The Iran-linked group Handala claims it breached California Water Service (Cal Water), one of the largest US investor-owned water utilities, and published a 5GB sample to prove it. Analysts say the attackers reached a customer billing database holding personal data (names, addresses, account and payment details) and an internal GPS-correction server, leaking administrative credentials in the process. Handala framed the attack as retaliation for US actions against Iran and boasted it could disrupt water supply, but researchers stress the evidence does not support that claim, neither system controls water treatment, and the group is known to exaggerate. Cal Water has not yet publicly confirmed the incident.
CISA, the FBI, the NSA, the Department of Energy, and partners have warned that threat actors are targeting internet-exposed automatic tank gauge (ATG) systems used to monitor fuel and liquid storage across the Energy, Chemical, Food and Agriculture, and Transportation sectors. Attackers gain access via authentication-bypass flaws, hardcoded credentials, OS command-execution bugs, SQL injection, and privilege escalation, then modify network settings, product identifiers, tank volumes, and pump controls, and can disable alerts - raising the risk of leaks or equipment failure. The advisory does not formally attribute the activity, but it follows May CNN reporting linking Iranian hackers to similar ATG breaches. Agencies urge removing ATG systems from the internet.
US officials believe Iranian-affiliated actors broke into internet-exposed automatic tank gauge (ATG) systems at gas stations across multiple states, then changed the displayed fuel levels without altering the actual amounts. The intrusions caused no shortages, but falsified ATG readings could theoretically hide a real fuel leak. ATGs have been a known soft target for over a decade. The activity tracks with a broader Iranian push during the war that began in late February: disruptions at US oil, gas, and water sites, shipping delays at Stryker, and the leak of FBI Director Kash Patel's emails. Attribution is preliminary because intruders left almost no forensic evidence.
Symantec's Threat Hunter Team detailed a global cyber-espionage campaign by MuddyWater (a.k.a. Seedworm, Static Kitten, Temp Zagros), an APT linked to Iran's Ministry of Intelligence and Security. The group hit at least nine organizations on four continents in Q1 2026 - including a major unnamed South Korean electronics manufacturer where attackers maintained access from February 20 to 27. They abused signed legitimate binaries fmapp.exe (a Fortemedia audio utility) and sentinelmemoryscanner.exe (a SentinelOne component) to sideload malicious DLLs called fmapp.dll and sentinelagentcore.dll, both carrying the ChromElevator post-exploitation tool that lifts data from Chrome-based browsers. Stolen files were staged through public file-transfer service sendit[.]sh to blend in.
At the Asness Summit in Nashville on April 24, former NSA director Tim Haugh and Mandiant founder Kevin Mandia argued Iran's current cyber posture more closely resembles a criminal actor than a sophisticated APT - reliant on dark-web-purchased credentials, basic security gaps, and information operations to amplify modest intrusions. They cited the March 11 Stryker attack as the template: no malware, no zero-day, just legitimate credentials used to abuse MDM and delete data the attacker had permission to delete. Mandia's CISO advice: assume valid credentials for your staff are already on sale and build detection around their misuse.
A joint FBI/CISA advisory warns that Iranian-affiliated APT actors are actively targeting internet-exposed Rockwell Automation and Allen-Bradley programmable logic controllers across US critical infrastructure - specifically Government Services, Water and Wastewater Systems, and Energy sectors. The attacks have caused financial losses and operational disruptions since March 2026, with the FBI confirming attackers extracted PLC project files and manipulated data displayed on HMI and SCADA systems. The escalation is linked to ongoing hostilities between Iran, the US, and Israel.
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