https://www.bleepingcomputer.com/news/security/microsoft-discovers-iranian-hacking-campaign-targeting-us-politics/

Microsoft says that a state-sponsored Iranian cyber-espionage group tracked as Phosphorus by the Microsoft Threat Intelligence Center (MSTIC) attempted to get account info on over 2,700 of its customers, attack 241 of them, and compromised four accounts between August and September.

The attacks conducted by the Phosphorus hacking group (aka APT35, Charming Kitten, or Ajax Security Team), tracked by MSTIC since 2013, were observed by Microsoft for over 30 days as they targeted accounts related to U.S. politics, Iranian expats, and journalists.