NSA, CISA, and FBI Warn of Potential Foreign Cyber Campaigns Targeting U.S. Infrastructure

The NSA, CISA, FBI, and DoD’s DC3 released a joint Cybersecurity Information Sheet titled "Iranian Cyber Actors May Target Vulnerable U.S. Networks and Entities of Interest." The agencies caution that, despite an ongoing ceasefire, Iranian-affiliated threat actors—including state-sponsored groups and hacktivists—could soon launch disruptive campaigns against U.S. networks, particularly those with out-of-date systems or weak credentials.

Key Risks Highlighted:

Greater exposure to DDoS attacks, ransomware, website defacement, and credential stuffing—especially in sectors like energy, water, transportation, and defense .
Focus on Defense Industrial Base (DIB) organizations tied to Israeli research or defense entities

Recommended Defenses:

Immediately disconnect Operational Technology (OT) and Industrial Control Systems (ICS) from internet access.
Enforce strong, unique passwords, phishing-resistant MFA, and up-to-date patching.
Monitor remote-access logs, apply zero-trust segmentation, and rehearse incident-response—especially for high-value control systems.

While no coordinated Iranian attacks have yet been detected, these warnings reflect significant shifts in campaign tactics and underscore the need for immediate remediation.