Initial access techniques used by Iran-based threat actors
Sophos, Friday, March 13th, 2026
Analysis of attacks originating from Iran-linked threat groups reveals a preference for certain techniques
Iranian‑linked threat groups often use a core set of initial access methods. The threat actors favor cost-effective, repeatable intrusion techniques that involve social engineering, quickly exploiting public vulnerabilities, and using compromised credentials to infiltrate systems. To build strong defense measures, organizations should reinforce identity, email, and perimeter security by implementing phishing-resistant multi-factor authentication, promptly patching exposed systems, monitoring for unusual authentication and remote management usage, and minimizing risk from weak or default credentials in both IT and OT environments.