CISA Exercise Breached Two Critical Infrastructure Organizations, One Had No Detection

CISA, the U.S. federal agency responsible for cybersecurity, recently conducted a red team exercise that successfully broke into two critical infrastructure organizations. According to a report from The Hacker News, one of those two organizations never detected the intrusion at all.

A red team is a group of security professionals who deliberately attack an organization's systems using the same techniques as real hackers, with the goal of finding weaknesses before actual criminals do. Here, the red team operated by CISA managed to compromise two organizations that belong to critical infrastructure sectors. Critical infrastructure covers areas like electricity, water, transportation, hospitals and communications. A successful attack on these types of organizations could affect many people, which is why they are held to stricter security expectations.

The most striking part of the exercise is that one of the two organizations had no idea it had been breached. That detail matters because detection is often what separates a minor security incident from a full-scale disaster. If defenders do not realize an attacker is inside their network, the attacker can keep moving through systems for weeks or even months, quietly stealing credentials, accessing sensitive data and planting malicious software. Many organizations spend heavily on firewalls and antivirus tools, but far fewer invest enough in monitoring, logging and trained staff who can spot unusual activity.

Security experts often point out that every network, no matter how well protected, will eventually be breached. What distinguishes resilient organizations is how quickly they detect and respond to the intrusion. In this case, one organization missed the attack entirely, which suggests it may have lacked the visibility into its own systems needed to notice anomalous behavior. Without that visibility, attackers can operate freely, exfiltrating data or preparing ransomware deployments with little interference.

This lesson applies well beyond government and large enterprises. Website owners and small businesses should look at this outcome as a warning. Cybercriminals frequently target smaller companies, either because they are easier to get into or because they can be used as stepping stones to reach larger partners. A hosting account, a small admin panel or a single inbox can be the starting point for a much bigger attack. The good news is that the same principles that would have helped the two critical infrastructure organizations also work on a smaller scale: use strong authentication, keep every piece of software current, and set up some form of logging and alerting so that strange behavior becomes visible early.

For organizations that do not have a dedicated security team, the idea of monitoring networks around the clock can feel overwhelming. Managed services and external consultants can fill that gap. A security assessment or an ongoing monitoring plan can reveal the same kinds of blind spots that CISA's red team apparently found. The exercise is a reminder that being breached is not the only problem; not knowing about the breach is often the bigger problem. To get help spotting intrusions before they cause major damage, AEU-I, AEU Group's security-first IT, infrastructure and consulting practice, can help organizations put the right monitoring, response and hardening measures in place, so that no breach goes unnoticed for long.