Must be a valid IPv4 or IPv6 ip address, e.g. 127.0.0.1 or 2001:DB8:0:0:8:800:200C:417A
Basic Info

City: unknown

Region: unknown

Country: Japan

Internet Service Provider: Microsoft Corporation

Hostname: unknown

Organization: unknown

Usage Type: Data Center/Web Hosting/Transit

Comments:
Type Details Datetime
attack
Oct 22 05:43:08 ip-172-31-1-72 sshd[26620]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=40.74.115.36  user=r.r
Oct 22 05:43:10 ip-172-31-1-72 sshd[26620]: Failed password for r.r from 40.74.115.36 port 46260 ssh2
Oct 22 05:47:36 ip-172-31-1-72 sshd[26682]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=40.74.115.36  user=r.r
Oct 22 05:47:38 ip-172-31-1-72 sshd[26682]: Failed password for r.r from 40.74.115.36 port 59474 ssh2
Oct 22 05:52:22 ip-172-31-1-72 sshd[26755]: Invalid user simone from 40.74.115.36
Oct 22 05:52:22 ip-172-31-1-72 sshd[26755]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=40.74.115.36

........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=40.74.115.36
2019-10-22 14:07:30
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 40.74.115.36
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 40804
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;40.74.115.36.			IN	A

;; AUTHORITY SECTION:
.			500	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019102200 1800 900 604800 86400

;; Query time: 95 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Tue Oct 22 14:07:27 CST 2019
;; MSG SIZE  rcvd: 116
Host info
Host 36.115.74.40.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 36.115.74.40.in-addr.arpa: NXDOMAIN
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