California water utility Cal Water has confirmed that its operational technology (OT) systems remained intact despite a cyberattack by the Iranian hacker group Handala. An investigation aided by Mandiant found no evidence of OT system breaches, alleviating concerns of potential disruptions to the water supply. The Handala group had claimed capability to interfere with the utility's operations, but these claims appear to be unfounded. The involvement of Mandiant in the investigation underscores the severity of the threat and the need for robust cybersecurity measures. The incident highlights the ongoing risks posed by nation-state affiliated hacker groups to critical infrastructure. Cal Water's experience serves as a reminder to utilities and other critical infrastructure providers to remain vigilant and proactive in defending against cyber threats1. This incident matters to cybersecurity practitioners as it signals the evolving nature of cyberattacks and the potential for future breaches, emphasizing the need for enhanced security protocols.