Apr 19 06:38:50 web01.agentur-b-2.de postfix/smtpd[82653]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 19 06:38:50 web01.agentur-b-2.de postfix/smtpd[81971]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 19 06:38:50 web01.agentur-b-2.de postfix/smtpd[82653]: lost connection after AUTH from unknown[141.98.80.30]
Apr 19 06:38:50 web01.agentur-b-2.de postfix/smtpd[81971]: lost connection after AUTH from unknown[141.98.80.30]
Apr 19 06:38:54 web01.agentur-b-2.de postfix/smtpd[82653]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 19 06:38:54 web01.agentur-b-2.de postfix/smtpd[81971]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

Apr 18 10:41:02 mail.srvfarm.net postfix/smtpd[3972655]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 18 10:41:02 mail.srvfarm.net postfix/smtpd[3972655]: lost connection after AUTH from unknown[141.98.80.30]
Apr 18 10:41:07 mail.srvfarm.net postfix/smtpd[3967890]: lost connection after CONNECT from unknown[141.98.80.30]
Apr 18 10:41:11 mail.srvfarm.net postfix/smtpd[3972655]: lost connection after CONNECT from unknown[141.98.80.30]
Apr 18 10:41:15 mail.srvfarm.net postfix/smtpd[3974489]: lost connection after AUTH from unknown[141.98.80.30]

Apr 17 13:51:25 mail postfix/smtpd\[29099\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Apr 17 13:51:25 mail postfix/smtpd\[29711\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Apr 17 13:51:43 mail postfix/smtpd\[29715\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Apr 17 13:51:43 mail postfix/smtpd\[29714\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

Apr 17 09:32:46 mail postfix/smtpd\[23504\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Apr 17 09:32:46 mail postfix/smtpd\[23503\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Apr 17 09:33:03 mail postfix/smtpd\[23505\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Apr 17 09:33:03 mail postfix/smtpd\[23502\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

Apr 16 21:43:38 mail postfix/smtpd\[8398\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Apr 16 21:43:38 mail postfix/smtpd\[8508\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Apr 16 21:43:56 mail postfix/smtpd\[8508\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Apr 16 21:43:56 mail postfix/smtpd\[8398\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

2020-04-15T23:07:03.352250l03.customhost.org.uk postfix/smtps/smtpd[1000]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: authentication failure
2020-04-15T23:07:07.002893l03.customhost.org.uk postfix/smtps/smtpd[1000]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: authentication failure
2020-04-15T23:08:37.877017l03.customhost.org.uk postfix/smtps/smtpd[1000]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: authentication failure
2020-04-15T23:08:42.874667l03.customhost.org.uk postfix/smtps/smtpd[1000]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: authentication failure
...

Apr 15 09:12:29 mail.srvfarm.net postfix/smtpd[2077768]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 15 09:12:29 mail.srvfarm.net postfix/smtpd[2077768]: lost connection after AUTH from unknown[141.98.80.30]
Apr 15 09:12:34 mail.srvfarm.net postfix/smtpd[2065982]: lost connection after CONNECT from unknown[141.98.80.30]
Apr 15 09:12:38 mail.srvfarm.net postfix/smtpd[2064212]: lost connection after AUTH from unknown[141.98.80.30]
Apr 15 09:12:43 mail.srvfarm.net postfix/smtpd[2079033]: lost connection after CONNECT from unknown[141.98.80.30]

2020-04-14 08:25:10 dovecot_login authenticator failed for \(\[141.98.80.30\]\) \[141.98.80.30\]: 535 Incorrect authentication data \(set_id=inarcassaonline@opso.it\)
2020-04-14 08:25:17 dovecot_login authenticator failed for \(\[141.98.80.30\]\) \[141.98.80.30\]: 535 Incorrect authentication data
2020-04-14 08:25:26 dovecot_login authenticator failed for \(\[141.98.80.30\]\) \[141.98.80.30\]: 535 Incorrect authentication data
2020-04-14 08:25:31 dovecot_login authenticator failed for \(\[141.98.80.30\]\) \[141.98.80.30\]: 535 Incorrect authentication data
2020-04-14 08:25:42 dovecot_login authenticator failed for \(\[141.98.80.30\]\) \[141.98.80.30\]: 535 Incorrect authentication data

