A large-scale cyberattack on 17 June paralysed Sepah Bank, one of Iran’s main state-owned lenders, knocking out ATM networks and electronic payment services across the country, according to Iranian media and local reports. The intrusion reportedly erased key financial records at the bank, leaving customers unable to withdraw cash or process card transactions. On-the-ground accounts described ATMs that dispensed no money—or only small sums—while debit cards failed at point-of-sale terminals. Al-Monitor said a hacker group claimed responsibility, stating it targeted Sepah Bank because of the lender’s ties to the Islamic Revolutionary Guard Corps and its alleged role in financing Iran’s ballistic-missile and nuclear programmes. Iranian authorities have not yet disclosed the scale of the damage or given a timeline for restoring services. The incident adds to a series of cyber operations against Iranian infrastructure and highlights persistent vulnerabilities in the country’s banking network.