2020-10-03 15:59:45 server smtpd[96369]: warning: unknown[176.111.173.23]:53702: SASL LOGIN authentication failed: Invalid authentication mechanism

$f2bV_matches

Rude login attack (11 tries in 1d)

Rude login attack (6 tries in 1d)

Rude login attack (12 tries in 1d)

2020-09-29 13:35:25 auth_plain authenticator failed for (User) [176.111.173.23]: 535 Incorrect authentication data (set_id=system1@lavrinenko.info,)
2020-09-29 13:35:26 auth_plain authenticator failed for (User) [176.111.173.23]: 535 Incorrect authentication data (set_id=system1@lavrinenko.info,)
...

2020-09-29 06:09:15 auth_plain authenticator failed for (User) [176.111.173.23]: 535 Incorrect authentication data (set_id=usuario1@lavrinenko.info,)
2020-09-29 06:09:16 auth_plain authenticator failed for (User) [176.111.173.23]: 535 Incorrect authentication data (set_id=usuario1@lavrinenko.info,)
...

Sep 27 23:30:38 ncomp postfix/smtpd[4757]: warning: unknown[176.111.173.23]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 27 23:30:46 ncomp postfix/smtpd[4757]: warning: unknown[176.111.173.23]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 27 23:30:58 ncomp postfix/smtpd[4757]: warning: unknown[176.111.173.23]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

2020-09-27 14:51:38 auth_plain authenticator failed for (User) [176.111.173.23]: 535 Incorrect authentication data (set_id=oracle1@lavrinenko.info,)
2020-09-27 14:51:39 auth_plain authenticator failed for (User) [176.111.173.23]: 535 Incorrect authentication data (set_id=oracle1@lavrinenko.info,)
...

Sep 27 05:39:14 baraca dovecot: auth-worker(47133): passwd(travel3@united.net.ua,176.111.173.23): unknown user
Sep 27 05:39:20 baraca dovecot: auth-worker(47133): passwd(travel3@united.net.ua,176.111.173.23): unknown user
Sep 27 05:39:30 baraca dovecot: auth-worker(47133): passwd(travel3@united.net.ua,176.111.173.23): unknown user
Sep 27 06:51:02 baraca dovecot: auth-worker(51519): passwd(training3@united.net.ua,176.111.173.23): unknown user
Sep 27 08:03:07 baraca dovecot: auth-worker(55924): passwd(temp3@united.net.ua,176.111.173.23): unknown user
Sep 27 08:03:13 baraca dovecot: auth-worker(55924): passwd(temp3@united.net.ua,176.111.173.23): unknown user
...

Sep 25 01:18:21 baraca dovecot: auth-worker(25145): passwd(account2@united.net.ua,176.111.173.23): unknown user
Sep 25 01:18:27 baraca dovecot: auth-worker(25145): passwd(account2@united.net.ua,176.111.173.23): unknown user
Sep 25 01:18:37 baraca dovecot: auth-worker(25145): passwd(account2@united.net.ua,176.111.173.23): unknown user
Sep 25 02:36:38 baraca dovecot: auth-worker(31276): passwd(access2@united.net.ua,176.111.173.23): unknown user
Sep 25 02:36:44 baraca dovecot: auth-worker(31276): passwd(access2@united.net.ua,176.111.173.23): unknown user
Sep 25 02:36:54 baraca dovecot: auth-worker(31276): passwd(access2@united.net.ua,176.111.173.23): unknown user
...

Oct 12 15:14:14 heicom postfix/smtpd\[344\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: authentication failure
Oct 12 15:26:46 heicom postfix/smtpd\[1923\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: authentication failure
...

Oct 12 06:06:22 mail postfix/smtpd\[22631\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 12 06:43:36 mail postfix/smtpd\[23658\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 12 06:56:04 mail postfix/smtpd\[23981\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 12 07:08:31 mail postfix/smtpd\[24552\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

Oct 11 20:22:31 mail postfix/smtpd\[1997\]: warning: unknown\[176.111.173.12\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 11 20:36:51 mail postfix/smtpd\[2685\]: warning: unknown\[176.111.173.12\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 11 20:44:08 mail postfix/smtpd\[2495\]: warning: unknown\[176.111.173.12\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 11 21:45:57 mail postfix/smtpd\[5371\]: warning: unknown\[176.111.173.12\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

spam (f2b h2)

