A malicious attachment delivered through a phishing email points to the involvement of North Korea-linked threat actors in Humanity Protocol’s recent hack, according to blockchain security company Quantstamp.The decentralized identity company said a compromised employee’s laptop enabled attackers to steal $36 million in Humanity (H) tokens on Monday. The malicious attachment was disguised as a token lockup schedule update from South Korean cryptocurrency exchange Bithumb. It installed malware that gave attackers full remote access to…