Apr 13 20:14:21 web01.agentur-b-2.de postfix/smtpd[607378]: warning: unknown[141.98.80.30]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 13 20:14:21 web01.agentur-b-2.de postfix/smtpd[607378]: lost connection after AUTH from unknown[141.98.80.30]
Apr 13 20:14:26 web01.agentur-b-2.de postfix/smtpd[606157]: lost connection after AUTH from unknown[141.98.80.30]
Apr 13 20:14:31 web01.agentur-b-2.de postfix/smtpd[607378]: lost connection after AUTH from unknown[141.98.80.30]
Apr 13 20:14:36 web01.agentur-b-2.de postfix/smtpd[606406]: lost connection after AUTH from unknown[141.98.80.30]

Apr 13 00:57:49 srv01 postfix/smtpd\[16753\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 13 00:58:07 srv01 postfix/smtpd\[16753\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 13 00:58:33 srv01 postfix/smtpd\[16753\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 13 00:58:33 srv01 postfix/smtpd\[17823\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 13 00:58:37 srv01 postfix/smtpd\[17823\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 13 00:58:37 srv01 postfix/smtpd\[16753\]: warning: unknown\[141.98.80.30\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Unauthorized connection attempt
IP: 141.98.80.30
Ports affected
    Simple Mail Transfer (25) 
    Message Submission (587) 
Abuse Confidence rating 100%
Found in DNSBL('s)
ASN Details
   AS43350 NForce Entertainment B.V.
   Panama (PA)
   CIDR 141.98.80.0/24
Log Date: 11/04/2020 11:27:44 PM UTC

smtp auth brute force

Scan ports and try log to VPN by default device admin account/password

Oct 13 20:36:42 mail postfix/smtpd\[2755\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 21:07:45 mail postfix/smtpd\[3739\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 21:08:05 mail postfix/smtpd\[3743\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 21:08:21 mail postfix/smtpd\[3743\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

Oct 13 12:10:32 mail postfix/smtpd\[17486\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 12:10:52 mail postfix/smtpd\[17603\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 12:11:11 mail postfix/smtpd\[17486\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 12:42:04 mail postfix/smtpd\[18268\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

2020-10-11 20:00:28 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data \(set_id=ben@benjaminhauck.com\)
2020-10-11 20:00:36 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data
2020-10-11 20:00:45 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data
2020-10-11 20:00:51 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data
2020-10-11 20:01:03 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data
...

Fail2Ban Ban Triggered

Brute Force attack - banned by Fail2Ban

[H1.VM1] Blocked by UFW

port scan hacking

Tried to scan TCP Port but the Antivirus refused. More than 20 times within a few months.

\x03 400 0 "-" "-"

Found on   Binary Defense     / proto=6  .  srcport=65528  .  dstport=53 DNS  .     (757)

Exim brute force attack (multiple auth failures).

UTC 10/08/2020 18:12:24 - 83 - Security Services - Alert - 141.98.80.22, 65534, X1 - xxx.xxx.xxx.xxx, 8651, X1 - tcp - TCP scanned port list, 8691, 8611, 8671, 8601, 8661, 8641, 8681, 8631, 8621, 8651 - Probable port scan detected

Oct  8 17:35:05 relay postfix/smtpd\[8860\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  8 17:35:26 relay postfix/smtpd\[4144\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  8 17:40:26 relay postfix/smtpd\[5072\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  8 17:40:45 relay postfix/smtpd\[4145\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  8 17:46:12 relay postfix/smtpd\[8861\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

scans 10 times in preceeding hours on the ports (in chronological order) 8601 8611 8621 8631 8641 8651 8661 8671 8681 8691

tcp port scan

Scan or attack attempt on email service.

Honeypot attack, port: 5555, PTR: 42-98-238-169.static.netvigator.com.

Sep  4 18:52:11 mellenthin postfix/smtpd[29582]: NOQUEUE: reject: RCPT from unknown[190.175.7.89]: 554 5.7.1 Service unavailable; Client host [190.175.7.89] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/190.175.7.89; from= to= proto=ESMTP helo=<190-175-7-89.speedy.com.ar>

[2020-09-04 17:59:14] NOTICE[1194] chan_sip.c: Registration from '' failed for '185.147.212.8:54279' - Wrong password
[2020-09-04 17:59:14] SECURITY[1233] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-09-04T17:59:14.237-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="580",SessionID="0x7f2ddc1178e8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.147.212.8/54279",Challenge="168fe2fc",ReceivedChallenge="168fe2fc",ReceivedHash="721a27db59548469f58b2635e91cba8e"
[2020-09-04 18:02:15] NOTICE[1194] chan_sip.c: Registration from '' failed for '185.147.212.8:61062' - Wrong password
[2020-09-04 18:02:15] SECURITY[1233] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-09-04T18:02:15.537-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="1480",SessionID="0x7f2ddc00cc78",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.147.212.8/6
...