Oct 10 23:37:52 web01.agentur-b-2.de postfix/smtpd[549438]: warning: unknown[176.111.173.12]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 23:37:52 web01.agentur-b-2.de postfix/smtpd[549438]: lost connection after AUTH from unknown[176.111.173.12]
Oct 10 23:39:01 web01.agentur-b-2.de postfix/smtpd[549172]: warning: unknown[176.111.173.12]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 23:39:01 web01.agentur-b-2.de postfix/smtpd[549172]: lost connection after AUTH from unknown[176.111.173.12]
Oct 10 23:45:12 web01.agentur-b-2.de postfix/smtpd[549438]: warning: unknown[176.111.173.12]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

Oct 10 23:37:52 web01.agentur-b-2.de postfix/smtpd[549438]: warning: unknown[176.111.173.12]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 23:37:52 web01.agentur-b-2.de postfix/smtpd[549438]: lost connection after AUTH from unknown[176.111.173.12]
Oct 10 23:39:01 web01.agentur-b-2.de postfix/smtpd[549172]: warning: unknown[176.111.173.12]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 23:39:01 web01.agentur-b-2.de postfix/smtpd[549172]: lost connection after AUTH from unknown[176.111.173.12]
Oct 10 23:45:12 web01.agentur-b-2.de postfix/smtpd[549438]: warning: unknown[176.111.173.12]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

Oct 10 14:09:52 [snip] postfix/smtpd[1517]: warning: unknown[176.111.173.21]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 14:09:58 [snip] postfix/smtpd[1517]: warning: unknown[176.111.173.21]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 14:10:08 [snip] postfix/smtpd[1517]: warning: unknown[176.111.173.21]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 16:34:24 [snip] postfix/smtpd[5804]: warning: unknown[176.111.173.21]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 16:34:30 [snip] postfix/smtpd[5804]: warning: unknown[176.111.173.21]: SASL LOGIN authentication failed: UGFzc3dvcmQ6[...]

Oct 10 07:51:17 mail postfix/smtpd[26587]: warning: unknown[176.111.173.21]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 07:51:23 mail postfix/smtpd[26587]: warning: unknown[176.111.173.21]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct 10 07:51:33 mail postfix/smtpd[26587]: warning: unknown[176.111.173.21]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

 TCP (SYN) 176.111.173.21:46345 -> port 25, len 44

 TCP (SYN) 176.111.173.21:46345 -> port 25, len 44

 TCP (SYN) 176.111.173.21:46345 -> port 25, len 44

Sep 29 19:49:33 elektron postfix/smtpd\[18755\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 29 20:03:57 elektron postfix/smtpd\[18755\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 29 20:16:50 elektron postfix/smtpd\[18755\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 29 20:29:40 elektron postfix/smtpd\[18755\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 29 20:42:31 elektron postfix/smtpd\[18755\]: warning: unknown\[176.111.173.11\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

Sep 29 11:00:57 ncomp postfix/smtpd[27065]: warning: unknown[176.111.173.11]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 29 11:13:47 ncomp postfix/smtpd[27349]: warning: unknown[176.111.173.11]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 29 11:26:39 ncomp postfix/smtpd[27604]: warning: unknown[176.111.173.11]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

Sep 29 06:06:20 host postfix/smtpd[10412]: warning: unknown[176.111.173.11]: SASL LOGIN authentication failed: authentication failure
Sep 29 06:19:16 host postfix/smtpd[16582]: warning: unknown[176.111.173.11]: SASL LOGIN authentication failed: authentication failure
...

Sep 20 06:15:44 Host-KLAX-C postfix/smtpd[391482]: lost connection after AUTH from unknown[176.111.173.11]
Sep 20 06:29:14 Host-KLAX-C postfix/smtpd[392313]: lost connection after AUTH from unknown[176.111.173.11]
Sep 20 06:41:39 Host-KLAX-C postfix/smtpd[392839]: lost connection after AUTH from unknown[176.111.173.11]
Sep 20 06:54:03 Host-KLAX-C postfix/smtpd[392839]: lost connection after AUTH from unknown[176.111.173.11]
Sep 20 07:06:33 Host-KLAX-C postfix/smtpd[392839]: lost connection after AUTH from unknown[176.111.173.11]
Sep 20 07:18:51 Host-KLAX-C postfix/smtpd[394511]: lost connection after AUTH from unknown[176.111.173.11]
Sep 20 07:31:09 Host-KLAX-C postfix/smtpd[394511]: lost connection after AUTH from unknown[176.111.173.11]
Sep 20 07:43:30 Host-KLAX-C postfix/smtpd[395831]: lost connection after AUTH from unknown[176.111.173.11]
Sep 20 07:55:52 Host-KLAX-C postfix/smtpd[395831]: lost connection after AUTH from unknown[176.111.173.11]
Sep 20 08:08:14 Host-KLAX-C postfix/s
...

