Escalation in the Shadows: Iranian APT Seedworm Deploys ‘Dindoor’ Backdoor in New Cyberoffensive The Threat Hunter Team reports a surge in cyberespionage by Iranian-linked APT Seedworm targeting multiple U.S. organizations and companies—often those with ties to Israel—since early February 2026. Researchers uncovered a previously undocumented backdoor named Dindoor across several victims, while hacktivist group Handala has used partial data leaks to amplify attacks, elevating...

Iranian-linked APT Seedworm intensifies cyberespionage targeting U.S. banks and defense-aerospace firms using a new backdoor called Dindoor. Hacktivist group Handala amplifies attacks with data leaks. #Seedworm #Dindoor #UnitedStates