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\

f2b trigger Multiple SASL failures

2019-08-2810:22:39dovecot_plainauthenticatorfailedfor\([141.98.80.73]\)[141.98.80.73]:14298:535Incorrectauthenticationdata\(set_id=tintas@helcom.net\)2019-08-2810:22:47dovecot_plainauthenticatorfailedfor\([141.98.80.73]\)[141.98.80.73]:47814:535Incorrectauthenticationdata\(set_id=tintas\)2019-08-2810:39:18dovecot_plainauthenticatorfailedfor\([141.98.80.73]\)[141.98.80.73]:59234:535Incorrectauthenticationdata\(set_id=bruno.rosenberger@inerta.eu\)2019-08-2810:39:26dovecot_plainauthenticatorfailedfor\([141.98.80.73]\)[141.98.80.73]:1558:535Incorrectauthenticationdata\(set_id=bruno.rosenberger\)2019-08-2810:48:49dovecot_plainauthenticatorfailedfor\([141.98.80.73]\)[141.98.80.73]:26996:535Incorrectauthenticationdata\(set_id=info@benesserequino.com\)2019-08-2810:48:57dovecot_plainauthenticatorfailedfor\([141.98.80.73]\)[141.98.80.73]:9514:535Incorrectauthenticationdata\(set_id=info\)2019-08-2811:09:18dovecot_plainauthenticatorfailedfor\([141.98.80.73]\)[141.98.80.73]:58270:535Incorrectauthenticationdata\(set_id=sec

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

SASL PLAIN auth failed: ruser=...

Oct  6 16:16:11 relay postfix/smtpd\[16426\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  6 16:16:32 relay postfix/smtpd\[16426\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  6 16:20:33 relay postfix/smtpd\[26253\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  6 16:20:51 relay postfix/smtpd\[18786\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  6 16:24:26 relay postfix/smtpd\[26136\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Oct 11 07:06:29 www2 sshd\[12335\]: Failed password for root from 49.51.46.69 port 45776 ssh2Oct 11 07:10:24 www2 sshd\[12892\]: Failed password for root from 49.51.46.69 port 57726 ssh2Oct 11 07:14:10 www2 sshd\[13135\]: Failed password for root from 49.51.46.69 port 41396 ssh2
...

Oct 11 05:31:55 apollo sshd\[23763\]: Failed password for root from 180.96.69.215 port 46874 ssh2Oct 11 05:47:26 apollo sshd\[23818\]: Failed password for root from 180.96.69.215 port 36940 ssh2Oct 11 05:51:56 apollo sshd\[23837\]: Failed password for root from 180.96.69.215 port 46358 ssh2
...

Tried sshing with brute force.

Oct 10 23:51:23 xentho sshd[10411]: Invalid user astr from 54.36.189.105 port 38912
Oct 10 23:51:23 xentho sshd[10411]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.36.189.105
Oct 10 23:51:23 xentho sshd[10411]: Invalid user astr from 54.36.189.105 port 38912
Oct 10 23:51:25 xentho sshd[10411]: Failed password for invalid user astr from 54.36.189.105 port 38912 ssh2
Oct 10 23:51:29 xentho sshd[10413]: Invalid user azure from 54.36.189.105 port 40338
Oct 10 23:51:29 xentho sshd[10413]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.36.189.105
Oct 10 23:51:29 xentho sshd[10413]: Invalid user azure from 54.36.189.105 port 40338
Oct 10 23:51:30 xentho sshd[10413]: Failed password for invalid user azure from 54.36.189.105 port 40338 ssh2
Oct 10 23:51:29 xentho sshd[10413]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.36.189.105
Oct 10 23:51:29 xentho sshd[1
...

Wordpress Bruteforce

2019-10-11T05:55:55.663828abusebot.cloudsearch.cf sshd\[32520\]: Invalid user Debian@1234 from 137.74.47.22 port 37796

