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Notepad++ Hijacked by State-Sponsored Hackers
(notepad-plus-plus.org)
This is a most excellent place for technology news and articles.
I'm not sure what you mean. The article states there were remote hands on keyboard noticed in multiple companies. That's how the vulnerability was discovered.
I mean IOCs that you can scan for in an environment to see if a machine has been compromised using this vulnerability. Something that tells you if you need to do additional remediation on a machine or just update notepad++ and move on.
Edit: Found some! This is the type of info I was thinking of when I used IOCs
https://securelist.com/notepad-supply-chain-attack/118708/