Since Russia’s invasion of Ukraine in February, the risk of malicious cyber operations by Russian state-sponsored and criminal cyber actors has increased. The threats to critical infrastructure could impact organisations both within and beyond Ukraine. The Australian Cyber Security Centre (ACSC) in cooperation with international partners, released the most comprehensive view of the cyber threat posed by Russia to critical infrastructure. The advisory includes details on Russian-aligned cyber threat groups, some of whom have threatened to conduct cyber operations in retaliation for perceived cyber offensives against Russia, or against countries or organisations supporting Ukraine. Head of the ACSC, Ms Abigail Bradshaw CSC said recent intelligence and instances of destructive cyber attacks indicate now is the time for organisations to improve their cyber security posture. “In particular, critical infrastructure organisations should act now to raise defences, not wait until being attacked,” Ms Bradshaw said. “The ACSC stands ready to support its critical infrastructure partners in responding to the threats we face - by raising their awareness of the threat, sharing indicators of compromise, and providing technical mitigation advice.” In February, the ACSC published advice to help Australian organisations improve their cyber resilience within a heightened threat environment. This advice is regularly updated. Australian organisations can join the ACSC’s free Partnership Program to receive and share the latest advice, insights and cyber threat intelligence with the Australian cyber security community. All Australians are encouraged to report cybercrime and cyber incidents to the ACSC’s 24/7 Australian Cyber Security Hotline 1300 CYBER1 (1300 292 371), or via ReportCyber.