Jul 22 20:37:06 relay postfix/smtpd\[18887\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 20:37:25 relay postfix/smtpd\[19322\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 20:39:25 relay postfix/smtpd\[19450\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 20:39:38 relay postfix/smtpd\[19450\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 20:51:53 relay postfix/smtpd\[19448\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Jul 20 16:24:10 relay postfix/smtpd\[10024\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 16:24:23 relay postfix/smtpd\[10023\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 16:25:15 relay postfix/smtpd\[13957\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 16:25:15 relay postfix/smtpd\[10022\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 16:27:31 relay postfix/smtpd\[10023\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 16:27:31 relay postfix/smtpd\[21844\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Jul 20 06:59:53 srv01 postfix/smtpd\[4140\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 07:00:12 srv01 postfix/smtpd\[13594\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 07:03:09 srv01 postfix/smtpd\[15659\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 07:03:28 srv01 postfix/smtpd\[13594\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 07:03:45 srv01 postfix/smtpd\[15659\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 20 07:03:45 srv01 postfix/smtpd\[7825\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Jul 19 17:03:39 l03 postfix/smtps/smtpd[26969]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: authentication failure
Jul 19 17:03:44 l03 postfix/smtps/smtpd[26969]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: authentication failure
Jul 19 17:09:42 l03 postfix/smtps/smtpd[27261]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: authentication failure
Jul 19 17:09:47 l03 postfix/smtps/smtpd[27261]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: authentication failure
...

Jul 19 11:01:36 srv01 postfix/smtpd\[27559\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 19 11:01:36 srv01 postfix/smtpd\[29404\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 19 11:01:55 srv01 postfix/smtpd\[29404\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 19 11:01:55 srv01 postfix/smtpd\[4036\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 19 11:03:16 srv01 postfix/smtpd\[4034\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Jul 19 06:56:04 l03 postfix/smtps/smtpd[25755]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: authentication failure
Jul 19 06:56:09 l03 postfix/smtps/smtpd[25755]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: authentication failure
Jul 19 07:02:13 l03 postfix/smtps/smtpd[28319]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: authentication failure
Jul 19 07:02:18 l03 postfix/smtps/smtpd[28319]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: authentication failure
...

Jul 18 07:42:39 mail.srvfarm.net postfix/smtpd[2159254]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 18 07:42:39 mail.srvfarm.net postfix/smtpd[2159254]: lost connection after AUTH from unknown[141.98.80.53]
Jul 18 07:42:44 mail.srvfarm.net postfix/smtpd[2161831]: lost connection after AUTH from unknown[141.98.80.53]
Jul 18 07:42:49 mail.srvfarm.net postfix/smtpd[2162713]: lost connection after AUTH from unknown[141.98.80.53]
Jul 18 07:42:53 mail.srvfarm.net postfix/smtpd[2162208]: lost connection after AUTH from unknown[141.98.80.53]

Jul 17 08:02:59 relay postfix/smtpd\[15451\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 17 08:02:59 relay postfix/smtpd\[15450\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 17 08:05:28 relay postfix/smtpd\[15449\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 17 08:05:28 relay postfix/smtpd\[10206\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 17 08:07:54 relay postfix/smtpd\[10206\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 17 08:07:54 relay postfix/smtpd\[15450\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Jul 16 19:31:03 relay postfix/smtpd\[9430\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 16 19:31:03 relay postfix/smtpd\[8413\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 16 19:33:35 relay postfix/smtpd\[8453\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 16 19:33:35 relay postfix/smtpd\[14245\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 16 19:36:17 relay postfix/smtpd\[14245\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 16 19:36:17 relay postfix/smtpd\[8413\]: warning: unknown\[141.98.80.53\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Jul 16 03:00:33 mail.srvfarm.net postfix/smtpd[623944]: warning: unknown[141.98.80.53]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 16 03:00:33 mail.srvfarm.net postfix/smtpd[623944]: lost connection after AUTH from unknown[141.98.80.53]
Jul 16 03:00:38 mail.srvfarm.net postfix/smtpd[624210]: lost connection after AUTH from unknown[141.98.80.53]
Jul 16 03:00:43 mail.srvfarm.net postfix/smtpd[624216]: lost connection after AUTH from unknown[141.98.80.53]
Jul 16 03:00:49 mail.srvfarm.net postfix/smtpd[629743]: lost connection after AUTH from unknown[141.98.80.53]

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

2020-01-09 UTC: 10x - root(10x)

Jan 10 11:33:44 grey postfix/smtpd\[25696\]: NOQUEUE: reject: RCPT from unknown\[41.231.8.188\]: 554 5.7.1 Service unavailable\; Client host \[41.231.8.188\] blocked using bl.spamcop.net\; Blocked - see https://www.spamcop.net/bl.shtml\?41.231.8.188\; from=\ to=\ proto=ESMTP helo=\<\[41.231.8.188\]\>
...

