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Translated information  

Apr 4, 2024 - We have developed easy-to-follow cybersecurity information and resources to support people from non-English speaking backgrounds to be more cyber secure.

Alerts and advisories  

Jan 30, 2023 - Find the latest in cybersecurity alerts and advisories

Hardening Microsoft 365, Office 2021, Office 2019 and Office 2016   Publication

Jul 24, 2023 - Workstations are often targeted by malicious actors using malicious websites, emails or removable media in an attempt to extract sensitive information. Hardening applications on workstations is an important part of reducing this risk.

COVID-19 malicious cyber activity   Alert

May 22, 2020 - Malicious cyber actors are actively targeting individuals and Australian organisations with COVID-19 related scams and phishing emails. These incidents are likely to increase in frequency and severity over the coming weeks and months. This is due, in part, to the ease in which existing scam emails and texts can be modified with a COVID-19 theme.

OS Command Injection Vulnerability in GlobalProtect Gateway   Alert

May 3, 2024 - ASD’s ACSC is aware of a vulnerability (CVE-2024-3400) that enables an unauthenticated attacker to execute arbitrary code with root privileges on the firewall.

Scammers impersonating the ASD's ACSC   Alert

Jun 13, 2025 - Scammers are impersonating the ASD's ACSC sending out phishing emails to the public with the email content suggesting to download a malicious antivirus program.

Home  

Sep 30, 2025 - Welcome to the Australian Cyber Security Centre website - cyber.gov.au

Optus Data Breach   Alert

Sep 30, 2022 - To help protect against fraud, Optus has notified customers to look to reputable sources such as Moneysmart and the Office of the Australian Information Commissioner.

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.

Educational pack for small businesses   Guidance

Jun 15, 2023 - This educational pack provides engaging content to help small business owners learn how to stay cyber secure. Includes practical activities for staff.

Social media terms of use  

May 7, 2024 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) uses a number of social media services as part of its communications activities. These services include Facebook, Twitter, LinkedIn, Vimeo and YouTube. 

After you've made a purchase   Guidance

Once you’ve made a purchase you still need to remain vigilant. Cybercriminals can target you even after you’ve made a purchase on a legitimate website. Learn what to look out for after you’ve bought something online.

Malicious email mitigation strategies   Publication

Oct 6, 2021 - Socially engineered emails containing malicious attachments and embedded links are routinely used in targeted cyber intrusions against organisations. This publication has been developed to provide mitigation strategies for the security risks posed by these malicious emails.

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.

2021-003: Ongoing campaign using Avaddon Ransomware   Advisory

May 8, 2021 - The Australian Cyber Security Centre (ACSC) is aware of an ongoing ransomware campaign utilising the Avaddon Ransomware malware. This campaign is actively targeting Australian organisations in a variety of sectors. This advisory provides details of Avaddon threat actors, dark web activity, targeted countries and sectors, the malware infection chain, and known Techniques, Tools, and Procedures (TTPs). If activity is identified relating to this advisory please report any findings to the ACSC.

For business and government  

Resources for business and government on cyber security.

Creating Strong Passphrases   Guidance

Oct 6, 2021 - The longer your passphrase, the better. As adversaries can crack a short password with very little effort or time, you can increase the time and effort it takes by using a passphrase instead.

Learn the basics  

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

Archived reports and statistics  

Feb 13, 2025 - Search archived report and statistics