Postfix Brute-Force reported by Fail2Ban

Unauthorised access (Aug 21) SRC=185.40.4.228 LEN=40 TTL=249 ID=33647 DF TCP DPT=8080 WINDOW=512 SYN

IP: 185.40.4.10
Ports affected
    HTTP protocol over TLS/SSL (443) 
Abuse Confidence rating 53%
Found in DNSBL('s)
ASN Details
   AS50113 NTX Technologies s.r.o.
   Russia (RU)
   CIDR 185.40.4.0/23
Log Date: 19/08/2020 11:45:22 AM UTC

Aug 19 07:26:44 webctf kernel: [2192658.414078] [UFW BLOCK] IN=ens3 OUT= MAC=fa:16:3e:1e:56:95:22:15:58:e0:52:53:08:00 SRC=185.40.4.228 DST=137.74.115.118 LEN=40 TOS=0x00 PREC=0x00 TTL=242 ID=1040 DF PROTO=TCP SPT=8 DPT=9899 WINDOW=512 RES=0x00 SYN URGP=0 
Aug 19 07:27:01 webctf kernel: [2192675.457115] [UFW BLOCK] IN=ens3 OUT= MAC=fa:16:3e:1e:56:95:22:15:58:e0:52:53:08:00 SRC=185.40.4.228 DST=137.74.115.118 LEN=40 TOS=0x00 PREC=0x00 TTL=242 ID=1040 DF PROTO=TCP SPT=3 DPT=8015 WINDOW=512 RES=0x00 SYN URGP=0 
Aug 19 07:28:05 webctf kernel: [2192739.413120] [UFW BLOCK] IN=ens3 OUT= MAC=fa:16:3e:1e:56:95:22:15:58:e0:52:53:08:00 SRC=185.40.4.228 DST=137.74.115.118 LEN=40 TOS=0x00 PREC=0x00 TTL=242 ID=1040 DF PROTO=TCP SPT=7 DPT=8250 WINDOW=512 RES=0x00 SYN URGP=0 
Aug 19 07:28:14 webctf kernel: [2192748.304717] [UFW BLOCK] IN=ens3 OUT= MAC=fa:16:3e:1e:56:95:22:15:58:e0:52:53:08:00 SRC=185.40.4.228 DST=137.74.115.118 LEN=40 TOS=0x00 PREC=0x00 TTL=242 ID=1040 DF PROTO=TCP SPT=15 DPT=8102 WIN
...

Port scan on 10 port(s): 8079 8226 8227 8228 8229 9011 9012 9013 9014 9912

[2020-08-11 12:36:01] NOTICE[1185] chan_sip.c: Registration from '"1532"' failed for '185.40.4.206:5902' - Wrong password
[2020-08-11 12:36:01] SECURITY[1203] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-08-11T12:36:01.089-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="1532",SessionID="0x7f10c43e3a48",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.40.4.206/5902",Challenge="3b09517a",ReceivedChallenge="3b09517a",ReceivedHash="009674402867bf8e12213fa46021a4b0"
[2020-08-11 12:36:15] NOTICE[1185] chan_sip.c: Registration from '"1512"' failed for '185.40.4.206:9819' - Wrong password
[2020-08-11 12:36:15] SECURITY[1203] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-08-11T12:36:15.098-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="1512",SessionID="0x7f10c4270ff8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.40.
...

[2020-06-16 15:21:21] NOTICE[1273][C-000017ba] chan_sip.c: Call from '' (185.40.4.53:58544) to extension '++801146313116013' rejected because extension not found in context 'public'.
[2020-06-16 15:21:21] SECURITY[1288] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-06-16T15:21:21.019-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="++801146313116013",SessionID="0x7f31c018ea98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.40.4.53/58544",ACLName="no_extension_match"
[2020-06-16 15:23:20] NOTICE[1273][C-000017be] chan_sip.c: Call from '' (185.40.4.53:53352) to extension '++901146313116013' rejected because extension not found in context 'public'.
[2020-06-16 15:23:20] SECURITY[1288] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-06-16T15:23:20.610-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="++901146313116013",SessionID="0x7f31c02f97a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UD
...