Sep  4 23:54:23 relay postfix/smtpd\[12755\]: warning: unknown\[45.142.120.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep  4 23:55:08 relay postfix/smtpd\[12755\]: warning: unknown\[45.142.120.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep  4 23:55:44 relay postfix/smtpd\[15375\]: warning: unknown\[45.142.120.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep  4 23:56:24 relay postfix/smtpd\[15380\]: warning: unknown\[45.142.120.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep  4 23:57:10 relay postfix/smtpd\[12754\]: warning: unknown\[45.142.120.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Sep  4 18:51:39 mellenthin postfix/smtpd[32584]: NOQUEUE: reject: RCPT from unknown[190.237.28.36]: 554 5.7.1 Service unavailable; Client host [190.237.28.36] blocked using zen.spamhaus.org; https://www.spamhaus.org/sbl/query/SBLCSS / https://www.spamhaus.org/query/ip/190.237.28.36; from= to= proto=ESMTP helo=<[190.237.28.36]>

Honeypot attack, port: 445, PTR: static-ptr.ehost.vn.

Sep  5 00:17:49 vps1 sshd[23177]: Failed none for invalid user root from 218.92.0.248 port 57413 ssh2
Sep  5 00:17:49 vps1 sshd[23177]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.248  user=root
Sep  5 00:17:51 vps1 sshd[23177]: Failed password for invalid user root from 218.92.0.248 port 57413 ssh2
Sep  5 00:17:54 vps1 sshd[23177]: Failed password for invalid user root from 218.92.0.248 port 57413 ssh2
Sep  5 00:17:58 vps1 sshd[23177]: Failed password for invalid user root from 218.92.0.248 port 57413 ssh2
Sep  5 00:18:01 vps1 sshd[23177]: Failed password for invalid user root from 218.92.0.248 port 57413 ssh2
Sep  5 00:18:05 vps1 sshd[23177]: Failed password for invalid user root from 218.92.0.248 port 57413 ssh2
Sep  5 00:18:05 vps1 sshd[23177]: error: maximum authentication attempts exceeded for invalid user root from 218.92.0.248 port 57413 ssh2 [preauth]
...

SmallBizIT.US 9 packets to tcp(3399,3404,5000,5001,5188,5589,6689,20001,50002)

3-9-2020 18:45:55	Unauthorized connection attempt (Brute-Force).
3-9-2020 18:45:55	Connection from IP address: 47.52.112.219 on port: 587


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=47.52.112.219

SSH Invalid Login

Sep  4 12:52:54 ny01 sshd[7121]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.203.184.19
Sep  4 12:52:56 ny01 sshd[7121]: Failed password for invalid user postgres from 159.203.184.19 port 35094 ssh2
Sep  4 12:56:31 ny01 sshd[7933]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.203.184.19

php WP PHPmyadamin ABUSE blocked for 12h

Sep  4 18:12:01 NPSTNNYC01T sshd[27295]: Failed password for root from 222.186.180.8 port 58158 ssh2
Sep  4 18:12:13 NPSTNNYC01T sshd[27295]: error: maximum authentication attempts exceeded for root from 222.186.180.8 port 58158 ssh2 [preauth]
Sep  4 18:12:18 NPSTNNYC01T sshd[27328]: Failed password for root from 222.186.180.8 port 8012 ssh2
...

Sep  5 00:03:46 rotator sshd\[22899\]: Invalid user atul from 172.81.241.92Sep  5 00:03:47 rotator sshd\[22899\]: Failed password for invalid user atul from 172.81.241.92 port 41168 ssh2Sep  5 00:07:07 rotator sshd\[23659\]: Invalid user vinci from 172.81.241.92Sep  5 00:07:09 rotator sshd\[23659\]: Failed password for invalid user vinci from 172.81.241.92 port 40804 ssh2Sep  5 00:10:32 rotator sshd\[24431\]: Invalid user sysadmin from 172.81.241.92Sep  5 00:10:34 rotator sshd\[24431\]: Failed password for invalid user sysadmin from 172.81.241.92 port 40234 ssh2
...