212.83.184.117 - - [11/Aug/2020:10:13:06 +0200] "www.ruhnke.cloud" "POST /wp-login.php HTTP/1.1" 200 4983 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0" "-" 0.791
...

212.83.184.117 - - [09/Aug/2020:08:39:28 +0100] "POST /wp-login.php HTTP/1.1" 200 1792 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
212.83.184.117 - - [09/Aug/2020:08:39:28 +0100] "POST /wp-login.php HTTP/1.1" 200 1768 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
212.83.184.117 - - [09/Aug/2020:08:39:28 +0100] "POST /xmlrpc.php HTTP/1.1" 403 219 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
...

/wp-login.php

WordPress brute force

\[2019-08-18 21:55:38\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2647' - Wrong password
\[2019-08-18 21:55:38\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-18T21:55:38.844-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="19393",SessionID="0x7ff4d07e79a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.83.184.217/62689",Challenge="32f3c1df",ReceivedChallenge="32f3c1df",ReceivedHash="4f18966beb3d0927e29487269dfc7bab"
\[2019-08-18 21:56:26\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2660' - Wrong password
\[2019-08-18 21:56:26\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-18T21:56:26.900-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="33515",SessionID="0x7ff4d07e79a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.

\[2019-08-18 10:33:33\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2721' - Wrong password
\[2019-08-18 10:33:33\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-18T10:33:33.706-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="95613",SessionID="0x7ff4d0348688",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.83.184.217/54631",Challenge="14ae6dbd",ReceivedChallenge="14ae6dbd",ReceivedHash="3b4ce4a304f1a503e6f2b5ccd4c05671"
\[2019-08-18 10:34:21\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2629' - Wrong password
\[2019-08-18 10:34:21\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-18T10:34:21.916-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="24455",SessionID="0x7ff4d02d8f48",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.

\[2019-08-17 22:05:18\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2774' - Wrong password
\[2019-08-17 22:05:18\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-17T22:05:18.835-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="91721",SessionID="0x7ff4d07952f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.83.184.217/53042",Challenge="548b83ef",ReceivedChallenge="548b83ef",ReceivedHash="3dca85baca74855235d7b96bd2e6e3c9"
\[2019-08-17 22:06:07\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2638' - Wrong password
\[2019-08-17 22:06:07\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-17T22:06:07.867-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="63078",SessionID="0x7ff4d07952f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.

\[2019-08-17 09:05:43\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2783' - Wrong password
\[2019-08-17 09:05:43\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-17T09:05:43.458-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="99546",SessionID="0x7ff4d07952f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.83.184.217/54326",Challenge="3d63766f",ReceivedChallenge="3d63766f",ReceivedHash="008d23f361e02e5762a7b2b305f6b97c"
\[2019-08-17 09:06:32\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2731' - Wrong password
\[2019-08-17 09:06:32\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-17T09:06:32.686-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="59577",SessionID="0x7ff4d07952f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.

\[2019-08-16 21:08:56\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2617' - Wrong password
\[2019-08-16 21:08:56\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-16T21:08:56.046-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="21936",SessionID="0x7ff4d004fe18",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.83.184.217/49248",Challenge="257090fe",ReceivedChallenge="257090fe",ReceivedHash="efb6cc8876c735e089852b8e0ef3c12f"
\[2019-08-16 21:09:44\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2600' - Wrong password
\[2019-08-16 21:09:44\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-16T21:09:44.965-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="70607",SessionID="0x7ff4d0348688",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.

\[2019-08-15 13:03:00\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2747' - Wrong password
\[2019-08-15 13:03:00\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-15T13:03:00.153-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="94585",SessionID="0x7ff4d0155c88",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.83.184.217/50658",Challenge="7ce77d6d",ReceivedChallenge="7ce77d6d",ReceivedHash="7c57bc3e2a2dacfba3e9174de606eaef"
\[2019-08-15 13:03:48\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2699' - Wrong password
\[2019-08-15 13:03:48\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-15T13:03:48.632-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="98176",SessionID="0x7ff4d07952f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.

\[2019-08-14 22:09:54\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2749' - Wrong password
\[2019-08-14 22:09:54\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-14T22:09:54.891-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="17872",SessionID="0x7ff4d07e79a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.83.184.217/63424",Challenge="7a0e11e6",ReceivedChallenge="7a0e11e6",ReceivedHash="806e9e8b3b2fe2a66fc464308eff7eb1"
\[2019-08-14 22:10:44\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2791' - Wrong password
\[2019-08-14 22:10:44\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-14T22:10:44.546-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="17757",SessionID="0x7ff4d07e79a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.

