Cyber criminals have used the Windows REvil ransomware to attack Adif , an infrastructure company owned by the Spanish Government , and have published data which was stolen from its dark Web site . The attackers have apparently hit the organisation twice before , and threatened a third attack as soon as the data was published . " We advise you to get in touch immediately . We have personal information including correspondence , contracts and other accounting ( total 800 gigabytes of data ) , " they said in a note posted online . " If you do not comply with our terms , your data will be published in the public domain . We will continue to download your data until you contact us , " they added in surprisingly good English . According to its website , ADIF , the Administrator of Railway Infrastructure , is a state - owned company that answers to the Transport Ministry . The site said Adif played a leading role in promoting the railway sector , working towards converting it into the ideal mode of transport and facilitating access to the infrastructure under fair conditions . ;