Attempted to login using an invalid username

Attempted to login using an invalid username

Attempted to login using an invalid username

Joomla! administrator brute-force

Joomla! administrator brute-force

May 24 23:30:04 takio postfix/smtpd[9965]: lost connection after AUTH from unknown[37.49.230.122]
May 24 23:30:06 takio postfix/smtpd[9965]: lost connection after AUTH from unknown[37.49.230.122]
May 24 23:30:07 takio postfix/smtpd[9965]: lost connection after AUTH from unknown[37.49.230.122]

May  9 22:18:11 web01.agentur-b-2.de postfix/smtpd[285896]: warning: unknown[37.49.230.122]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
May  9 22:18:11 web01.agentur-b-2.de postfix/smtpd[285896]: lost connection after AUTH from unknown[37.49.230.122]
May  9 22:18:17 web01.agentur-b-2.de postfix/smtpd[283299]: warning: unknown[37.49.230.122]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
May  9 22:18:17 web01.agentur-b-2.de postfix/smtpd[283299]: lost connection after AUTH from unknown[37.49.230.122]
May  9 22:18:27 web01.agentur-b-2.de postfix/smtpd[285896]: warning: unknown[37.49.230.122]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

(smtpauth) Failed SMTP AUTH login from 37.49.230.122 (NL/Netherlands/-): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2020-05-09 02:12:52 login authenticator failed for (hUmtHwFubH) [37.49.230.122]: 535 Incorrect authentication data (set_id=ripe@yas-co.com)

(smtpauth) Failed SMTP AUTH login from 37.49.230.122 (NL/Netherlands/-): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2020-04-28 16:39:30 login authenticator failed for (User) [37.49.230.122]: 535 Incorrect authentication data (set_id=ripe@farasunict.com)

Bible

2020-10-13T06:44:21.356144news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
2020-10-13T06:44:25.395781news0 dovecot[21131]: pop3-login: Aborted login (auth failed, 1 attempts in 4 secs): user=, method=PLAIN, rip=37.49.230.238, lip=95.111.246.42, session=
2020-10-13T06:44:28.401407news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
...

2020-10-13T06:44:21.356144news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
2020-10-13T06:44:25.395781news0 dovecot[21131]: pop3-login: Aborted login (auth failed, 1 attempts in 4 secs): user=, method=PLAIN, rip=37.49.230.238, lip=95.111.246.42, session=
2020-10-13T06:44:28.401407news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
...

Dovecot Invalid User Login Attempt.

"AmooT";tag=3533393765393339313363340132313832313335333935

\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.624+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffea08d88",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="096f171f",ReceivedChallenge="096f171f",ReceivedHash="b099bdfad5869da4ae2114a56a2b4299"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.759+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffeab8148",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="233a417c",ReceivedChallenge="233a417c",ReceivedHash="0017581d14759d4b5ad3a404ed924131"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.783+0200",Severity="Error",Service="SIP",EventVersion="2",Accoun
...

\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.624+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffea08d88",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="096f171f",ReceivedChallenge="096f171f",ReceivedHash="b099bdfad5869da4ae2114a56a2b4299"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.759+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffeab8148",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="233a417c",ReceivedChallenge="233a417c",ReceivedHash="0017581d14759d4b5ad3a404ed924131"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.783+0200",Severity="Error",Service="SIP",EventVersion="2",Accoun
...

[N1.H1.VM1] Port Scanner Detected Blocked by UFW

SIP Server BruteForce Attack

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

Hellooo

Hellooo

Sep 28 15:49:19 : SSH login attempts with invalid user

Dec 23 21:28:53 sanyalnet-cloud-vps4 sshd[4474]: Connection from 117.156.67.18 port 22794 on 64.137.160.124 port 22
Dec 23 21:28:56 sanyalnet-cloud-vps4 sshd[4474]: Invalid user appserv from 117.156.67.18
Dec 23 21:28:56 sanyalnet-cloud-vps4 sshd[4474]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=117.156.67.18 
Dec 23 21:28:58 sanyalnet-cloud-vps4 sshd[4474]: Failed password for invalid user appserv from 117.156.67.18 port 22794 ssh2
Dec 23 21:29:00 sanyalnet-cloud-vps4 sshd[4474]: Received disconnect from 117.156.67.18: 11: Bye Bye [preauth]
Dec 23 21:32:31 sanyalnet-cloud-vps4 sshd[4538]: Connection from 117.156.67.18 port 43246 on 64.137.160.124 port 22
Dec 23 21:32:34 sanyalnet-cloud-vps4 sshd[4538]: Invalid user lynna from 117.156.67.18
Dec 23 21:32:34 sanyalnet-cloud-vps4 sshd[4538]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=117.156.67.18 
Dec 23 21:32:36 sanyalnet-cloud-vps4........
-------------------------------

