:64598' (callid: 376215522-649646893-389571818) - Failed to authenticate
[2020-02-26 22:38:49] SECURITY[20721] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-02-26T22:38:49.563+0

Unauthorized connection attempt from IP address 148.234.145.18 on Port 445(SMB)

failed_logins

failed_logins

Aug 10 10:44:20 debian sshd\[31390\]: Invalid user oracle from 212.164.219.160 port 39058
Aug 10 10:44:20 debian sshd\[31390\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=212.164.219.160
...

" "

Aug 10 08:35:49 pornomens sshd\[10516\]: Invalid user amadeus from 213.133.3.8 port 47362
Aug 10 08:35:49 pornomens sshd\[10516\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=213.133.3.8
Aug 10 08:35:51 pornomens sshd\[10516\]: Failed password for invalid user amadeus from 213.133.3.8 port 47362 ssh2
...

WordPress XMLRPC scan :: 216.41.232.205 0.248 BYPASS [10/Aug/2019:12:28:12  1000] www.[censored_1] "POST /xmlrpc.php HTTP/1.1" 200 382 "https://www.[censored_1]/" "PHP/6.3.23"

SSH Bruteforce attack

port scan and connect, tcp 81 (hosts2-ns)

Apr 10 05:32:47 vtv3 sshd\[30081\]: Invalid user admin from 185.232.67.53 port 41520
Apr 10 05:32:47 vtv3 sshd\[30081\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.232.67.53
Apr 10 05:32:50 vtv3 sshd\[30081\]: Failed password for invalid user admin from 185.232.67.53 port 41520 ssh2
Apr 10 05:39:36 vtv3 sshd\[32547\]: Invalid user admin from 185.232.67.53 port 60061
Apr 10 05:39:36 vtv3 sshd\[32547\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.232.67.53
Apr 10 21:33:05 vtv3 sshd\[4594\]: Invalid user admin from 185.232.67.53 port 16776
Apr 10 21:33:05 vtv3 sshd\[4594\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.232.67.53
Apr 10 21:33:07 vtv3 sshd\[4594\]: Failed password for invalid user admin from 185.232.67.53 port 16776 ssh2
Apr 10 21:42:52 vtv3 sshd\[9365\]: Invalid user admin from 185.232.67.53 port 20009
Apr 10 21:42:52 vtv3 sshd\[9365\]: pam_unix\(

Scanning (more than 2 packets) random ports - tries to find possible vulnerable services

Aug 10 04:28:53 pornomens sshd\[9611\]: Invalid user steam from 64.150.161.81 port 56030
Aug 10 04:28:53 pornomens sshd\[9611\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=64.150.161.81
Aug 10 04:28:56 pornomens sshd\[9611\]: Failed password for invalid user steam from 64.150.161.81 port 56030 ssh2
...

Triggered by Fail2Ban at Ares web server

Aug  9 20:32:14 localhost kernel: [16641327.457460] iptables_INPUT_denied: IN=eth0 OUT= MAC=f2:3c:91:84:83:95:84:78:ac:57:aa:c1:08:00 SRC=36.228.124.70 DST=[mungedIP2] LEN=40 TOS=0x00 PREC=0x00 TTL=52 ID=55918 PROTO=TCP SPT=58879 DPT=37215 WINDOW=52690 RES=0x00 SYN URGP=0 
Aug  9 20:32:14 localhost kernel: [16641327.457467] iptables_INPUT_denied: IN=eth0 OUT= MAC=f2:3c:91:84:83:95:84:78:ac:57:aa:c1:08:00 SRC=36.228.124.70 DST=[mungedIP2] LEN=40 TOS=0x00 PREC=0x00 TTL=52 ID=55918 PROTO=TCP SPT=58879 DPT=37215 SEQ=758669438 ACK=0 WINDOW=52690 RES=0x00 SYN URGP=0 
Aug  9 22:30:09 localhost kernel: [16648402.872598] iptables_INPUT_denied: IN=eth0 OUT= MAC=f2:3c:91:84:83:95:84:78:ac:57:aa:c1:08:00 SRC=36.228.124.70 DST=[mungedIP2] LEN=40 TOS=0x00 PREC=0x00 TTL=52 ID=64111 PROTO=TCP SPT=58879 DPT=37215 WINDOW=52690 RES=0x00 SYN URGP=0 
Aug  9 22:30:09 localhost kernel: [16648402.872607] iptables_INPUT_denied: IN=eth0 OUT= MAC=f2:3c:91:84:83:95:84:78:ac:57:aa:c1:08:00 SRC=36.228.124.70 DST=[mungedIP2] LEN=40 TOS=0x0

Chat Spam