"No impact has been observed on the operations of the Grand Palais, where the Olympic events on Sunday proceeded without any issues," reads the announcement about the incident."As for the 36 museum shops managed by the Grand Palais Rmn, they are operating normally, autonomously, and the museums and their shops remain open to the public under usual conditions."Grand Palais Rmn says it immediately informed ANSSI (France's cybersecurity taskforce), the National Commission on Informatics and Liberty (CNIL), and the Ministry of Culture about the cyberattack.ANSSI is currently helping in the remediation and network restoration process, while preliminary investigations have not unearthed any signs of data exfiltration from the compromised systems.However, the threat actors allegedly left a ransom note demanding a payment in cryptocurrency or they would leak data stolen in the attack.LeMagIT's editor-in-chief Valery Marchive reports there's credible evidence the attack might have been caused by a hijacked account of a collaborator of Grand Palais Rmn, whose credentials were stolen by info-stealer malware.No ransomware groups have assumed responsibility for the attack, so the threat actors remain unknown.