[2020-06-14 16:08:59] NOTICE[1273][C-00000ffd] chan_sip.c: Call from '' (185.40.4.53:65289) to extension '800+441235619322' rejected because extension not found in context 'public'.
[2020-06-14 16:08:59] SECURITY[1288] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-06-14T16:08:59.414-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="800+441235619322",SessionID="0x7f31c02f97a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.40.4.53/65289",ACLName="no_extension_match"
[2020-06-14 16:10:00] NOTICE[1273][C-00000ffe] chan_sip.c: Call from '' (185.40.4.53:53613) to extension '800++441235619322' rejected because extension not found in context 'public'.
[2020-06-14 16:10:00] SECURITY[1288] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-06-14T16:10:00.751-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="800++441235619322",SessionID="0x7f31c02f97a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/
...

[2020-06-14 06:45:36] NOTICE[1273][C-00000dfe] chan_sip.c: Call from '' (185.40.4.53:56337) to extension '0*11441235619322' rejected because extension not found in context 'public'.
[2020-06-14 06:45:36] SECURITY[1288] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-06-14T06:45:36.682-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="0*11441235619322",SessionID="0x7f31c018ea98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.40.4.53/56337",ACLName="no_extension_match"
[2020-06-14 06:46:41] NOTICE[1273][C-00000dff] chan_sip.c: Call from '' (185.40.4.53:64601) to extension '0*8011441235619322' rejected because extension not found in context 'public'.
...

Jun  3 17:06:36 [host] kernel: [7825185.722207] [U
Jun  3 17:08:26 [host] kernel: [7825295.450001] [U
Jun  3 17:10:15 [host] kernel: [7825404.591808] [U
Jun  3 17:39:33 [host] kernel: [7827161.909439] [U
Jun  3 17:45:53 [host] kernel: [7827542.158092] [U
Jun  3 17:52:57 [host] kernel: [7827965.896732] [U

[H1.VM8] Blocked by UFW

Port Scanner (UDP Port 1730)

firewall-block, port(s): 86/tcp, 87/tcp, 90/tcp, 95/tcp, 97/tcp, 98/tcp, 1082/tcp, 1085/tcp, 1101/tcp, 8080/tcp, 8230/tcp, 9096/tcp, 65000/tcp

firewall-block, port(s): 82/tcp, 89/tcp, 97/tcp, 500/tcp

[2020-04-22 01:16:47] NOTICE[1170][C-00003639] chan_sip.c: Call from '' (185.40.4.53:63322) to extension '011442038074728' rejected because extension not found in context 'public'.
[2020-04-22 01:16:47] SECURITY[1184] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-04-22T01:16:47.748-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="011442038074728",SessionID="0x7f6c0817f3c8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.40.4.53/63322",ACLName="no_extension_match"
[2020-04-22 01:19:14] NOTICE[1170][C-0000363c] chan_sip.c: Call from '' (185.40.4.53:65195) to extension '9011442038074728' rejected because extension not found in context 'public'.
[2020-04-22 01:19:14] SECURITY[1184] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-04-22T01:19:14.737-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="9011442038074728",SessionID="0x7f6c0825cda8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.
...

SSH Bruteforce attempt

$f2bV_matches

Automatic report - XMLRPC Attack

2020-04-24T16:42:17.955055sd-86998 sshd[26449]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.151  user=root
2020-04-24T16:42:19.793072sd-86998 sshd[26449]: Failed password for root from 222.186.175.151 port 15436 ssh2
2020-04-24T16:42:23.923425sd-86998 sshd[26449]: Failed password for root from 222.186.175.151 port 15436 ssh2
2020-04-24T16:42:17.955055sd-86998 sshd[26449]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.151  user=root
2020-04-24T16:42:19.793072sd-86998 sshd[26449]: Failed password for root from 222.186.175.151 port 15436 ssh2
2020-04-24T16:42:23.923425sd-86998 sshd[26449]: Failed password for root from 222.186.175.151 port 15436 ssh2
2020-04-24T16:42:17.955055sd-86998 sshd[26449]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.151  user=root
2020-04-24T16:42:19.793072sd-86998 sshd[26449]: Failed password for roo
...

