TL;DR: These are forks by unknown people containing malware. I see no indication in the linked thread of even a single successful compromise actually occurring, or malicious code making it into legitimate upstream projects.
This is interesting. If you go to that user's profile, and look at the "contributions", there are none in July / August. Yet the commit is from two days ago.
https://github.com/promonlogicalis/asn1/commit/7bdca06d0edf8...