\[2019-09-27 01:05:34\] SECURITY\[2006\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-27T01:05:34.813-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="5793901148957156004",SessionID="0x7f1e1c11c748",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.141/54037",ACLName="no_extension_match"
\[2019-09-27 01:06:55\] SECURITY\[2006\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-27T01:06:55.197-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="5376101148767414003",SessionID="0x7f1e1c0a98e8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.141/53268",ACLName="no_extension_match"
\[2019-09-27 01:07:03\] SECURITY\[2006\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-27T01:07:03.301-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="4950401148343508005",SessionID="0x7f1e1c11c748",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.141/53319",

\[2019-09-26 21:55:49\] SECURITY\[2006\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-26T21:55:49.229-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="5784101148957156004",SessionID="0x7f1e1c1e96b8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.141/62276",ACLName="no_extension_match"
\[2019-09-26 21:56:28\] SECURITY\[2006\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-26T21:56:28.880-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="5364701148767414003",SessionID="0x7f1e1c0a98e8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.141/55174",ACLName="no_extension_match"
\[2019-09-26 21:57:05\] SECURITY\[2006\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-26T21:57:05.327-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="4940501148343508005",SessionID="0x7f1e1c09a878",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.141/60656",

unauthorized connection attempt

[2020-06-28 17:24:51] NOTICE[1273] chan_sip.c: Registration from '"2908" ' failed for '77.247.110.2:5064' - Wrong password
[2020-06-28 17:24:51] SECURITY[1288] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-06-28T17:24:51.624-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="2908",SessionID="0x7f31c02f97a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.2/5064",Challenge="37caaa52",ReceivedChallenge="37caaa52",ReceivedHash="e87c29e6c1817591943b89639a4a0676"
[2020-06-28 17:29:09] NOTICE[1273] chan_sip.c: Registration from '"2908" ' failed for '77.247.110.2:5064' - Wrong password
[2020-06-28 17:29:09] SECURITY[1288] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-06-28T17:29:09.196-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="2908",SessionID="0x7f31c02adcc8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.24
...

scans once in preceeding hours on the ports (in chronological order) 7020 resulting in total of 1 scans from 77.247.110.0/24 block.

Multiport scan 12 ports : 5064 5065 5066 5073 5074 5085 5086 5087 5088 5097 5098 5099

TCP Port Scanning

firewall-block, port(s): 20707/udp

Port scan denied

Found User-Agent associated with security scanner
Request Missing a Host Header

Port scanning [3 denied]

Port scanning [3 denied]

trying to access non-authorized port

05/24/2020-08:16:45.569374 77.247.110.58 Protocol: 17 ET SCAN Sipvicious Scan

firewall-block, port(s): 5060/udp

[2020-05-11 12:56:03] NOTICE[1157] chan_sip.c: Registration from '2113 ' failed for '77.247.110.25:39139' - Wrong password
[2020-05-11 12:56:03] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-11T12:56:03.094-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="2113",SessionID="0x7f5f107b3898",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.25/39139",Challenge="6e9e74f7",ReceivedChallenge="6e9e74f7",ReceivedHash="7719d35949f68e6bbd867e678d222a11"
[2020-05-11 13:02:11] NOTICE[1157] chan_sip.c: Registration from '1333333 ' failed for '77.247.110.25:45567' - Wrong password
[2020-05-11 13:02:11] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-11T13:02:11.143-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="1333333",SessionID="0x7f5f106f5588",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV
...

05/10/2020-17:42:49.443850 77.247.110.58 Protocol: 17 ET SCAN Sipvicious Scan

Feb 24 01:27:09 motanud sshd\[9073\]: Invalid user yarn from 222.233.76.250 port 37908
Feb 24 01:27:09 motanud sshd\[9073\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.233.76.250
Feb 24 01:27:12 motanud sshd\[9073\]: Failed password for invalid user yarn from 222.233.76.250 port 37908 ssh2

Aug 11 01:08:47 OPSO sshd\[19300\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.71.72.189  user=root
Aug 11 01:08:47 OPSO sshd\[19301\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.71.72.189  user=admin
Aug 11 01:08:47 OPSO sshd\[19302\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.71.72.189  user=root
Aug 11 01:08:49 OPSO sshd\[19300\]: Failed password for root from 167.71.72.189 port 46164 ssh2
Aug 11 01:08:49 OPSO sshd\[19301\]: Failed password for admin from 167.71.72.189 port 46166 ssh2
Aug 11 01:08:49 OPSO sshd\[19302\]: Failed password for root from 167.71.72.189 port 46162 ssh2

SSH-BruteForce

Aug 10 19:21:07 TORMINT sshd\[32565\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.101.63.40  user=root
Aug 10 19:21:10 TORMINT sshd\[32565\]: Failed password for root from 46.101.63.40 port 41340 ssh2
Aug 10 19:27:58 TORMINT sshd\[480\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.101.63.40  user=root
...

