“Iran has been engaged in a cycle of hack and counterhack in a cyberwar against the United States and Israel. Both sides have targeted each other’s financial and sensitive government institutions through cyberattacks for years. The banks affected — Mellat, Tejarat and Sarmayeh — had all been sanctioned more than a year ago by the United States Treasury, which accused them of having transferred money on behalf of blacklisted entities of Iran’s Islamic Revolutionary Guards Corps, part of the armed forces. The entire Revolutionary Guards organization was designated as a terrorist group by the Trump administration last April.”