Today we released Mbin v1.8.0! It has been already 1 month since we released v1.7.4.
This is the v1.8.0 release of Mbin and it is a feature packed one like always ;).
It brings an extensive bookmarking system, signup request support, signup notifications, extended markdown rendering, custom notification settings to set magazines, users, threads and microblogs to default, loud or muted, setting a default sort for the front page and comment lists, a new image delete command for admins and documentation changes.
You also still might want to double check if you are using the latest Nginx configs (v1.8.0 has now additional regex improvements).
I want to thank all the contributors! We can't do it without you all!
Mbin takes a lot of time to develop, maintain and improve. Created as a successor of /kbin, but still going strong ever since. If you would like to support this work or cover the server costs, please consider donating. Thank you.
Melroy
EDIT: There is a more detailed post here.
Thanks for the detailed answer. I imagined it was due to something like that. Sounds like a "homebuilt" DDOS platform if its coming from any compromised device, so it could be any number of BS reasons, just simply testing out their botnet, or stressing the server to probe for specific vulnerabilities.