https://www.bleepingcomputer.com/news/security/microsoft-hackers-target-defense-firms-with-new-falsefont-malware/

Microsoft says the APT33 Iranian cyber-espionage group is using recently discovered FalseFont backdoor malware to attack defense contractors worldwide.

"Microsoft has observed the Iranian nation-state actor Peach Sandstorm attempting to deliver a newly developed backdoor named FalseFont to individuals working for organizations in the Defense Industrial Base (DIB) sector," the company said.