Search

Hardening systems and applications  

Apr 11, 2023 - It is important for all organisations to maintain the cybersecurity of their systems and data.

Essential Eight assessment process guide   Publication

Oct 2, 2024 - This publication provides advice on how to assess the implementation of the Essential Eight.

Essential Eight maturity model   Publication

Nov 27, 2023 - This publication provides advice on how to implement the Essential Eight.

Essential Eight maturity model and ISM mapping   Publication

Oct 2, 2024 - This publication provides a mapping between the Essential Eight and the controls within the Information security manual (ISM).

Learn the basics  

Aug 30, 2023 - Interactive tools and advice to boost your cyber security when online.

Mitigations for network defence   Publication

Oct 15, 2025 - This guidance provides actions for both executives and technical staff to strengthen their organisation’s network infrastructure.

Small business Google Chromebook and ChromOS security guide   Guidance

Nov 12, 2024 - This publication was developed by the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) with technical input from Chrome Engineering.

Protect yourself from ransomware   Guidance

Feb 12, 2025 - A ransomware attack could block you from accessing your device or the information on it. Take some time to consider how a ransomware attack might affect you.

Detecting and mitigating Active Directory compromises   Publication

Jan 22, 2025 - This publication provides an overview of techniques used to compromise Active Directory, and recommended strategies to mitigate these techniques. By implementing the recommendations in this publication, organisations can significantly improve their Active Directory security, and therefore their overall network security posture.

2021 Trends Show Increased Globalized Threat of Ransomware   Advisory

Feb 10, 2022 - This joint Cybersecurity Advisory—authored by cybersecurity authorities in the United States, Australia, and the United Kingdom—provides observed behaviors and trends as well as mitigation recommendations to help network defenders reduce their risk of compromise by ransomware.

2022-004: ASD's ACSC Ransomware Profile – ALPHV (aka BlackCat)   Advisory

Apr 14, 2022 - ALPHV (aka BlackCat, Noberus) is a ransomware variant first observed in late 2021, used by cybercriminals to conduct ransomware attacks against multiple sectors and organisations worldwide, including Australia.

Guidelines for cyber security documentation   Advice

Dec 4, 2025 - This chapter of the Information security manual (ISM) provides guidance on cyber security documentation.

Medibank Private Cyber Security Incident   Alert

Dec 1, 2022 - ASD’s Australian Cyber Security Centre is working closely with Medibank Private following the recent incident.

Guidelines for email   Advice

Dec 4, 2025 - This chapter of the Information security manual (ISM) provides guidance on email.

2020-013 Ransomware targeting Australian aged care and healthcare sectors   Advisory

Aug 2, 2020 - Recently there has been a significant increase in healthcare or COVID-19 themed malicious cyber activity, including targeting of the aged care and healthcare sectors by financially motivated cyber criminals using the ‘Maze’ ransomware.

2021-006: ASD's ACSC Ransomware Profile - Lockbit 2.0   Advisory

Aug 5, 2021 - The LockBit ransomware restricts access to corporate files and systems by encrypting them into a locked and unusable format. Victims receive instructions on how to engage with the offenders after encryption. LockBit affiliates have successfully deployed ransomware on corporate systems in a variety of countries and sectors, including Australia, where the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) is aware of numerous incidents since 2020. LockBit affiliates are known to implement the ‘double extortion’ technique by uploading stolen and sensitive victim information to their dark web site ‘LockBit 2.0’, and threatening to sell and/or release this information if their ransom demands are not met.

CI Fortify   Publication

Oct 13, 2025 - Actionable guidance for CI operators to isolate and rebuild critical services and OT systems during crisis or service disruption.

2021-010: ASD's ACSC Ransomware Profile - Conti   Advisory

Mar 4, 2022 - Conti is a ransomware variant first observed in early 2020, used by cybercriminals to conduct ransomware attacks against multiple sectors and organisations worldwide, including Australia. Conti is offered as a Ransomware-as-a-Service (RaaS), enabling affiliates to utilise it as desired, provided that a percentage of the ransom payment is shared with the Conti operators as commission. This product provides information related to Conti’s background, threat activity, and mitigation advice.

ABC Radio interview with Head of ACSC   News

Mar 31, 2021 - Abigail Bradshaw CSC, Head of Australian Cyber Security Centre, interview with Fran Kelly on ABC Radio National, 31 March 2021.

Cloud shared responsibility model: Executive guidance   Publication

Oct 20, 2025 - This publication is for executives with cyber security responsibilities in government entities, critical infrastructure and large organisations that use or plan to use a cloud service. This guidance aims to strengthen your understanding of the shared responsibility model (SRM), and potential impacts to your cyber security posture and your governance obligations.