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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.
In the old post from when the update was released a Heise article is linked, that contains indicators of compromise, and in turn links to Kevin Beaumont for the details of his analysis:
https://lemmy.zip/post/54712916
https://www.heise.de/en/news/Notepad-updater-installed-malware-11109726.html
https://doublepulsar.com/small-numbers-of-notepad-users-reporting-security-woes-371d7a3fd2d9