Why Financial Services Firms Need to Implement the ACSC Essential 8

Any financial services firm knows that trust is everything. Customers rely on you to protect some of the most sensitive data they possess, ensure secure transactions, and maintain system availability at all times. But that fragile trust is under constant threat – and the smallest mistake can lead to irreparable damage. Threat actors are increasingly targeting financial institutions, drawn by the potential for large payoffs.

To stay ahead of the danger, you must implement strong security measures. But with so much conflicting advice, you may not even know where to start. Fortunately, the Australian Cyber Security Centre (ACSC) has a solution: The Essential 8.

The Consequences of Ignoring Financial Services Cyber Security

Finance is now one of the most commonly targeted industries. It’s no longer a matter of whether you experience a cyber-attack – it’s about whether your business will be strong enough to survive it. The consequences of a data breach can be crippling:

• Financial losses from downtime, recovery, ransomware attacks, or legal fees.
• Regulatory penalties for failing to obey data security laws.
• Reputational damage that erodes trust and loyalty.
• Loss of critical data that your business needs for daily operations.

Underestimating the risks involved is a severe error that could set your company back by years. This is why cyber security frameworks, like the Essential 8, are crucial.

How the ACSC Essential 8 Framework Solves These Challenges

The ACSC’s Essential 8 framework provides a set of strategies designed to reduce the likelihood and severity of cyber threats. It is built from the ground up to be accessible, practical, and easily scalable. The intention is that any business, regardless of their size, growth plans, or current IT capabilities, can implement these measures to improve their security.

This framework is particularly valuable for the financial services industry, as it allows you to focus on high-value activities that reduce risk without significant capital expenditure.

What Are the Essential 8 Controls?

The Essential 8 controls are as follows:

1. Application Control: Prevent unauthorised applications from running on company devices.

2. Patch Applications: Update third-party software to address vulnerabilities.

3. Configure Microsoft Office Macro Settings: Block malicious macros in documents.

4. User Application Hardening: Limit the attack surface by disabling risky features.

5. Restrict Administrative Privileges: Limit access to sensitive accounts.

6. Patch Operating Systems: Keep operating systems up-to-date with the latest security patches.

7. Multi-Factor Authentication: Require multiple forms of verification to access accounts.

8. Regular Backups: Ensure data can be restored after an attack or system failure.

Each of these controls is designed to address a specific tactic commonly used by threat actors. Together, they form a layered defence strategy that protects your business far more effectively than scattered, isolated policies.

Implementing the Essential 8: Your Step-by-Step Guide

While the list above may seem long and full of complicated technical terms, the Essential 8 is actually a fairly simple framework to implement. Here is a breakdown of the steps involved:

1. Assess Your Current Security Posture

Start by determining where your business currently stands, and which vulnerabilities must be addressed. The ACSC provides a useful Maturity Model to help you figure this out.

2. Prioritise Based on Risk

Not all controls need to be fully implemented at once – and depending on your resources, it may not be realistic to jump from Level Zero to Level Three in a day. Focus first on the most critical risk factors your business faces, and the easiest controls to implement. Work backwards from there.

3. Develop a Roadmap

Create a plan that aligns with your objectives, budget, and compliance requirements. Think about roles, responsibilities, required resources, and timelines for each phase.

4. Invest in Tools and Training

Implement the right solutions to assist in implementation. For example, consider where backups will be stored. Provide training for staff who may be unfamiliar with the Essential 8 or the new security controls.

5. Implement Your Controls

Introduce security controls in phases, so you can correct any errors or disruptions along the way. Check that each functions as expected.

6. Monitor and Adapt

Cyber security is never a set-and-forget process, even when you’re following a framework. You will need to continuously monitor for new threats, adjust your controls, and maintain alignment as the framework evolves.

Common Pitfalls (and How to Address Them)

Even with the most organised approach possible, you may hit roadblocks as you adopt the Essential 8. Here are some of the most common challenges, and methods for solving them:

• I’m Overwhelmed: You may be trying to implement too many controls at once. Break the process down into phases. Start small and build from there. If you find it difficult to wrap your head around the framework, partnering with a managed service provider (MSP) is another valuable solution.

• I Implemented the Controls and Still Experienced a Cyber-Attack: Remember that compliance with the Essential 8 is a baseline. It reduces your chances of experiencing an attack, but never to zero. Continue adding more security measures as resources allow, and develop an incident response plan to account for threats that slip through the cracks.

• My Staff/Stakeholders Hate the Idea: Many stakeholders assume that compliance measures will slow down operations – and staff may be worried about additional workload. Allow them to express any concerns they might have, and gently but firmly dispel them. Remind everyone that these measures exist to make their jobs easier, not harder.

• No one Knows What They’re Doing: It’s possible you haven’t provided enough training. Remember that not everyone will be experienced with the Essential 8 or how these new security measures work. Set aside time to educate staff, and create space for them to come to you with questions.

Learn how to build upon the Essential 8 Framework

Make Security Your Biggest Strength

Strong defences are not optional – they need to be the foundation upon which your entire business rests. The ACSC Essential 8 controls demystify financial services cyber security, offering a clear and achievable way to protect your most valuable assets while ensuring better regulatory compliance. With the right strategy, tools, and team, you can empower your business to weather any storm threat actors have planned.

Need help getting started? Itopia has you covered. We reinvent your security posture with advanced solutions, using the Essential 8 as a baseline to ensure a comprehensive approach. If you’re ready to make cyber security a strength and not a weakness, explore our IT services today.

Adam Dodds

Adam leads the Itopia team in Brisbane, helping professional-services firms get secure, productive and confident with their technology, in plain English.