445/tcp 445/tcp 445/tcp
[2019-11-12/2020-01-10]3pkt

Jan 10 11:53:41 sso sshd[17966]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=31.184.194.114
Jan 10 11:53:42 sso sshd[17966]: Failed password for invalid user test from 31.184.194.114 port 52422 ssh2
...

1433/tcp 1433/tcp 1433/tcp...
[2019-11-15/2020-01-10]8pkt,1pt.(tcp)

Jan 10 11:37:26 ns392434 sshd[11692]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.45.65  user=root
Jan 10 11:37:29 ns392434 sshd[11692]: Failed password for root from 51.83.45.65 port 57114 ssh2
Jan 10 11:53:54 ns392434 sshd[12300]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.45.65  user=root
Jan 10 11:53:56 ns392434 sshd[12300]: Failed password for root from 51.83.45.65 port 44150 ssh2
Jan 10 11:56:43 ns392434 sshd[12338]: Invalid user ioz from 51.83.45.65 port 47890
Jan 10 11:56:43 ns392434 sshd[12338]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.45.65
Jan 10 11:56:43 ns392434 sshd[12338]: Invalid user ioz from 51.83.45.65 port 47890
Jan 10 11:56:46 ns392434 sshd[12338]: Failed password for invalid user ioz from 51.83.45.65 port 47890 ssh2
Jan 10 11:59:36 ns392434 sshd[12411]: Invalid user admin from 51.83.45.65 port 51634

Jan 10 07:46:22 grey postfix/smtpd\[16363\]: NOQUEUE: reject: RCPT from unknown\[171.246.116.86\]: 554 5.7.1 Service unavailable\; Client host \[171.246.116.86\] blocked using truncate.gbudb.net\; http://www.gbudb.com/truncate/ \[171.246.116.86\]\; from=\ to=\ proto=ESMTP helo=\<\[171.246.116.86\]\>
...

Jan 10 07:12:44 grey postfix/smtpd\[16706\]: NOQUEUE: reject: RCPT from pc-147-126-215-201.cm.vtr.net\[201.215.126.147\]: 554 5.7.1 Service unavailable\; Client host \[201.215.126.147\] blocked using dul.dnsbl.sorbs.net\; Dynamic IP Addresses See: http://www.sorbs.net/lookup.shtml\?201.215.126.147\; from=\ to=\ proto=ESMTP helo=\
...

37215/tcp 37215/tcp
[2020-01-08/09]2pkt

5555/tcp 5555/tcp
[2019-11-16/2020-01-10]2pkt

1578631728 - 01/10/2020 05:48:48 Host: 1.174.128.136/1.174.128.136 Port: 445 TCP Blocked

2020-01-09 22:43:34 dovecot_login authenticator failed for (iigtb) [36.57.89.94]:64960 I=[192.147.25.65]:25: 535 Incorrect authentication data (set_id=zhangmin@lerctr.org)
2020-01-09 22:43:41 dovecot_login authenticator failed for (ivnwj) [36.57.89.94]:64960 I=[192.147.25.65]:25: 535 Incorrect authentication data (set_id=zhangmin@lerctr.org)
2020-01-09 22:48:50 dovecot_login authenticator failed for (hlrff) [36.57.89.94]:64960 I=[192.147.25.65]:25: 535 Incorrect authentication data
...

2020-01-09T23:35:17.4593101495-001 sshd[17481]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=89.222.181.58
2020-01-09T23:35:17.4552691495-001 sshd[17481]: Invalid user uploader from 89.222.181.58 port 57668
2020-01-09T23:35:20.2011591495-001 sshd[17481]: Failed password for invalid user uploader from 89.222.181.58 port 57668 ssh2
2020-01-10T00:35:51.3335121495-001 sshd[19933]: Invalid user vacacy from 89.222.181.58 port 41100
2020-01-10T00:35:51.3419801495-001 sshd[19933]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=89.222.181.58
2020-01-10T00:35:51.3335121495-001 sshd[19933]: Invalid user vacacy from 89.222.181.58 port 41100
2020-01-10T00:35:52.9671691495-001 sshd[19933]: Failed password for invalid user vacacy from 89.222.181.58 port 41100 ssh2
2020-01-10T00:38:57.6864151495-001 sshd[20045]: Invalid user lloyd from 89.222.181.58 port 40228
2020-01-10T00:38:57.6904861495-001 sshd[20045]: pam_unix(ss
...

Jan 10 03:06:40 askasleikir sshd[243091]: Failed password for invalid user qfw from 189.47.214.28 port 58884 ssh2

1578631744 - 01/10/2020 05:49:04 Host: 113.161.87.108/113.161.87.108 Port: 445 TCP Blocked