Audit Like a Pro: A DIY Cybersecurity Checklist for the SME Budget
Secure BusinessHub Intelligence
Feb 17, 2026
1. The External Perimeter Check
Start by seeing what the internet sees. Use a free service like Shodan or Censys to search for your company's IP addresses. Are there any open ports (like RDP or database ports) that shouldn't be exposed? Most hackers start by scanning for these simple entry points. If you find one, close it immediately.
Think of this as walking around your house at night to see if any windows are left open.
Leveraging OSINT (Open-Source Intelligence)
OSINT is the practice of collecting information from public sources. For a cybersecurity SME, this means searching for leaked credentials, company documents, or employee information that is already available on the dark web or public repositories like GitHub. Tools like Have I Been Pwned (for domains) or TheHarvester can help you understand what information an attacker already has about your team before they even launch an attack.
2. The Identity Audit
Who has access to what? Open your admin panels for Microsoft 365, Google Workspace, and your main SaaS tools. Look for "Zombie Accounts"—accounts belonging to former employees or contractors that were never deactivated. These are high-value targets for attackers because they are often unmonitored.
3. Vulnerability Scanning
You don't need expensive software to find outdated systems. Use open-source tools like OpenVAS or Nmap to scan your internal network. Look for software versions that reached "End of Life" years ago. If you are running Windows 10 versions from 2022, you are a sitting duck for known exploits.
4. The "Culture" Test
Walk around your office (if you have one) or hold a random security "fire drill" remotely. Can you find sensitive passwords written on sticky notes? Does a random employee click a link in a mock phishing email (you can use free tools like Gophish for this)? Auditing your people is just as important as auditing your servers.
5. Using Compliance as an Audit Framework
If you don't know where to start, use an existing framework. You don't need to be officially certified in ISO 27001 or SOC2 to use their controls as a checklist. For most cybersecurity SMEs, the CIS Critical Security Controls (v8) or the NIST Cybersecurity Framework provide a prioritized list of actions. Focus on the first five controls—they account for roughly 80% of defensive value.
6. Review Your Backups
A backup that hasn't been tested is not a backup. Spend an hour trying to restore a single file from your most critical system. If it takes more than 4 hours to find and restore one file, your disaster recovery plan is broken. As a cybersecurity SME, your resilience depends on your ability to recover, not just to prevent.