Too many connections or unauthorized access detected from Arctic banned ip

Lines containing failures of 103.54.28.172
Dec 23 09:48:47 zabbix sshd[14724]: Invalid user issue from 103.54.28.172 port 25188
Dec 23 09:48:47 zabbix sshd[14724]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.54.28.172
Dec 23 09:48:48 zabbix sshd[14724]: Failed password for invalid user issue from 103.54.28.172 port 25188 ssh2
Dec 23 09:48:49 zabbix sshd[14724]: Received disconnect from 103.54.28.172 port 25188:11: Bye Bye [preauth]
Dec 23 09:48:49 zabbix sshd[14724]: Disconnected from invalid user issue 103.54.28.172 port 25188 [preauth]
Dec 23 09:59:25 zabbix sshd[16139]: Invalid user lepori from 103.54.28.172 port 8046
Dec 23 09:59:25 zabbix sshd[16139]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.54.28.172
Dec 23 09:59:27 zabbix sshd[16139]: Failed password for invalid user lepori from 103.54.28.172 port 8046 ssh2
Dec 23 09:59:28 zabbix sshd[16139]: Received disconnect from........
------------------------------

5x Failed Password

Dec 24 21:14:38 localhost sshd[37054]: Failed password for invalid user operator from 201.149.22.37 port 36034 ssh2
Dec 24 21:38:01 localhost sshd[38372]: Failed password for invalid user admin1 from 201.149.22.37 port 43534 ssh2
Dec 24 21:40:09 localhost sshd[38527]: Failed password for invalid user vcsa from 201.149.22.37 port 37446 ssh2

Dec 24 19:10:39 ws19vmsma01 sshd[237007]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=188.166.228.244
Dec 24 19:10:41 ws19vmsma01 sshd[237007]: Failed password for invalid user lei from 188.166.228.244 port 48056 ssh2
...

Dec 24 22:14:25 localhost sshd\[123057\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.150  user=root
Dec 24 22:14:28 localhost sshd\[123057\]: Failed password for root from 222.186.175.150 port 21458 ssh2
Dec 24 22:14:31 localhost sshd\[123057\]: Failed password for root from 222.186.175.150 port 21458 ssh2
Dec 24 22:14:34 localhost sshd\[123057\]: Failed password for root from 222.186.175.150 port 21458 ssh2
Dec 24 22:14:37 localhost sshd\[123057\]: Failed password for root from 222.186.175.150 port 21458 ssh2
...

Dec 24 22:17:57 dedicated sshd[21412]: Invalid user holter from 129.226.160.122 port 47562

Bitcoin extortion email scam from a virus or trojan infected host

Unauthorised access (Dec 24) SRC=177.185.136.201 LEN=48 TTL=109 ID=27965 DF TCP DPT=445 WINDOW=8192 SYN

Unauthorized connection attempt detected from IP address 184.105.247.194 to port 873

2019-12-24T20:07:48.629834shield sshd\[21856\]: Invalid user dupe from 51.254.201.67 port 36910
2019-12-24T20:07:48.634386shield sshd\[21856\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=67.ip-51-254-201.eu
2019-12-24T20:07:51.163958shield sshd\[21856\]: Failed password for invalid user dupe from 51.254.201.67 port 36910 ssh2
2019-12-24T20:10:26.380969shield sshd\[22373\]: Invalid user guest1234 from 51.254.201.67 port 36076
2019-12-24T20:10:26.385827shield sshd\[22373\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=67.ip-51-254-201.eu

Dec 24 22:52:18 dedicated sshd[26871]: Invalid user brook from 69.172.87.212 port 51610

[Aegis] @ 2019-12-24 19:06:58  0000 -> Attempted Administrator Privilege Gain: ET SCAN LibSSH Based Frequent SSH Connections Likely BruteForce Attack

SSH bruteforce (Triggered fail2ban)