EDR blocked four attempts. The fifth landed. May 5, 2026 · Patrick Duggan, DugganUSA LLC DigiCert — one of the largest commercial certificate authorities on earth — got phished through their own customer support chat. The vector was a Windows screensaver file in a ZIP, disguised as a customer screenshot. CrowdStrike + endpoint defense blocked four delivery attempts. Number five got through. The attacker spent ten days inside before anyone noticed. They walked out with the abi