Sep 16 23:09:53 web1 postfix/smtpd[22894]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed: authentication failure
...

Sep 14 18:32:50 mail postfix/smtpd\[6688\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 14 19:04:08 mail postfix/smtpd\[7435\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 14 19:04:15 mail postfix/smtpd\[7435\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 14 19:23:03 mail postfix/smtpd\[7899\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \

Sep 14 00:21:15 s1 postfix/submission/smtpd\[21563\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:21:22 s1 postfix/submission/smtpd\[21563\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:21:37 s1 postfix/submission/smtpd\[21563\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:21:44 s1 postfix/submission/smtpd\[22479\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:21:45 s1 postfix/submission/smtpd\[21563\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:22:06 s1 postfix/submission/smtpd\[22479\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:22:11 s1 postfix/submission/smtpd\[22475\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:22:31 s1 postfix/submission/smtpd\[22475\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:22:31 s1 postfix/submission/smtpd\[215

Sep 12 13:04:28 ncomp postfix/smtpd[3726]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed:
Sep 12 13:04:39 ncomp postfix/smtpd[3726]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed:
Sep 12 13:40:40 ncomp postfix/smtpd[4354]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed:

Sep 11 21:30:21 mail postfix/smtpd\[17518\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 11 21:30:31 mail postfix/smtpd\[18142\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 11 22:01:30 mail postfix/smtpd\[17395\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 11 22:01:39 mail postfix/smtpd\[13803\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \

Sep 11 01:28:23 vmanager6029 postfix/smtpd\[32289\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 11 01:28:42 vmanager6029 postfix/smtpd\[32289\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:

Sep 10 03:14:10 mail postfix/smtpd\[18325\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 10 03:14:23 mail postfix/smtpd\[18325\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 10 04:02:10 mail postfix/smtpd\[18988\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 10 04:02:18 mail postfix/smtpd\[20587\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \

2019-09-09 13:26:00 fixed_plain authenticator failed for \(\[141.98.80.80\]\) \[141.98.80.80\]: 535 Incorrect authentication data \(set_id=chris@thepuddles.net.nz\)
2019-09-09 13:26:05 fixed_plain authenticator failed for \(\[141.98.80.80\]\) \[141.98.80.80\]: 535 Incorrect authentication data \(set_id=chris\)
2019-09-09 14:48:15 fixed_plain authenticator failed for \(\[141.98.80.80\]\) \[141.98.80.80\]: 535 Incorrect authentication data \(set_id=hobo@thepuddles.net.nz\)
...

2019-09-0812:14:28dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:52962:535Incorrectauthenticationdata\(set_id=alice@tpgs.ch\)2019-09-0812:14:36dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:33408:535Incorrectauthenticationdata\(set_id=alice\)2019-09-0812:27:37dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:8480:535Incorrectauthenticationdata\(set_id=giorgio@modesti.it\)2019-09-0812:27:45dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:43308:535Incorrectauthenticationdata\(set_id=giorgio\)2019-09-0812:43:26dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:21596:535Incorrectauthenticationdata\(set_id=aurelia@helcom.net\)2019-09-0812:43:34dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:37078:535Incorrectauthenticationdata\(set_id=aurelia\)2019-09-0813:08:12dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:27706:535Incorrectauthenticationdata\(set_id=dimlailildimlailil@panyluz.c

Sep  7 20:06:15 georgia postfix/smtpd[5751]: connect from unknown[141.98.80.80]
Sep  7 20:06:17 georgia postfix/smtpd[5751]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed: authentication failure
Sep  7 20:06:17 georgia postfix/smtpd[5751]: lost connection after AUTH from unknown[141.98.80.80]
Sep  7 20:06:17 georgia postfix/smtpd[5751]: disconnect from unknown[141.98.80.80] ehlo=1 auth=0/1 commands=1/2
Sep  7 20:06:17 georgia postfix/smtpd[6532]: connect from unknown[141.98.80.80]
Sep  7 20:06:18 georgia postfix/smtpd[6532]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed: authentication failure
Sep  7 20:06:19 georgia postfix/smtpd[6532]: lost connection after AUTH from unknown[141.98.80.80]
Sep  7 20:06:19 georgia postfix/smtpd[6532]: disconnect from unknown[141.98.80.80] ehlo=1 auth=0/1 commands=1/2
Sep  7 20:07:31 georgia postfix/smtpd[5751]: connect from unknown[141.98.80.80]
Sep  7 20:07:32 georgia postfix/smtpd[5751]: warning: ........
-------------------------------

