Small Business Cybersecurity Best Practices: 5 Essential Strategies to Protect Your Company
Cyber threats are evolving rapidly, but businesses can stay ahead by implementing modern, proactive security measures. Small businesses especially can significantly improve their security posture by adopting a few key strategies. Below, we outline five practical measures, some you can do yourself, and others are services and solutions we specialise in. These strategies are designed to tackle the very threats your business will face.
Harden Microsoft 365 and Windows Systems
If you use Microsoft 365 and Windows PCs (as most businesses do), make sure they’re locked down. This includes enabling strong multi-factor authentication (MFA) on all accounts so a stolen password alone won’t let an intruder in. Steer clear of SMS and email MFA, as these are not considered secure when compared to passwordless, FIDO2 and Microsoft Authenticator.
Keep Windows and Office applications up-to-date with the latest patches as many attacks prey on unpatched software.
Consider securely configuring settings in Microsoft 365, such as disabling legacy authentication, setting up Conditional Access policies (Microsoft 365 Business Premium required!), tuning Microsoft Defender email policies and enabling Microsoft Defender’s vulnerability scanning notifications. Harden Windows desktops by removing local admin rights for users and apply device-based security policies. Protect your sensitive business data on your devices by enforcing on-device encryption.
Why it’s important: By securing your everyday tools and reducing vulnerabilities in your environment, you eliminate many common attack paths.
Strengthen Email Security & Prevent Data Loss
Phishing is the top threat for small businesses making an investment in better email security a must. This means using advanced email filtering and spam protection that can catch tricky emails with QR codes and fake branding. Solutions that can detect fraudulent but seemingly legitimate “Microsoft” emails and scan attachments and links in a safe sandbox before they reach your inbox are the bare minimum.
We also recommend using Data Loss Prevention (DLP) tools to monitor outgoing emails and files. This helps to prevent sensitive information (like driver’s licenses, passport numbers and TFNs) from being sent to unauthorized recipients. DLP can also act as a safety net if an attacker does get in and tries to exfiltrate data, and it can help prevent accidental disclosure of sensitive information by your staff.
Why it’s important: Together, robust email security and DLP mean your employees see far fewer dangerous emails, and your confidential data stays where you can control it.
Implement Application Control Solutions
One of the most effective ways to stop malware like RATs and ransomware is to block programs you don’t trust from ever running. Application control (or “allow-listing”) solutions do exactly that, ensuring that only approved, known-good software executes on your workstations and servers. If never-before-seen malware (and even unapproved software!) makes its way onto a PC, application control will ensure it is unable to launch because it’s not on the approved list.
We help businesses set up application control so that standard office software (Microsoft Office, Adobe Reader, etc.) is allowed, but unknown executables and scripts are stopped cold. This approach can disrupt everything from commodity malware to targeted hacking tools. It’s like having a bouncer for your computers – if a program’s not on the guest list, it’s denied entry. While it requires a bit of tuning to make sure your business apps are all permitted, the security payoff is huge in preventing unauthorized software from wreaking havoc.
Why it’s important: Application Control helps by acting as a strict “no-go” policy for any unapproved applications and malware.
Provide Ongoing Cybersecurity Awareness Training
Your employees can be either the weakest link or your first line of defense, and the best way to ensure the latter is to train them. Phishing emails and social engineering prey on human error which is why regular security awareness training is vital. Security awareness training can teach staff how to spot phishing red flags like generic greetings, mis-spelled domains, and unusual or urgent requests can be beneficial to prevent phishing attacks.
Through interactive courses and simulated phishing tests, employees learn in a hands-on way with minimal disruption to their day-to-day. Over time, these exercises dramatically improve vigilance. In small business, even training the team to pause and verify can stop a disaster – e.g., an employee who receives a supposed email from the CEO to pay an invoice now knows to double-check by phone. Knowledgeable, skeptical employees can thwart phishing and fraud attempts that technology alone might not catch.
Why it’s important: Employees are either your weakest link against cyberattacks, or your first line of defense – training ensures they’re the latter.
24×7 Security Monitoring (SOC as a Service)
Cyberattacks don’t always happen 9–5. Hackers can strike on weekends, holidays, or even at 3 AM on a Tuesday, making it vital to have eyes on your systems around the clock. 24×7 SOC monitoring and threat detection acts as an “alarm system” for your IT environment.
We leverage our partner’s advanced tools to detect suspicious behavior like a login to your systems from an unusual location, a legitimate tool (PowerShell, Remote Desktop, etc.) being used in odd ways at odd hours, or signs of malware reaching out to the internet. If something looks wrong, their team investigates immediately and will begin responding before the situation escalates. For instance, if malware got onto a PC, our partners can catch its attempts to communicate or move laterally, and we could isolate that machine. 24×7 SOC monitoring means you can feel comfortable knowing a dedicated team of cyber analysts are watching your company during all hours of the day. In the modern business world where one breach can spell the end of your business, this kind of proactive monitoring can save you from devastating breaches by catching them early.
Why it matters: Proactive monitoring helps stops breaches before they become disasters.
Additional Resources
- ACSC’s Essential Eight, a great resource for practical security guidance.
- ACSC’s Small business cyber security guide, an excellent guide which includes explanations of different methods of attack and even more tips to secure your business today.