What Happens in the First 24 Hours of a Ransomware Attack?

It starts quietly.

A single employee clicks a link in what looks like a routine email. No alarm sounds. No warning flashes across the screen. But somewhere in the background, malicious code begins spreading through your network: silently, methodically, and fast.

By the time most businesses realize something is wrong, the damage is already done.

Ransomware attacks are no longer a distant threat reserved for large enterprises. Today, small and mid-sized businesses, the kind that keep Daytona Beach running, are among the most targeted. And the first 24 hours of an attack are the most critical window you have.

Here's what that timeline actually looks like.

Hour 0–2: The Intrusion You Don't See

Most ransomware doesn't announce itself immediately. After the initial entry point: a phishing email, a compromised credential, an unpatched vulnerability, the attacker's code begins quietly mapping your environment.

This phase is called dwell time, and modern ransomware operators are patient. In some cases they've already been inside your network for days or weeks before triggering the encryption. But once they decide to act, the clock starts moving fast.

During these first hours:

• Malware spreads laterally across connected devices and shared drives
• Backups are targeted first, attackers know to neutralize your recovery options
• Credentials are harvested so the attacker maintains access even if initial entry is blocked
• Your team has no idea anything is happening

This is why prevention and early detection matter so much. By the time you see ransomware, it's already been working against you.

Hour 2–6: The Encryption Begins

The ransom note appears. Screens lock. Files become inaccessible. This is the moment most businesses realize they're under attack, and panic sets in.

Common reactions in this window include:

• Employees trying to restart machines or work around the issue
• IT staff or management attempting to troubleshoot without a plan
• Miscommunication about the scope of what's affected
• Rushed decisions that can actually make things worse

Here's what those rushed decisions often look like: someone shuts down a server mid-encryption, destroying any chance of forensic recovery. Or an employee plugs in an external drive to "save" files, and spreads the infection further.

Without a documented incident response plan, the first few hours of discovery are often the most damaging.

Hour 6–12: The Scope Sets In

Once the initial shock passes, the real assessment begins, and it's usually worse than expected.

Your team (or your IT provider) starts asking hard questions:

• How many devices are affected?
• Are backups intact and isolated, or were they encrypted too?
• Was sensitive data exfiltrated before encryption? (Many modern attacks involve double extortion: encrypt and threaten to publish your data)
• Do you have cyber insurance, and what does it actually cover?
• Are you legally required to notify customers or regulators?

This is also the window where the ransom demand comes into focus. Amounts for SMBs can range from tens of thousands to hundreds of thousands of dollars, and paying is no guarantee you'll get your data back.

Hour 12–24: The Response Decision

By now, your business has effectively stopped. Employees can't work. Customers can't be served. Revenue is bleeding by the hour.

You're now facing three paths:

1. Pay the ransom: fast, but risky, expensive, and it funds future attacks
2. Restore from backups: the best option if your backups are clean, current, and isolated
3. Rebuild from scratch: the worst-case scenario when backups are compromised and you won't pay

The average cost of ransomware downtime for an SMB, including lost productivity, recovery costs, reputational damage, and potential fines, is well into the six figures. And recovery often takes days or weeks, not hours. Can your business absorb a week or more of downtime? Most can't.

The Difference a Managed IT Partner Makes

Businesses with a proactive managed IT partner don't just respond better, they're significantly less likely to reach this point at all.

Here's what that looks like in practice:

• Endpoint detection and response tools that catch suspicious behavior before encryption begins
• Immutable, offsite backups that attackers can't touch
• 24/7 monitoring so threats are identified in minutes, not hours
• Security awareness training so your employees are the first line of defense, not the weakest link

At Vann Data Services, we help Daytona Beach businesses build the layered defenses that keep ransomware from becoming a catastrophe, and the recovery capabilities to bounce back fast if the worst happens.

What to Do Right Now If You're Hit

1. Disconnect, don't shut down. Unplug affected computers from the network and turn off their Wi-Fi, but leave them powered on, so evidence isn't lost.
2. Call your IT provider immediately. The sooner the spread is contained, the less damage is done.
3. Don't pay or contact the attackers until you've talked with your IT provider and your cyber insurance carrier.
4. Notify your cyber insurance carrier. Many policies require prompt notice of an incident.
5. Write down what you see: the ransom note, the time you noticed it, and which computers are affected. Photos of the screens help.
6. Don't wipe or restore anything yet. Restoring too early can destroy evidence or reinfect your systems.
7. Report the attack to the FBI at ic3.gov.

Don't Wait for the Ransom Note

The best time to prepare for a ransomware attack is before it happens. If you don't have a current incident response plan, tested backups, and active endpoint monitoring in place, you're one click away from a very bad 24 hours.

Let's talk. Contact Vann Data Services today to assess your ransomware readiness and make sure your business is protected.