Cal Water Finds No Evidence of OT Activity After Hackers Claimed They Could Disrupt Water Supply

The investigation conducted by California Water Service (Cal Water) into the recent cyberattack claimed by the Iranian hacker group Handala found no evidence of activity in the water utility’s operational technology (OT) environment.

Handala, which claims to be a hacktivist collective but is widely believed to be a front for Iranian government hacking operations, said it could have disrupted the water supply after gaining access to Cal Water systems but decided not to do so. The statement suggested that the hackers had gained deep access to industrial control systems (ICS).

The threat actor leaked 5 GB of data allegedly taken from Cal Water systems. Cybersecurity analysts discovered personal information in the published files and found evidence that a customer billing system and an internal application may have been compromised.

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Cal Water, one of the largest investor-owned water...

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