A Mondelez spokeswoman in Australia had no immediate comment. The Cadbury factory, which employs about 500 people, makes about 50,000 tonnes of chocolate a year, mostly for sale in Australia. Production remained frozen on Wednesday morning and it was unclear when it would resume, Short said. Australian staff of global law firm DLA Piper Ltd were quoted telling domestic media they were shut out of their computer systems because of the attack. DLA Piper said in a statement it was hit by a suspected malware attack and that it was "taking steps to remedy the issue". Australian Cyber Security Minister Dan Tehan said the attack, a month after the similar WannaCry attack, was "a wake-up call to all Australian businesses to regularly back up their data and install the latest security patches". The latest ransomware virus, named "Petya", has crippled computers running Microsoft Corp's Windows by encrypting hard drives and overwriting files, then demanding $300 in bitcoin to restore access. It includes code known as "Eternal Blue", which cyber security experts widely believe was stolen from the U.S. National Security Agency and was also used in the WannaCry attack. Mike Sentonas, regional vice president of U.S. cyber security company CrowdStrike Inc, said it was unclear how many Australian computers were affected by the latest attack but "what is different about this ransomware is its ability to spread, even if a computer has been patched".Ransomware attack comes to Tasmania. This is what Cadbury's Hobart computers look like since 9:30pm #ransomware pic.twitter.com/tZIC16oQNH
— Leon Compton (@LeonCompton) June 27, 2017