DUBAI, United Arab Emirates—One of Iran’s major steel companies said Monday it was forced to halt production after being hit by a cyberattack that also targeted two other plants, apparently marking one of the biggest such assaults on the country’s strategic industrial sector in recent memory.
The Iranian government did not acknowledge the disruption or blame any specific group for the assault on the state-owned Khuzestan Steel Co. and Iran’s two other major steel producers, which constitutes just the latest example of an attack crippling the country’s services in recent months amid heightened tensions in the region….