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Windows event logging and forwarding   Publication

Oct 6, 2021 - This publication has been developed as a guide to the setup and configuration of Microsoft Windows event logging and forwarding.

APT exploitation of Fortinet Vulnerabilities   Alert

Apr 3, 2021 - Advanced Persistent Threat (APT) actors targeting historic Fortinet vulnerabilities.

Exploitation of vulnerabilities affecting Cisco firewall platforms   Alert

Apr 25, 2024 - This alert has been written for the IT teams of organisations and government. Entities are strongly encouraged to take immediate action to ensure affected devices are patched and investigate for potential compromise.

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.

Update your small business cyber security   News

Jun 12, 2024 - Resources to help protect small businesses from cyber threats.

AI data security   Publication

May 23, 2025 - This publication provides essential data security guidance for organisations that develop and/or use AI systems, including businesses, government and critical infrastructure. It highlights the importance of data security in ensuring the accuracy and integrity of AI outcomes, and presents an in-depth examination of 3 areas of data security risks in AI systems: data supply chain, maliciously modified (poisoned) data, and data drift.

"Bulletproof" hosting providers   Publication

Jan 22, 2025 - Bulletproof hosting (BPH) providers lease cybercriminals a virtual and/or physical infrastructure from which to operate. BPH providers are a specific class of internet infrastructure service that enables malicious actors (including cybercriminals) to host illicit content and run operations on the internet.

Vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway products   Alert

Jan 18, 2024 - ASD’s ACSC is aware of multiple vulnerabilities (CVE-2023-6548 and CVE-2023-6549) in Citrix NetScaler products (NetScaler ADC and NetScaler Gateway). Organisations are strongly encouraged to take immediate action to ensure affected instances are patched.

The Commonwealth Cyber Security Posture in 2022   Reports and statistics

Dec 16, 2022 - The Commonwealth Cyber Security Posture in 2022 (the report) informs Parliament on the implementation of cybersecurity measures across the Commonwealth government, for the period January 2021 to June 2022. As of June 2022, the Commonwealth comprised 97 non-corporate Commonwealth entities (NCCEs), 71 corporate Commonwealth entities (CCEs) and 17 Commonwealth companies (CCs).

Domain Name System security for domain owners   Publication

Oct 6, 2021 - This publication provides information on DNS security for domain owners. It also shared helpful strategies to reduce the risk of domain misuse.

Supply chain compromise of 3CX DesktopApp   Alert

Mar 31, 2023 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) is aware of a reported supply chain compromise affecting the 3CX DesktopApp, allowing malicious actors to conduct multi-stage attacks against users of the legitimate software. Australian users of affected versions of 3CX DesktopApp should immediately follow the vendor’s advice and investigate for signs of malicious activity.

Citrix Products NetScaler ADC and NetScaler Gateway Vulnerabilities   Alert

Nov 29, 2023 - A malicious actor can exploit the vulnerability to execute code remotely without authentication. Organisations using Citrix products NetScaler ADC and NetScaler Gateway, possibly including Government and medium to large organisations. Ensure the latest release of NetScaler ADC and NetScaler Gateway have been installed.

Guidelines for system hardening   Advice

Sep 4, 2025 - This chapter of the Information security manual (ISM) provides guidance on system hardening.

APT40 Advisory   Advisory

Jul 9, 2024 - This advisory, authored by the Australian Signals Directorate’s Australian Cyber Security Centre and international partners, outlines a People’s Republic of China (PRC) state-sponsored cyber group and their current threat to Australian networks.

Hardening Microsoft Windows 11 workstations   Publication

Sep 4, 2025 - This publication provides recommendations on hardening workstations using Enterprise and Education editions of Microsoft Windows 11. While this publication refers to workstations, most recommendations are equally applicable to servers (with the exception of Domain Controllers) using Microsoft Windows Server. Security features discussed in this publication, along with the names and locations of Group Policy settings, are taken from Microsoft Windows 11 version 24H2.

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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.

Advice, guidance and publications  

Nov 3, 2022 - Find the latest cyber security advice, guidance and publications

Report and recover  

Respond to cyber threats and take steps to protect yourself from further harm.

#StopRansomware: BianLian Ransomware Group   Advisory

Nov 21, 2024 - The Federal Bureau of Investigation (FBI), Cybersecurity and Infrastructure Security Agency (CISA), and Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) are releasing this joint Cybersecurity Advisory to disseminate known BianLian ransomware and data extortion group IOCs and TTPs identified through FBI and ASD's ACSC investigations as of March 2023.

Health Sector Snapshot   News

Feb 10, 2021 - This Sector Snapshot is designed to enhance awareness of key cyber security threats in the health sector and advise executives and cyber security professionals within the health sector on what they can do to protect their organisation from cyber threats. This report provides a high-level overview of the cyber security environment from 1 January to 31 December 2020.

Defending against the malicious use of the Tor network   Publication

Oct 6, 2021 - The Tor network is a system that conceals a user’s IP address. It allows anonymous – and often malicious – communication. This guidance shares advice on how to detect and prevent traffic from the Tor network.

2023-01: ASD's ACSC Ransomware Profile - Royal   Advisory

Jan 24, 2023 - The Australian Signals Directorate's Australian Cyber Security Centre (ASD's ACSC) is aware of a ransomware variant called Royal, which is being used by cybercriminals to conduct ransomware attacks against multiple sectors and organisations worldwide, including Australia. Once gaining access to a victim’s environment, cybercriminals use this ransomware for similar purposes to other variants such as encrypting their data and extorting a ransom to return access to the sensitive files.

Enhanced visibility and hardening guidance for communications infrastructure   Advisory

Dec 4, 2024 - This guide provides network engineers and defenders of communications infrastructure with best practices to strengthen their visibility and harden their network devices against successful exploitation carried out by PRC-affiliated and other malicious cyber actors.

Preventing Web Application Access Control Abuse   Advisory

Jul 28, 2023 - The Australian Cyber Security Centre (ACSC), U.S. Cybersecurity and Infrastructure Security Agency (CISA), and U.S. National Security Agency (NSA) are releasing this joint Cybersecurity Advisory to warn vendors, designers, and developers of web applications and organizations using web applications about insecure direct object reference (IDOR) vulnerabilities.

Quishing   Threat

Nov 2, 2023 - Quishing is a form of phishing attack that uses QR codes instead of text-based links in phishing emails, digital platforms or on physical items. Quishing is a social engineering technique used by scammers and malicious actors to trick their victims into providing sensitive personal information or downloading malware onto their devices.

2020 Health Sector Snapshot   Reports and statistics

Feb 22, 2021 - This Sector Snapshot is designed to enhance awareness of key cyber security threats in the health sector and advise executives and cyber security professionals within the health sector on what they can do to protect their organisation from cyber threats. This report provides a high-level overview of the cyber security environment within the health sector over a twelve month period (1 January to 31 December 2020).

Avaddon Ransomware   Alert

May 8, 2021 - Increase in Avaddon ransomware attacks in Australia.

Critical vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway Products   Alert

Jul 4, 2025 - The ASD's ACSC is aware of critical vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway Products (CVE-2025-5349, CVE-2025-5777).