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Interactive tools and advice to boost your online safety.
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Common online security risks and advice on what you can do to protect yourself.
Respond to cyber threats and take steps to protect yourself from further harm.
Resources for business and government agencies on cyber security.
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Sign up for alerts
Nov 14, 2024 - Sign up for alerts on the latest threats and vulnerabilities.
2022-02: Australian organisations should urgently adopt an enhanced cyber security posture Advisory
Apr 28, 2022 - Entities should follow ACSC advice and act on improving their resilience within a heightened threat environment.
#StopRansomware: Play ransomware Advisory
Jun 5, 2025 - This joint Cybersecurity Advisory (CSA) is part of an ongoing #StopRansomware effort to publish advisories for network defenders that detail various ransomware variants and ransomware threat actors.
Australian organisations encouraged to urgently adopt an enhanced cyber security posture Alert
Mar 28, 2022 - Australian organisations are encouraged to urgently adopt an enhanced cyber security posture. Organisations should act now and follow ACSC’s advice to improve their cyber security resilience in light of the heightened threat environment.
Scattered Spider Advisory
Jul 30, 2025 - This joint Cybersecurity Advisory is in response to recent activity by Scattered Spider threat actors against the commercial facilities sectors, subsectors, and other sectors. This advisory provides tactics, techniques, and procedures (TTPs) obtained through FBI investigations as recently as June 2025
Social engineering Threat
May 29, 2025 - Social engineering is a significant threat to individuals and organisations, enabling malicious actors to compromise accounts, devices, systems or sensitive information.
Update your small business cyber security News
Jun 12, 2024 - Resources to help protect small businesses from cyber threats.
Strategies to mitigate cybersecurity incidents Publication
Feb 1, 2017 - The Australian Signals Directorate (ASD) has developed prioritised mitigation strategies to help organisations mitigate cybersecurity incidents caused by various cyberthreats. This guidance addresses targeted cyber intrusions (i.e. those executed by advanced persistent threats such as foreign intelligence services), ransomware and external adversaries with destructive intent, malicious insiders, ‘business email compromise’, and industrial control systems.
Report and recover
APT exploitation of Fortinet Vulnerabilities Alert
Apr 3, 2021 - Advanced Persistent Threat (APT) actors targeting historic Fortinet vulnerabilities.
Geo-blocking in context: Realities, risks and recommendations Publication
May 19, 2025 - This guidance is intended for decision makers and cybersecurity practitioners. It highlights what to be aware of when identifying the source of a threat and the potential implications of geo-blocking in a broader cybersecurity strategy.
Australia joins US and UK to warn of 2021 Ransomware trends News
Feb 10, 2022 - Ransomware continues to be a global threat, and cybercriminals using ransomware pose a significant risk to Australian organisations and households.
Strategies to mitigate cyber security incidents
Aug 30, 2023 - The Australian Signals Directorate has developed prioritised mitigation strategies to help organisations mitigate cyber security incidents caused by various cyber threats.
Choosing secure and verifiable technologies: Executive guidance Publication
Dec 5, 2024 - This guide supports senior leaders to enable their organisations to understand their threat environment and make better-informed assessments and decisions to procure secure technologies.
Foundations for modern defensible architecture Publication
Feb 10, 2025 - The Foundations represent the first step to help organisations adopt a ‘modern defensible architecture’ approach, which will enable them to evolve alongside the threat landscape.
Quiz library Guidance
Test your knowledge about cyber security practices and threats through our quizzes.
Consider your cyber hygiene in light of global events News
Jul 1, 2025 - Around the world, geopolitical tensions remain complex as nations navigate diplomatic, economic, and military challenges. ASD’s ACSC recommends that organisations continue to review their current cyber security posture and maintain sufficient monitoring for cyber threats.
Guidelines for cybersecurity incidents Advice
Jul 3, 2025 - This chapter of the Information security manual (ISM) provides guidance on cybersecurity incidents.
The silent heist: cybercriminals use information stealer malware to compromise corporate networks Advisory
Sep 2, 2024 - Information stealer malware steals user login credentials and system information that cyber threat actors exploit, predominantly for monetary gain. Information stealers have been observed in attacks against multiple organisations and sectors worldwide, including Australia. This advisory provides readers with cyber security guidance on information stealers, including threat activity and mitigation advice for individuals and organisations.
#StopRansomware: LockBit 3.0 Ransomware Affiliates Exploit CVE 2023-4966 Citrix Bleed Vulnerability Advisory
Nov 29, 2023 - This joint Cybersecurity Advisory (CSA) is part of an ongoing #StopRansomware effort to publish advisories for network defenders that detail various ransomware variants and ransomware threat actors.
Strategies to mitigate cybersecurity incidents: Mitigation details Publication
Feb 1, 2017 - The Australian Signals Directorate (ASD) has developed prioritised mitigation strategies to help cybersecurity professionals in all organisations mitigate cybersecurity incidents caused by various cyberthreats. This guidance addresses targeted cyber intrusions (i.e. those executed by advanced persistent threats such as foreign intelligence services), ransomware and external adversaries with destructive intent, malicious insiders, ‘business email compromise’, and industrial control systems.
Gateway security guidance package: Gateway operations and management Publication
Jul 29, 2025 - This guidance is one part of a package of documents that forms the Australian Signals Directorate (ASD)’s Gateway security guidance package written for audiences responsible for the operation and management of gateways.
Cyber security research report Reports and statistics
Dec 15, 2020 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) commissioned exploratory research to better understand audience awareness of cyber security threats and practices.
Head of ACSC talks cyber security with Natarsha Belling in podcast special News
Nov 29, 2021 - Ms Abigail Bradshaw, head of the Australian Cyber Security Centre (ACSC), recently sat down with journalist Natarsha Belling to discuss the common cyber threats affecting Australians today.
New Secure by Demand guidance available for operational technology owners and operators News
Jan 14, 2025 - To protect your systems from threat actors targeting your operational technology components, select products from manufacturers who are Secure-by-Design. Find out which security elements to prioritise.
BADBAZAAR and MOONSHINE: Technical analysis and mitigations Advisory
Apr 9, 2025 - This guidance has been jointly produced by government agencies from the UK, Australia, Canada, Germany, New Zealand, and the US and is supported by members of the NCSC Cyber League. Its provides new and collated threat intelligence on two spywares known as MOONSHINE and BADBAZAAR with guidance for how App store operators, developers and social media companies can keep their users safe.
Australian Signals Directorate unveils new facility News
Mar 23, 2022 - The Australian Signals Directorate (ASD) has unveiled a new world-class cyber and foreign intelligence facility, as the agency prepares to mark 75 years defending Australia from global threats.
Convoluted layers: An artificial intelligence primer Publication
May 21, 2025 - Rapid advances in artificial intelligence (AI), along with public releases of AI products, have prompted governments, businesses and criminals to accelerate efforts to incorporate this new technology into their operations. This advice provides definitions for some of the most commonly encountered AI terms in cybersecurity and a brief typology of cyber threats that will arise from AI.
TMUI remote code execution vulnerability - CVE-2020-5902 Alert
Jul 6, 2020 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) advises users of F5’s enterprise and data centre BIG-IP products to ensure their systems are promptly patched after the recent disclosure of new remote code execution vulnerability.
Personal cyber security: First steps guide Guidance
Apr 14, 2023 - The first of three cyber security guides in the personal cyber security series is designed to help everyday Australians understand a basic level of cyber security and how to take action to protect themselves from cyber threats.
