“In April 1982, the FBI recruited Martynov as an agent. He stayed in place and began feeding Soviet secrets to his FBI handlers.”
So his grandfather worked for the US.
Coristine has a brief but colorful history that includes being fired from Path Networks, a cybersecurity company, for giving company documents to a competitor. He apparently palled around with a criminal hacking group called The Com and, according to a Telegram account associated with him, had solicited hacking services online. In 2021, he founded a company called Tesla.Sexy LLC that, according to Wired, “controls dozens of web domains, including at least two Russian-registered domains. One of those domains, which is still active, offers a service called Helfie, which is an AI bot for Discord servers targeting the Russian market.”
Quoting from hackernews comments