We, the Interior Ministers, Immigration Ministers, and Attorneys General of Australia, Canada, New Zealand, the United Kingdom and the United States met in Ottawa on June 26, 2017, to discuss both national security challenges facing our nations and proactive areas for collaboration. Our five country partnership, founded after the Second World War and strengthened during the Cold War, is more relevant today than ever as we deal with the relentless threats of terrorism, violent extremism, cyber-attacks, and international instability, while retaining our deep commitment to the shared values of democracy, human rights and the rule of law.

US-CERT has received multiple reports of Petya ransomware infections in many countries around the world. Ransomware is a type of malicious software that infects a computer and restricts users' access to the infected machine until a ransom is paid to unlock it. Individuals and organizations are discouraged from paying the ransom, as this does not guarantee that access will be restored. Using unpatched and unsupported software may increase the risk of spreading ransomware and other cybersecurity threats.