What is the Essential Eight? Guide for Australian Businesses

Australian businesses face a constantly evolving cyber threat landscape. The Australian Signals Directorate’s (ASD) Essential Eight framework is one of the most practical and widely adopted cybersecurity frameworks in the country. But what exactly is it, and what does implementing it mean for your organisation?

This guide explains the Essential Eight in plain English: what it is, how the maturity levels work, who it applies to, and how to get started.

What is the Essential Eight?

The Essential Eight is a set of eight cybersecurity mitigation strategies developed by the Australian Signals Directorate (ASD) to help organisations protect their systems against a wide range of cyber threats. Originally published as part of ASD’s Strategies to Mitigate Cyber Security Incidents, the Essential Eight represents the baseline controls ASD recommends for all organisations operating in Australia.

The framework addresses three core objectives: preventing malware delivery and execution, limiting the extent of cybersecurity incidents, and ensuring organisations can recover data and system availability after an incident.

While mandatory compliance applies to non-corporate Commonwealth entities under the Protective Security Policy Framework (PSPF), the Essential Eight is widely adopted by Australian businesses across finance, healthcare, legal, and professional services.

The Eight Strategies

Prevent Malware Delivery and Execution

1. Application Control

Prevent unapproved or malicious programs from running on your systems. Only approved, trusted applications can execute.

2. Patch Applications

Keep third-party applications such as browsers, PDF readers, and Microsoft Office updated. Unpatched applications are one of the most common entry points for attackers.

3. Configure Microsoft Office Macro Settings

Restrict or block Microsoft Office macros, which are frequently used to deliver malware via email attachments.

4. User Application Hardening

Configure web browsers and other applications to block features commonly exploited by attackers, such as Flash, Java, and web advertisements.

Limit the Extent of Cybersecurity Incidents

5. Restrict Administrative Privileges

Limit who has administrative access to systems and applications. Admin privileges should only be granted when genuinely needed, for the tasks that require them.

6. Patch Operating Systems

Keep operating systems patched and up to date, particularly for vulnerabilities rated critical or high.

7. Multi-Factor Authentication (MFA)

Require users to verify their identity through multiple factors before accessing systems and data. MFA significantly reduces the risk of credential-based attacks.

Recover Data and System Availability

8. Regular Backups

Back up important data, software, and configuration settings regularly. Test restoration processes to confirm backups work when needed.

Why the Essential Eight Matters for Australian Businesses

According to the ASD’s Annual Cyber Threat Report 2022-23, the ASD received over 94,000 cybercrime reports during the financial year, an increase of approximately 23 per cent from the previous year. The average cost of a cybercrime incident rose to over $46,000 for small businesses and over $97,000 for medium businesses.[1]

The Essential Eight is one of the most cost-effective ways to reduce exposure to the most common attack types. ASD’s research indicates that implementing these eight strategies can prevent the vast majority of cyberattacks targeting Australian organisations.

Beyond risk reduction, Essential Eight compliance is increasingly required in government supply chains and referenced by cyber insurers when assessing policy eligibility and premiums.

Understanding the Essential Eight Maturity Levels

The Essential Eight Maturity Model defines four maturity levels from Level 0 to Level 3. Each level builds on the one before it and reflects increasing sophistication of the threats being defended against.

Who Does the Essential Eight Apply To?

Mandatory for: Non-corporate Commonwealth entities subject to the PSPF, which must reach at least Maturity Level Two across all eight strategies.

Strongly recommended for: All Australian businesses, particularly those handling sensitive client data, operating in regulated industries, or supplying to government.

Increasingly expected by: Clients, cyber insurers, and procurement teams as evidence of baseline cybersecurity practice.

Common Challenges in Essential Eight Implementation

Patching complexity: Keeping all applications and operating systems patched within required timeframes is operationally demanding, particularly in complex environments.

MFA rollout: Implementing MFA across all systems, especially legacy platforms, requires planning and often significant remediation effort.

Administrative privilege management: Many organisations have accumulated far more admin accounts than necessary, and reducing this footprint takes careful planning.

Assessment accuracy: Organisations often self-assess at a higher maturity level than an independent audit would confirm.

How to Get Started

1. Conduct a gap assessment. Understand where you currently stand across all eight strategies and maturity levels.
2. Define your target maturity level. For most private sector businesses, Maturity Level 2 is the right goal.
3. Prioritise remediation. Not all gaps carry equal risk. Focus first on the controls with the greatest impact on your risk profile.
4. Implement controls progressively. Work through each strategy systematically with clear ownership and timelines.
5. Test and validate. Controls must be tested to confirm they work as intended, not just documented.
6. Maintain and review. The threat landscape evolves. Essential Eight compliance requires ongoing maintenance, not a one-time effort.

Frequently Asked Questions