Sep 10 02:48:45 h2177944 kernel: \[953060.592563\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=185.40.4.93 DST=85.214.117.9 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=50460 DF PROTO=TCP SPT=1007 DPT=8037 WINDOW=512 RES=0x00 SYN URGP=0 
Sep 10 02:50:02 h2177944 kernel: \[953137.776015\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=185.40.4.93 DST=85.214.117.9 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=50460 DF PROTO=TCP SPT=1011 DPT=7895 WINDOW=512 RES=0x00 SYN URGP=0 
Sep 10 02:54:48 h2177944 kernel: \[953423.539256\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=185.40.4.93 DST=85.214.117.9 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=50460 DF PROTO=TCP SPT=1010 DPT=5003 WINDOW=512 RES=0x00 SYN URGP=0 
Sep 10 02:58:20 h2177944 kernel: \[953635.615839\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=185.40.4.93 DST=85.214.117.9 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=50460 DF PROTO=TCP SPT=1019 DPT=8167 WINDOW=512 RES=0x00 SYN URGP=0 
Sep 10 03:23:20 h2177944 kernel: \[955135.404180\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=185.40.4.93 DST=85.214.117.9 LEN=40 TOS

Port scan on 24 port(s): 92 93 94 900 1234 6066 7070 7078 8000 8045 8070 8099 8100 8159 8160 8175 8190 8191 8192 8193 8524 8995 30000 56001

Port scan on 3 port(s): 8528 8585 8904

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

SASL Brute Force

Jan 10 13:56:07 grey postfix/smtpd\[17264\]: NOQUEUE: reject: RCPT from unknown\[41.159.145.144\]: 554 5.7.1 Service unavailable\; Client host \[41.159.145.144\] blocked using truncate.gbudb.net\; http://www.gbudb.com/truncate/ \[41.159.145.144\]\; from=\ to=\ proto=ESMTP helo=\<\[41.159.145.144\]\>
...

SASL broute force

SSH Brute Force

Jan 10 04:14:16 sachi sshd\[21235\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.4.129  user=root
Jan 10 04:14:18 sachi sshd\[21235\]: Failed password for root from 68.183.4.129 port 60084 ssh2
Jan 10 04:16:16 sachi sshd\[21424\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.4.129  user=root
Jan 10 04:16:18 sachi sshd\[21424\]: Failed password for root from 68.183.4.129 port 50872 ssh2
Jan 10 04:18:13 sachi sshd\[21576\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.4.129  user=root

SASL PLAIN auth failed: ruser=...

unauthorized connection attempt

Jan 10 18:44:21 srv206 sshd[3987]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.148  user=root
Jan 10 18:44:22 srv206 sshd[3987]: Failed password for root from 222.186.175.148 port 51046 ssh2
...

Jan 10 22:39:02 gw1 sshd[24554]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=128.199.166.224
Jan 10 22:39:04 gw1 sshd[24554]: Failed password for invalid user sheepss from 128.199.166.224 port 37494 ssh2
...

Jan 10 17:28:31 124388 sshd[15229]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=146.0.209.72
Jan 10 17:28:31 124388 sshd[15229]: Invalid user jmurphy from 146.0.209.72 port 47894
Jan 10 17:28:32 124388 sshd[15229]: Failed password for invalid user jmurphy from 146.0.209.72 port 47894 ssh2
Jan 10 17:31:42 124388 sshd[15249]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=146.0.209.72  user=root
Jan 10 17:31:44 124388 sshd[15249]: Failed password for root from 146.0.209.72 port 47212 ssh2

Fail2Ban - SMTP Bruteforce Attempt

Jan  4 20:25:40 bacchus kernel: [2719790.711945] [UFW BLOCK] IN=eth0 OUT= MAC=00:50:56:3e:fb:d8:28:99:3a:4d:30:af:08:00 SRC=58.225.75.147 DST=144.91.113.11 LEN=40 TOS=0x00 PREC=0x00 TTL=243 ID=13449 PROTO=TCP SPT=32767 DPT=8545 WINDOW=1024 RES=0x00 SYN URGP=0 
Jan  5 01:33:48 bacchus kernel: [2738279.391843] [UFW BLOCK] IN=eth0 OUT= MAC=00:50:56:3e:fb:d8:28:99:3a:4d:30:af:08:00 SRC=58.225.75.147 DST=144.91.113.11 LEN=40 TOS=0x00 PREC=0x00 TTL=243 ID=13449 PROTO=TCP SPT=32767 DPT=8545 WINDOW=1024 RES=0x00 SYN URGP=0 
Jan  5 11:09:56 bacchus kernel: [2772847.371752] [UFW BLOCK] IN=eth0 OUT= MAC=00:50:56:3e:fb:d8:28:99:3a:4d:30:af:08:00 SRC=58.225.75.147 DST=144.91.113.11 LEN=40 TOS=0x00 PREC=0x00 TTL=243 ID=13449 PROTO=TCP SPT=32767 DPT=8545 WINDOW=1024 RES=0x00 SYN URGP=0 
...

"SSH brute force auth login attempt."

ICMP MH Probe, Scan /Distributed -

SSH Bruteforce attempt