\[2019-08-14 08:12:49\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2678' - Wrong password
\[2019-08-14 08:12:49\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-14T08:12:49.234-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="73546",SessionID="0x7ff4d0348688",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.83.184.217/56567",Challenge="5a04c174",ReceivedChallenge="5a04c174",ReceivedHash="4cbe7c3ddfb2b7fbfa15d800bbdd7a4b"
\[2019-08-14 08:13:36\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2680' - Wrong password
\[2019-08-14 08:13:36\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-14T08:13:36.097-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="80663",SessionID="0x7ff4d07e79a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.

\[2019-08-13 21:20:11\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2722' - Wrong password
\[2019-08-13 21:20:11\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-13T21:20:11.330-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="28362",SessionID="0x7ff4d0c799b8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.83.184.217/65402",Challenge="6595c0b1",ReceivedChallenge="6595c0b1",ReceivedHash="20cfb2d1a903091d0ce94a42e11ecaa1"
\[2019-08-13 21:20:59\] NOTICE\[2288\] chan_sip.c: Registration from '\' failed for '212.83.184.217:2625' - Wrong password
\[2019-08-13 21:20:59\] SECURITY\[2326\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-08-13T21:20:59.689-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="31111",SessionID="0x7ff4d0404308",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/212.

Mar 18 18:46:18 gw1 sshd[29113]: Failed password for root from 195.9.225.238 port 59694 ssh2
...

Port probing on unauthorized port 5555

Mar 18 13:40:21 blackbee postfix/smtpd\[25001\]: warning: unknown\[193.56.28.188\]: SASL LOGIN authentication failed: authentication failure
Mar 18 13:40:21 blackbee postfix/smtpd\[25001\]: warning: unknown\[193.56.28.188\]: SASL LOGIN authentication failed: authentication failure
Mar 18 13:40:24 blackbee postfix/smtpd\[25001\]: warning: unknown\[193.56.28.188\]: SASL LOGIN authentication failed: authentication failure
Mar 18 13:40:26 blackbee postfix/smtpd\[25001\]: warning: unknown\[193.56.28.188\]: SASL LOGIN authentication failed: authentication failure
Mar 18 13:40:28 blackbee postfix/smtpd\[25001\]: warning: unknown\[193.56.28.188\]: SASL LOGIN authentication failed: authentication failure
...

Mar 18 14:18:14 h2779839 sshd[11627]: Invalid user compose from 194.150.68.145 port 47110
Mar 18 14:18:14 h2779839 sshd[11627]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.150.68.145
Mar 18 14:18:14 h2779839 sshd[11627]: Invalid user compose from 194.150.68.145 port 47110
Mar 18 14:18:17 h2779839 sshd[11627]: Failed password for invalid user compose from 194.150.68.145 port 47110 ssh2
Mar 18 14:22:40 h2779839 sshd[11700]: Invalid user servers from 194.150.68.145 port 55380
Mar 18 14:22:40 h2779839 sshd[11700]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.150.68.145
Mar 18 14:22:40 h2779839 sshd[11700]: Invalid user servers from 194.150.68.145 port 55380
Mar 18 14:22:42 h2779839 sshd[11700]: Failed password for invalid user servers from 194.150.68.145 port 55380 ssh2
Mar 18 14:26:56 h2779839 sshd[11766]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=19
...

k+ssh-bruteforce

k+ssh-bruteforce

March 18 2020, 13:28:33 [sshd] - Banned from the Cipher Host hosting platform by Fail2ban.

Mar 18 14:40:33 legacy sshd[12388]: Failed password for root from 201.249.88.124 port 52117 ssh2
Mar 18 14:44:33 legacy sshd[12445]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=201.249.88.124
Mar 18 14:44:35 legacy sshd[12445]: Failed password for invalid user james from 201.249.88.124 port 55361 ssh2
...

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Mar 18 09:54:39 plusreed sshd[24453]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.15.158  user=root
Mar 18 09:54:40 plusreed sshd[24453]: Failed password for root from 222.186.15.158 port 57863 ssh2
...

SSH Brute-Forcing (server2)

Unauthorized connection attempt detected from IP address 195.93.142.70 to port 80

Mar 18 06:32:11 mockhub sshd[31243]: Failed password for root from 180.76.160.148 port 50472 ssh2
Mar 18 06:36:38 mockhub sshd[31409]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.76.160.148
...

Brute forcing RDP port 3389

Triggered by Fail2Ban at Ares web server