No, in a word. What do you hear those phrases saying that points you to a specific actor? You should look at Kaspersky's Operation Triangulation and Project Ze

No, in a word. What do you hear those phrases saying that points you to a specific actor? You should look at Kaspersky's Operation Triangulation and Project Zero's In-The-Wild series to understand how researchers are increasingly aggressive toward replaying & capturing these exploit chains. If you want to preserve your exploits & everyone does- you have to implement these checks