Aug 11 02:23:07 www sshd\[151153\]: Invalid user www from 195.119.114.32
Aug 11 02:23:07 www sshd\[151153\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=195.119.114.32
Aug 11 02:23:09 www sshd\[151153\]: Failed password for invalid user www from 195.119.114.32 port 36997 ssh2
...

Aug 11 01:31:53 srv-4 sshd\[19810\]: Invalid user admin from 94.50.244.87
Aug 11 01:31:53 srv-4 sshd\[19810\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=94.50.244.87
Aug 11 01:31:55 srv-4 sshd\[19810\]: Failed password for invalid user admin from 94.50.244.87 port 39194 ssh2
...

Aug 10 23:28:03 unicornsoft sshd\[15478\]: Invalid user test from 200.11.150.238
Aug 10 23:28:03 unicornsoft sshd\[15478\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=200.11.150.238
Aug 10 23:28:06 unicornsoft sshd\[15478\]: Failed password for invalid user test from 200.11.150.238 port 38717 ssh2

Blocked for port scanning.
Time: Sat Aug 10. 18:29:46 2019 +0200
IP: 104.236.137.72 (US/United States/-)

Sample of block hits:
Aug 10 18:29:12 vserv kernel: [820757.028987] Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC= SRC=104.236.137.72 DST=[removed] LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36144 DF PROTO=TCP SPT=40326 DPT=8443 WINDOW=29200 RES=0x00 SYN URGP=0
Aug 10 18:29:13 vserv kernel: [820758.026355] Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC= SRC=104.236.137.72 DST=[removed] LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36145 DF PROTO=TCP SPT=40326 DPT=8443 WINDOW=29200 RES=0x00 SYN URGP=0
Aug 10 18:29:15 vserv kernel: [820760.030387] Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC= SRC=104.236.137.72 DST=[removed] LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36146 DF PROTO=TCP SPT=40326 DPT=8443 WINDOW=29200 RES=0x00 SYN URGP=0
Aug 10 18:29:19 vserv kernel: [820764.034365] Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC= SRC=104.236.137.72 DST=[removed] LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36147 DF PROTO=TCP SPT=40326 ....

Aug 11 00:31:59 * sshd[17997]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=188.131.154.248
Aug 11 00:32:01 * sshd[17997]: Failed password for invalid user ros from 188.131.154.248 port 53034 ssh2

May  4 04:21:47 motanud sshd\[24119\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.81.23.44  user=root
May  4 04:21:49 motanud sshd\[24119\]: Failed password for root from 222.81.23.44 port 53125 ssh2
May  4 04:21:51 motanud sshd\[24121\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.81.23.44  user=root
May  4 04:21:53 motanud sshd\[24121\]: Failed password for root from 222.81.23.44 port 51475 ssh2
May  4 04:21:55 motanud sshd\[24127\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.81.23.44  user=root
May  4 04:21:57 motanud sshd\[24127\]: Failed password for root from 222.81.23.44 port 56653 ssh2
May  4 04:22:00 motanud sshd\[24129\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.81.23.44  user=root
May  4 04:22:02 motanud sshd\[24129\]: Failed password for root from 222.81.23.44 port 53018 ssh2

Dec 24 10:54:17 motanud sshd\[8506\]: Invalid user ivo from 37.195.105.57 port 51440
Dec 24 10:54:17 motanud sshd\[8506\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.195.105.57
Dec 24 10:54:19 motanud sshd\[8506\]: Failed password for invalid user ivo from 37.195.105.57 port 51440 ssh2

Aug 10 18:33:45 aat-srv002 sshd[21695]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=210.212.237.67
Aug 10 18:33:47 aat-srv002 sshd[21695]: Failed password for invalid user netstat from 210.212.237.67 port 33610 ssh2
Aug 10 18:39:12 aat-srv002 sshd[21833]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=210.212.237.67
Aug 10 18:39:14 aat-srv002 sshd[21833]: Failed password for invalid user ogrish from 210.212.237.67 port 56740 ssh2
...

Aug 11 00:32:24 MK-Soft-Root2 sshd\[4525\]: Invalid user squirrelmail from 182.61.179.75 port 17084
Aug 11 00:32:24 MK-Soft-Root2 sshd\[4525\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.61.179.75
Aug 11 00:32:26 MK-Soft-Root2 sshd\[4525\]: Failed password for invalid user squirrelmail from 182.61.179.75 port 17084 ssh2
...

Jan 12 07:20:58 motanud sshd\[5463\]: Invalid user titan from 222.92.37.85 port 18850
Jan 12 07:20:58 motanud sshd\[5463\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.92.37.85
Jan 12 07:21:00 motanud sshd\[5463\]: Failed password for invalid user titan from 222.92.37.85 port 18850 ssh2

Automatic report - Port Scan Attack