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

$f2bV_matches

Too many connections or unauthorized access detected from Arctic banned ip

php WP PHPmyadamin ABUSE blocked for 12h

Dec  8 15:50:54 server1 postfix/smtpd\[23583\]: warning: unknown\[185.36.81.141\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Dec  8 16:03:19 server1 postfix/smtpd\[24114\]: warning: unknown\[185.36.81.141\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Dec  8 16:40:01 server1 postfix/smtpd\[25804\]: warning: unknown\[185.36.81.141\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

Dec  8 17:24:09 mail sshd\[11524\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.157  user=root
Dec  8 17:24:11 mail sshd\[11524\]: Failed password for root from 218.92.0.157 port 19239 ssh2
Dec  8 17:24:29 mail sshd\[11541\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.157  user=root
...

Dec  8 16:47:35 meumeu sshd[2590]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=170.239.101.4 
Dec  8 16:47:37 meumeu sshd[2590]: Failed password for invalid user colman from 170.239.101.4 port 27372 ssh2
Dec  8 16:54:05 meumeu sshd[3709]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=170.239.101.4 
...

185.53.88.78 was recorded 18 times by 17 hosts attempting to connect to the following ports: 5060. Incident counter (4h, 24h, all-time): 18, 44, 1768

Dec  8 16:30:45 icinga sshd[15269]: Failed password for root from 49.235.38.225 port 54908 ssh2
...

Dec  8 11:28:05 TORMINT sshd\[9984\]: Invalid user consani from 107.173.145.168
Dec  8 11:28:05 TORMINT sshd\[9984\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=107.173.145.168
Dec  8 11:28:07 TORMINT sshd\[9984\]: Failed password for invalid user consani from 107.173.145.168 port 49588 ssh2
...

2019-12-08T14:56:02.717372beta postfix/smtpd[9264]: NOQUEUE: reject: RCPT from 19010727163.ip68.static.mediacommerce.com.co[190.107.27.163]: 554 5.7.1 Service unavailable; Client host [190.107.27.163] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/190.107.27.163 / https://www.spamhaus.org/sbl/query/SBLCSS; from= to= proto=ESMTP helo=<19010727163.ip68.static.mediacommerce.com.co>
...

2019-12-08T16:58:12.410760  sshd[13000]: Invalid user paris5 from 78.231.133.117 port 48400
2019-12-08T16:58:12.425894  sshd[13000]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=78.231.133.117
2019-12-08T16:58:12.410760  sshd[13000]: Invalid user paris5 from 78.231.133.117 port 48400
2019-12-08T16:58:15.223134  sshd[13000]: Failed password for invalid user paris5 from 78.231.133.117 port 48400 ssh2
2019-12-08T17:07:05.778174  sshd[13166]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=78.231.133.117  user=root
2019-12-08T17:07:07.411624  sshd[13166]: Failed password for root from 78.231.133.117 port 53676 ssh2
...

$f2bV_matches

2019-12-08T17:00:35.875363  sshd[13077]: Invalid user omgserv from 36.89.247.26 port 60631
2019-12-08T17:00:35.889717  sshd[13077]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=36.89.247.26
2019-12-08T17:00:35.875363  sshd[13077]: Invalid user omgserv from 36.89.247.26 port 60631
2019-12-08T17:00:37.984477  sshd[13077]: Failed password for invalid user omgserv from 36.89.247.26 port 60631 ssh2
2019-12-08T17:08:05.997369  sshd[13180]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=36.89.247.26  user=root
2019-12-08T17:08:08.202360  sshd[13180]: Failed password for root from 36.89.247.26 port 37097 ssh2
...

SSH bruteforce

MultiHost/MultiPort Probe, Scan, Hack -