French authorities accused Iran's Islamic Revolutionary Guard Corps of cyberattacks in October on the refrigeration systems of around 700 French grocery stores.^[1] The attacks caused extensive food losses and at least 15 fires.^[2] France has formally blamed Iran.^[3] Foreign minister Jean-Noël Barrot attributed the attacks to the Guard Corps.^[4] The attribution is France's. Iran had not publicly responded as of the evening of 9 November.^[5] How it worked The hackers raised the temperature on the cold units they had compromised, to spoil the food inside.^[6] The target was not data. It was the machines that keep a shop's stock cold. The second wave At least two waves of the attacks took place, across October and November.^[7] They reached medical blood banks. Those attacks were stopped before any blood was spoiled.^[8] Who France names France attributed the attacks to a Guard Corps cyber unit called Shahid Kaveh.^[9] The same unit was previously linked to attacks on industrial controllers at water utilities in the United States.^[10] France's cybersecurity agency, ANSSI, identified the same hackers targeting Schneider Electric equipment at a hydroelectric facility.^[11] The response The Paris prosecutor's office opened a judicial investigation against the leadership of the unit.^[12] International arrest warrants were requested for the named suspects.^[13] An investigation is not a conviction. France summoned Iran's ambassador and will pursue European sanctions.^[14] Who has not joined in The United States has not made a formal public attribution of the freezer attacks to Iran.^[15]