MultiHost/MultiPort Probe, Scan, Hack -

Oct 18 07:22:12 MK-Soft-VM5 sshd[1279]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=171.244.0.81 
Oct 18 07:22:14 MK-Soft-VM5 sshd[1279]: Failed password for invalid user 123 from 171.244.0.81 port 35927 ssh2
...

Oct 18 05:38:39 tux-35-217 sshd\[25911\]: Invalid user fuckoff from 51.77.150.217 port 55426
Oct 18 05:38:39 tux-35-217 sshd\[25911\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.77.150.217
Oct 18 05:38:41 tux-35-217 sshd\[25911\]: Failed password for invalid user fuckoff from 51.77.150.217 port 55426 ssh2
Oct 18 05:46:31 tux-35-217 sshd\[25929\]: Invalid user ftpuser from 51.77.150.217 port 41382
Oct 18 05:46:31 tux-35-217 sshd\[25929\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.77.150.217
...

Oct 18 08:09:02 vps647732 sshd[13731]: Failed password for root from 106.12.68.10 port 55318 ssh2
...

\[2019-10-18 05:40:00\] NOTICE\[1887\] chan_sip.c: Registration from '\' failed for '77.243.191.124:49283' - Wrong password
\[2019-10-18 05:40:00\] SECURITY\[1898\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-18T05:40:00.241-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="998",SessionID="0x7fc3acf50058",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.243.191.124/49283",Challenge="05f9f8fe",ReceivedChallenge="05f9f8fe",ReceivedHash="0556bcbb72ad6eceb879f5bf6938c966"
\[2019-10-18 05:40:27\] NOTICE\[1887\] chan_sip.c: Registration from '\' failed for '77.243.191.124:52797' - Wrong password
\[2019-10-18 05:40:27\] SECURITY\[1898\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-10-18T05:40:27.898-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="1791",SessionID="0x7fc3ac8475c8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.243.1

WordPress login Brute force / Web App Attack on client site.

Unauthorized IMAP connection attempt

2019-10-18T06:34:53.486083abusebot-5.cloudsearch.cf sshd\[16306\]: Invalid user ts3bot from 201.6.99.139 port 52081

Oct 18 09:18:35 web8 sshd\[12010\]: Invalid user test1 from 124.156.185.149
Oct 18 09:18:35 web8 sshd\[12010\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=124.156.185.149
Oct 18 09:18:38 web8 sshd\[12010\]: Failed password for invalid user test1 from 124.156.185.149 port 42724 ssh2
Oct 18 09:22:35 web8 sshd\[13832\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=124.156.185.149  user=root
Oct 18 09:22:37 web8 sshd\[13832\]: Failed password for root from 124.156.185.149 port 22754 ssh2

SSH/22 MH Probe, BF, Hack -

Oct 18 11:11:30 sauna sshd[38674]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.15.46.184
Oct 18 11:11:32 sauna sshd[38674]: Failed password for invalid user Admin from 51.15.46.184 port 37572 ssh2
...

Oct 18 06:57:48 meumeu sshd[25167]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.132.187 
Oct 18 06:57:51 meumeu sshd[25167]: Failed password for invalid user administrator from 106.12.132.187 port 38910 ssh2
Oct 18 07:03:53 meumeu sshd[25910]: Failed password for root from 106.12.132.187 port 46756 ssh2
...

Oct 17 18:00:15 web9 sshd\[28982\]: Invalid user ubuntu from 180.101.125.162
Oct 17 18:00:15 web9 sshd\[28982\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.101.125.162
Oct 17 18:00:17 web9 sshd\[28982\]: Failed password for invalid user ubuntu from 180.101.125.162 port 55424 ssh2
Oct 17 18:05:08 web9 sshd\[29745\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.101.125.162  user=root
Oct 17 18:05:09 web9 sshd\[29745\]: Failed password for root from 180.101.125.162 port 37744 ssh2

RDP Bruteforce

Oct 17 08:11:28 lively sshd[27946]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=154.221.20.221  user=r.r
Oct 17 08:11:30 lively sshd[27946]: Failed password for r.r from 154.221.20.221 port 59526 ssh2
Oct 17 08:11:31 lively sshd[27946]: Received disconnect from 154.221.20.221 port 59526:11: Bye Bye [preauth]
Oct 17 08:11:31 lively sshd[27946]: Disconnected from authenticating user r.r 154.221.20.221 port 59526 [preauth]
Oct 17 08:22:52 lively sshd[28220]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=154.221.20.221  user=r.r


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=154.221.20.221