Apr 24 16:58:31 debian-2gb-nbg1-2 kernel: \[9999254.989858\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=54.38.193.111 DST=195.201.40.59 LEN=52 TOS=0x02 PREC=0x00 TTL=113 ID=16355 DF PROTO=TCP SPT=49662 DPT=60 WINDOW=8192 RES=0x00 CWR ECE SYN URGP=0

SpamScore above: 10.0

Unauthorized connection attempt detected from IP address 122.6.249.253 to port 23 [T]

Apr 24 16:00:40 combo sshd[22086]: Failed password for root from 222.186.173.226 port 15100 ssh2
Apr 24 16:00:44 combo sshd[22086]: Failed password for root from 222.186.173.226 port 15100 ssh2
Apr 24 16:00:47 combo sshd[22086]: Failed password for root from 222.186.173.226 port 15100 ssh2
...

RU_MFIST-MNT_<177>1587730015 [1:2010935:3] ET SCAN Suspicious inbound to MSSQL port 1433 [Classification: Potentially Bad Traffic] [Priority: 2]:  {TCP} 188.18.139.95:64580

Unauthorised connection attempt detected at AUO NODE 1. System is sshd. Protected by AUO Stack Web Application Firewall (WAF)

Apr 24 14:07:23 debian-2gb-nbg1-2 kernel: \[9988987.892603\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=178.88.63.155 DST=195.201.40.59 LEN=52 TOS=0x00 PREC=0x20 TTL=115 ID=6292 DF PROTO=TCP SPT=60617 DPT=21 WINDOW=8192 RES=0x00 SYN URGP=0

Apr 24 14:04:48 minden010 sshd[11087]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.227.104
Apr 24 14:04:50 minden010 sshd[11087]: Failed password for invalid user lb from 106.13.227.104 port 50372 ssh2
Apr 24 14:06:58 minden010 sshd[11358]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.227.104
...

Unauthorized connection attempt from IP address 191.55.22.96 on Port 445(SMB)

Lines containing failures of 92.118.205.144
Apr 22 23:13:49 mailserver sshd[31826]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=92.118.205.144  user=r.r
Apr 22 23:13:52 mailserver sshd[31826]: Failed password for r.r from 92.118.205.144 port 34634 ssh2
Apr 22 23:13:52 mailserver sshd[31826]: Received disconnect from 92.118.205.144 port 34634:11: Bye Bye [preauth]
Apr 22 23:13:52 mailserver sshd[31826]: Disconnected from authenticating user r.r 92.118.205.144 port 34634 [preauth]
Apr 22 23:24:53 mailserver sshd[682]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=92.118.205.144  user=r.r
Apr 22 23:24:55 mailserver sshd[682]: Failed password for r.r from 92.118.205.144 port 36426 ssh2
Apr 22 23:24:55 mailserver sshd[682]: Received disconnect from 92.118.205.144 port 36426:11: Bye Bye [preauth]
Apr 22 23:24:55 mailserver sshd[682]: Disconnected from authenticating user r.r 92.118.205.144 po........
------------------------------

Brute force attempt

Apr 24 13:58:57 server sshd[8523]: Failed password for root from 91.121.145.227 port 47902 ssh2
Apr 24 14:02:56 server sshd[9938]: Failed password for invalid user sampath from 91.121.145.227 port 39242 ssh2
Apr 24 14:06:53 server sshd[11244]: Failed password for invalid user graylog from 91.121.145.227 port 58464 ssh2