Signs Your Small Business Has Been Hacked (And What to Do)

Most cyberattacks on small businesses go undetected for an average of 200 days. By the time you notice something is wrong, attackers may have been inside your systems for months. Knowing the early warning signs can dramatically reduce the damage.

Warning Signs Something Is Wrong

• Computers running unusually slow or crashing more than normal — Malware running in the background consumes system resources. A sudden performance drop with no obvious cause is worth investigating.
• Employees locked out of accounts they access every day — Attackers often change passwords after gaining access to lock legitimate users out.
• Unfamiliar programs, toolbars, or browser extensions — Software that appeared without anyone installing it is a serious red flag.
• Outgoing emails your staff didn’t send — A compromised email account will often be used to send phishing emails to your contacts, damaging your reputation and spreading the attack.
• Files you can’t open, or that have strange new extensions — This is a classic sign of ransomware encrypting your data.
• Antivirus or security software that suddenly turned itself off — Malware specifically targets security tools and disables them to avoid detection.
• Unusual account activity after hours — Logins at 3am from IP addresses in another country are a clear indicator of unauthorized access.
• Unexpected charges or wire transfer requests — Business email compromise (BEC) attacks impersonate executives or vendors to redirect payments.

What to Do Immediately If You Suspect a Breach

• Disconnect affected devices from the network — Don’t turn them off (this can destroy forensic evidence), but unplug them from ethernet and disable Wi-Fi to stop the spread.
• Change passwords from a clean device — Start with email, then banking and financial accounts, then business systems. Enable multi-factor authentication everywhere you can.
• Don’t use the compromised system to investigate — Anything you do on an infected machine can be monitored or manipulated by the attacker.
• Contact your IT provider — If you don’t have one, call a professional immediately. The first hours matter most for containment and evidence preservation.
• Notify your bank — If financial systems were involved, your bank’s fraud team needs to know quickly to stop or reverse unauthorized transactions.

What We Do When a Business Calls Us After a Breach

We isolate affected systems, identify how the attacker got in, remove malware and unauthorized access, restore from clean backups where available, and harden the environment to prevent recurrence. We also help you understand what data may have been exposed — important for insurance, legal, and customer notification purposes.

If something looks wrong, don’t wait. Call (239) 513-1960 — we serve businesses throughout Naples, Bonita Springs, Fort Myers, and the surrounding area.