Unauthorised access (Oct 11) SRC=27.192.229.184 LEN=40 TTL=49 ID=35350 TCP DPT=8080 WINDOW=25399 SYN 
Unauthorised access (Oct 10) SRC=27.192.229.184 LEN=40 TTL=49 ID=24506 TCP DPT=8080 WINDOW=6223 SYN 
Unauthorised access (Oct 10) SRC=27.192.229.184 LEN=40 TTL=49 ID=43981 TCP DPT=8080 WINDOW=59696 SYN 
Unauthorised access (Oct  9) SRC=27.192.229.184 LEN=40 TTL=49 ID=31460 TCP DPT=8080 WINDOW=6223 SYN

eintrachtkultkellerfulda.de 45.113.122.172 \[11/Oct/2019:05:51:35 +0200\] "POST /xmlrpc.php HTTP/1.1" 200 408 "-" "Mozilla/5.0 \(Windows\; U\; Windows NT 5.1\; en-US\; rv:1.9.0.1\) Gecko/2008070208 Firefox/3.0.1"
eintrachtkultkellerfulda.de 45.113.122.172 \[11/Oct/2019:05:51:36 +0200\] "POST /xmlrpc.php HTTP/1.1" 200 408 "-" "Mozilla/5.0 \(Windows\; U\; Windows NT 5.1\; en-US\; rv:1.9.0.1\) Gecko/2008070208 Firefox/3.0.1"

Oct 11 12:13:24 gw1 sshd[24190]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.196.83.30
Oct 11 12:13:26 gw1 sshd[24190]: Failed password for invalid user export from 119.196.83.30 port 54400 ssh2
...

\[2019-10-11 04:40:06\] NOTICE\[1887\] chan_sip.c: Registration from '\' failed for '81.171.85.146:58904' - Wrong password
\[2019-10-11 04:40:06\] SECURITY\[1898\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-11T04:40:06.345-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="2342",SessionID="0x7fc3acb748a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.85.146/58904",Challenge="69757512",ReceivedChallenge="69757512",ReceivedHash="198679de9ab5c5df9cba23cb27697481"
\[2019-10-11 04:40:35\] NOTICE\[1887\] chan_sip.c: Registration from '\' failed for '81.171.85.146:52961' - Wrong password
\[2019-10-11 04:40:35\] SECURITY\[1898\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-11T04:40:35.879-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="8726",SessionID="0x7fc3acc3d768",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/81.171.85

Lines containing failures of 106.12.27.46
Oct  6 22:30:38 shared02 sshd[3376]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.27.46  user=r.r
Oct  6 22:30:40 shared02 sshd[3376]: Failed password for r.r from 106.12.27.46 port 49314 ssh2
Oct  6 22:30:40 shared02 sshd[3376]: Received disconnect from 106.12.27.46 port 49314:11: Bye Bye [preauth]
Oct  6 22:30:40 shared02 sshd[3376]: Disconnected from authenticating user r.r 106.12.27.46 port 49314 [preauth]
Oct  6 22:57:14 shared02 sshd[12775]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.27.46  user=r.r
Oct  6 22:57:16 shared02 sshd[12775]: Failed password for r.r from 106.12.27.46 port 34606 ssh2
Oct  6 22:57:16 shared02 sshd[12775]: Received disconnect from 106.12.27.46 port 34606:11: Bye Bye [preauth]
Oct  6 22:57:16 shared02 sshd[12775]: Disconnected from authenticating user r.r 106.12.27.46 port 34606 [preauth]
Oct  6 23:0........
------------------------------

Bot ignores robot.txt restrictions

Brute force attempt

Oct  6 06:32:30 shadeyouvpn sshd[15778]: Address 80.211.158.23 maps to jbwastats.pl, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
Oct  6 06:32:30 shadeyouvpn sshd[15778]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=80.211.158.23  user=r.r
Oct  6 06:32:32 shadeyouvpn sshd[15778]: Failed password for r.r from 80.211.158.23 port 40772 ssh2
Oct  6 06:32:32 shadeyouvpn sshd[15778]: Received disconnect from 80.211.158.23: 11: Bye Bye [preauth]
Oct  6 06:36:29 shadeyouvpn sshd[19024]: Address 80.211.158.23 maps to jbwastats.pl, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
Oct  6 06:36:29 shadeyouvpn sshd[19024]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=80.211.158.23  user=r.r
Oct  6 06:36:31 shadeyouv
.... truncated .... 

Oct  6 06:32:30 shadeyouvpn sshd[15778]: Address 80.211.158.23 maps to jbwastats.pl, but this does not map back to ........
-------------------------------

2019-10-11T08:05:17.825029abusebot-3.cloudsearch.cf sshd\[31435\]: Invalid user Centos1@3 from 142.93.109.129 port 51220