What is Event Logging and Why it Matters

The Australian Cyber Security Centre (ACSC) reminds us…

“You can’t defend what you can’t see.”

It’s a simple truth that underpins every effective cyber defence strategy and it’s why event logging is the focus of Week 1 of Cyber Security Awareness Month.

What is Event Logging?

Event logging is more than just collecting data. It’s how your organisation gains visibility into what’s happening across your network. From software changes and user actions to signs of malicious activity. Without event logging in place, even the most advanced security tools can miss subtle threats hiding in plain sight.

This is especially true as attackers increasingly rely on “Living off the Land” (LOTL) techniques using legitimate tools like PowerShell, wmic.exe, or curl to move around undetected. Traditional security controls often overlook these behaviours, but well-designed logging helps shine a light on them before they become incidents.

What is “Living off the Land” (LOTL)?

Living off the Land (LOTL) is a tactic where cyber attackers use the same trusted tools and commands already built into your systems like PowerShell or wmic.exe, to carry out malicious actions. Because these tools are legitimate and are often used for everyday admin tasks, their activity can easily blend in and go unnoticed by traditional security tools.

That’s what makes LOTL so dangerous. Attackers don’t need to install new malware to do damage, they just use what’s already there.

The Role of SIEM and SOC in Event Logging

Event logging delivers real value when paired with the right tools and expertise, which is where Security Information and Event Management (SIEM) systems and Security Operations Centres (SOC) play a key role.

• A Security Information and Event Management (SIEM) system aggregates log data from across your environment and uses correlation, analytics, and real-time alerting to detect unusual behaviour or potential threats. By bringing together events from endpoints and servers to network devices and applications, it helps security teams see patterns that individual systems might miss.
• Your Security Operations Centre (SOC) is the team behind the screens. They monitor those alerts around the clock, investigate anything suspicious, and coordinate the response if a cyber threat is confirmed using a combination of technology solutions and a strong set of processes.

While SIEM is the tool that spots potential trouble, the SOC is the human expertise that decides what to do about it. Together, SIEM and SOC turn raw event logs into actionable intelligence, improving visibility across your network.

“We find that organisations often struggle with the complexity of managing SIEM and SOC. Our team at Diamond IT helps simplify this process by providing expert guidance and support, ensuring that our customers have the visibility and response capabilities they need to effectively manage and mitigate cyber threats.” – Martin Thurgate, Director at Diamond IT

How to Strengthen Your Event Logging Strategy

The Australian Cyber Security Centre (ACSC) provides an excellent resource on best practices for event logging and detection, highlighting why visibility is so critical to cyber defence. Building on that, we’ve broken down what this means in practice and how your organisation can start strengthening its event logging approach today.

1. Start with a clear logging policy.
   Define what events you’ll capture, how long you’ll keep them, and how they’ll be monitored. If you work with external providers like your Managed Security Service Partner, make sure roles and responsibilities are clearly documented.
2. Focus on log quality, not just quantity.
   The goal isn’t to collect more data, it’s to collect accurate data. Logs that capture command executions, administrative changes, API calls, and authentication events provide real insight into suspicious behaviour.
3. Cover all your environments.
   On Windows systems, monitor tools like PowerShell, rundll32.exe, and mshta.exe. On Linux, capture curl, python, and systemctl usage. And don’t forget cloud logs like API calls, control-plane changes, and login attempts.
4. Organise for action.
   Store critical logs or “hot” data where they’re quickly searchable for real-time detection and archive “cold” data cost-effectively for forensic analysis later.
5. Account for limitations in Operational Technology (OT) environments.
   If logging isn’t possible on certain devices, use network sensors or out-of-band monitoring to close the visibility gap without disrupting operations.

“In our years as a Managed IT Service Provider, we find that organisations think they’re logging enough, but in reality, logs are often incomplete, inconsistent, or stored in ways that make them difficult to use.

A strong event logging strategy turns that data into a powerful early-warning system, one that helps your team detect threats faster so that you can respond smarter and minimise damage”. – Martin Thurgate, Director at Diamond IT

For additional resources and detailed guidance on event logging best practices, visit the official publication by the Australian Cyber Security Centre here.

For Week 1 of Cyber Security Awareness Month, ask yourself:
👉 Do we have a clear overview of what’s happening on our network?
👉 If a suspicious incident occurs right now, would we know?

How Diamond IT Can Help You Stay Ahead of Cyber Threats

Don’t wait for a breach to find your blind spots. At Diamond IT, we don’t believe in generic solutions. We believe in building security capabilities that fit your business. Solutions that are scalable, adaptable, and designed to keep you resilient as you grow.

Here’s what we do:

• Cyber Risk Discovery: We uncover hidden risks and blind spots across your environment, giving you the clarity to act before issues escalate.
• Cybersecurity Governance: We put the right policies, controls, and oversight in place so your security strategy supports your business objectives and compliance needs.
• IT Disaster Recovery Planning: We help you design and test a practical incident response plan so you can react quickly and minimise damage when an incident occurs.

We’re not here to overcomplicate things. Our team is here to help you focus on what matters most and protect your business the efficient way. Talk to our Cyber Security specialists via phone at 1300 307 907, email us at enquiries@diamondit.com.au or fill out the form below.