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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.
Hardening Linux workstations and servers Publication
Nov 27, 2023 - This publication has been developed to assist organisations in understanding how to harden Linux workstations and servers.
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.
Critical Vulnerability in popular Java framework Apache Struts2 Alert
Dec 14, 2023 - The Australian Signals Directorate’s Australian Cyber Security Centre (ACSC) is concerned about a critical Remote Code Execution (RCE) vulnerability in Apache Struts2. This primarily affects Java applications which use this framework. Apache Struts2 is widely used in enterprise and bespoke Java applications.
First Nations Business Resources Guidance
Jan 5, 2023 - Cybercriminals are finding new ways to target First Nations businesses all the time. There are a few simple things you can do to keep yourself and your business secure online.
Personal cybersecurity: Advanced steps guide Guidance
Mar 23, 2023 - The third and final cybersecurity guide in the personal cybersecurity series is designed to help everyday Australians understand an advanced level of cybersecurity and how to take action to protect themselves from cyberthreats.
Ransomware Playbook Guidance
Oct 10, 2024 - This interactive guide is here to assist you with taking all of the appropriate steps to prepare for, respond to and recover from a ransomware incident.
Best practices for event logging and threat detection Publication
Aug 22, 2024 - This publication defines a baseline for event logging best practices to mitigate cyberthreats.
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.
Protecting Against Cyber Threats to Managed Service Providers and their Customers Advisory
May 12, 2022 - This advisory describes cybersecurity best practices for information and communications technology (ICT), focusing on guidance that enables transparent discussions between MSPs and their customers on securing sensitive data.
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.
Password managers Guidance
May 12, 2025 - Learn how to create and store passwords in a secure location for your important accounts.
Joint advisory released for Managed Service Providers and Customers to mitigate cybersecurity risks News
May 12, 2022 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) has today joined with international cyber security agency partners, to warn Managed Service Providers (MSP) of pressing cyber risks and provide guidance on suitable mitigations for them and their customers.
2022 Top Routinely Exploited Vulnerabilities Advisory
Aug 4, 2023 - This advisory provides details on the Common Vulnerabilities and Exposures (CVEs) routinely and frequently exploited by malicious cyber actors in 2022 and the associated Common Weakness Enumeration(s) (CWE).
U.S., U.K., and Australia Issue Joint Cybersecurity Advisory News
Jul 28, 2021 - Cyber Agencies Share Top Routinely Exploited Vulnerabilities
"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.
Restricting administrative privileges Publication
Nov 27, 2023 - Learn how to restrict the use of administrative privileges. Restricting administrative privileges forms part of the Essential Eight from the Strategies to mitigate cybersecurity incidents.
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.
Cybersecurity for charities and not-for-profits Guidance
Mar 12, 2024 - How to avoid common cyberthreats and protect your mission .
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.
Gootkit Loader continues to be used on multiple Australian networks Advisory
Dec 23, 2022 - The Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) continues to observe instances of Gootkit JavaScript (JS) Loaders on multiple Australian networks in 2022. Open source reporting also indicates continued Gootkit activity.
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.
Guidelines for procurement and outsourcing Advice
Jul 3, 2025 - This chapter of the Information security manual (ISM) provides guidance on procurement and outsourcing activities.
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.
Principles of operational technology cybersecurity Publication
Oct 2, 2024 - Critical infrastructure organisations provide vital services, including supplying clean water, energy, and transportation, to the public. These organisations rely on operational technology (OT) to control and manage the physical equipment and processes that provide these critical services. As such, the continuity of vital services relies on critical infrastructure organisations ensuring the cybersecurity and safety of their OT.
Small Business Cloud Security Guides: Technical Example - Multi-Factor Authentication Publication
Dec 16, 2022 - Multi-factor authentication (MFA) makes it harder for adversaries to use compromised user credentials to access an organisation’s systems. It is one of the most important cybersecurity measures an organisation can implement.
Guidelines for cybersecurity documentation Advice
Jul 3, 2025 - This chapter of the Information security manual (ISM) provides guidance on cybersecurity documentation.
Small Business Cloud Security Guides: Technical Example - Configure Macro Settings Publication
Dec 16, 2022 - Configuring macro settings protects an organisation’s systems from malicious macros. Macros are powerful tools. They were introduced to improve productivity however their functionality can also be used by cyber criminals to compromise a user’s system.
Critical remote code execution vulnerability found in the Log4j library Alert
Dec 21, 2021 - A vulnerability (CVE-2021-44228) exists in certain versions of the Log4j library. A malicious cyber actor could exploit this vulnerability to execute arbitrary code. Australian organisations should apply latest patches immediately where Log4j is known to be used.
Managing the risks of legacy IT: Executive guidance Publication
Jun 12, 2024 - This publication provides high-level and strategic guidance for an organisation’s executive seeking to manage the risks of legacy IT.