The Federal Bureau of Investigation (FBI) and the Cybersecurity and Infrastructure Security Agency (CISA) are jointly issuing this public service announcement (PSA) to warn the public about ongoing phishing campaigns by cyber actors associated with the Russian Intelligence Services (RIS) targeting commercial messaging applications (CMAs). RIS actors have compromised individual CMA accounts, but not CMAs' encryption or the applications themselves. The activity targets individuals of high intelligence value, such as current and former U.S. government officials, military personnel, political figures, and journalists.