"A virus had penetrated some manufacturing industries in Hormuzgan province, but its progress was halted," Ali Akbar Akhavan said, quoted by the ISNA news agency.
Akhavan said the malware was "Stuxnet-like" but did not elaborate and that the attack had occurred over the "past few months." One of the targets of the latest attack was the Bandar Abbas Tavanir Co, which oversees electricity production and distribution in Hormuzgan and adjacent provinces. He also accused "enemies" of constantly seeking to disrupt operations at Iran's industrial units through cyber attacks, without specifying how much damage had been caused.
Iran has blamed the US and Israel for cyber attacks in the past. In April, it said a voracious malware attack had hit computers running key parts of its oil sector and succeeded in wiping data off official servers.