Cyber Incident Response: Steps to Do in the First 15 Minutes

Cyber Incident Response: Steps to Do in the First 15 Minutes

When a cyber incident strikes, every second counts. The first 15 minutes are critical to containing the threat, minimizing damage, and protecting your business. In this post, we walk you through a clear, actionable checklist that outlines exactly what to do when an incident is detected. Whether you're handling it in-house or working with an MSP like BIT365, these steps are your first line of defense.

Why Every Small Business Needs a Cyber Response Plan

Cyberattacks aren't just a big-business problem anymore. In fact, small businesses are often the preferred target for cybercriminals because they tend to have fewer protections in place. Whether it's a phishing email, a ransomware attack, or suspicious network activity, how you respond in the first 15 minutes can make a world of difference.

A cyber incident can lead to financial loss, stolen data, legal problems, and damage to your reputation. That’s why every small business must have a clear, easy-to-follow plan in place. This article will guide you through what to do in those critical first 15 minutes, using simple language and practical steps you can take right now.

Step 1: Stay Calm and Identify the Issue

The first thing to do when something seems off is to stay calm. Panic can lead to rushed decisions that make things worse. Instead, take a moment to gather facts.

  • Is the issue affecting one device or your whole network?
  • Has anyone received strange emails or links?
  • Are you locked out of any systems?
  • Has sensitive data been exposed?

The more details you can gather, the easier it will be to respond effectively.

Step 2: Disconnect Affected Systems

Once you've identified the source or the affected devices, disconnect them from the internet and internal networks. This helps stop the spread of malware or data leaks.

  • Unplug the Ethernet cable
  • Turn off Wi-Fi
  • Power down the affected machine if needed
  • Notify team members not to use the affected system

Quick containment prevents further damage.

Step 3: Notify Your Internal Response Team or IT Provider

Now it's time to call in your team. If you have an internal response team, like BIT365 provides, alert them immediately. If you're working with an external IT provider or MSP, contact them without delay.

  • Provide a short summary of what happened
  • Share what systems are affected
  • Mention any suspicious emails, files, or behavior
  • Stay available for follow-up questions

At BIT365, our team responds within 15 minutes of an incident being detected. Fast communication helps us get to work immediately.

Step 4: Begin Initial Documentation

Documenting what happened is crucial for both resolving the issue and reporting it later if needed. Start jotting down what you know.

  • Date and time the incident was discovered
  • Who discovered it
  • What systems/data are affected
  • Any steps you’ve already taken

This information helps your response team investigate and close the issue faster.

Step 5: Preserve Evidence

Don’t delete or wipe anything yet. Preserving evidence can help identify how the attack happened and who might be behind it.

  • Don’t reboot devices unless told to do so
  • Don’t delete suspicious emails or files
  • Save any logs or screenshots that show unusual behavior

Evidence is also helpful if law enforcement or cyber insurers get involved later.

Step 6: Notify Stakeholders If Needed

Depending on the situation, you may need to notify employees, customers, or even legal authorities. Clear and timely communication is key to maintaining trust.

  • Inform your leadership or management team
  • Consider informing staff not to use affected systems
  • If customer data is involved, prepare a simple, honest message
  • Check with your IT provider before making public statements

BIT365 can help draft and manage communications in these cases.

Step 7: Activate Your Incident Response Plan

If you have a cyber incident response plan (and you should), now is the time to follow it. The plan should outline roles, responsibilities, and step-by-step procedures for containment, investigation, and recovery.

If you don’t have a formal plan, this article gives you a strong foundation to build one.

  • Follow your documented response procedures
  • Assign roles (who is responsible for what)
  • Begin investigating root causes with your IT provider
  • Stay in regular communication until the issue is resolved

The Takeaway: Response Time Matters

The first 15 minutes of a cyber incident are absolutely critical. A fast, structured response can dramatically reduce the impact on your business. At BIT365, we work with small businesses across Australia to not only respond to incidents, but to prepare for them in advance.

Having a reliable MSP, a strong plan, and a team that knows what to do can mean the difference between a minor hiccup and a full-blown disaster.

Let BIT365 Help You Build a Stronger Defense

If you’re not sure how your business would respond to a cyber incident, we can help. BIT365 offers managed IT services, 24/7 monitoring, and custom incident response planning for small businesses.

Reach out today to schedule a free consultation—let's build your defense before you need it.

Contact the BIT365 Team to Learn More About Our Cybersecurity Services.

Need help right now? Call our response team directly at 1800 248 365 or email support@bit365.com.au. We’re here to help!