In May 2021, people up and down the East Coast started panicking about gasoline. Lines at gas stations stretched around the block. Prices spiked. Some states declared emergencies. The cause? A group of hackers had taken a major fuel pipeline hostage — not with weapons, but with software.

That was the Colonial Pipeline attack, and it’s one of the most dramatic real-world examples of ransomware — a type of cyberattack that has quietly become one of the most destructive forces in digital crime.

What Happened at Colonial Pipeline

Colonial Pipeline carries about 45% of the fuel used by the East Coast. On May 7, 2021, a criminal group called DarkSide broke into their computer systems using a single stolen password for an old VPN account that didn’t have two-factor authentication enabled.

They encrypted Colonial’s data — essentially locking the company out of their own systems — and threatened to release sensitive information publicly unless they were paid a ransom. Colonial shut down operations as a precaution. Six days later, after paying $4.4 million in Bitcoin, they got a decryption tool and slowly restored operations.

All of that — the gas shortages, the panic buying, the emergency declarations — triggered by one leaked password with no second factor protecting it.

So What Exactly Is Ransomware?

Think of ransomware like a padlock that a criminal puts on your front door from the outside. Your house, your stuff — but now you can’t get in. They hold the key and demand payment to give it back.

In digital terms, ransomware is a type of malicious software (malware) that:

  1. Finds its way onto a computer or network
  2. Encrypts your files — documents, photos, databases, everything — making them completely unreadable
  3. Displays a ransom demand: pay us (usually in cryptocurrency) and we’ll give you the key to decrypt your files

No payment, no files. Or so the threat goes. (Paying doesn’t always result in getting your files back, by the way.)

How Does It Get In?

The most common entry points are:

Phishing emails — A convincing fake email tricks someone into clicking a link or downloading an attachment that installs the ransomware. One click by one distracted person on a Tuesday afternoon can bring down an entire company.

Weak or stolen passwords — Exactly as happened with Colonial Pipeline. If an attacker can log in to your systems using stolen credentials, they’re in. If there’s no second layer of authentication to stop them, they have free reign.

Unpatched software — Software vulnerabilities are discovered constantly, and software companies release “patches” (updates) to fix them. When organizations don’t install those updates promptly, they leave known doors open.

Could This Happen to You at Home?

Ransomware most commonly targets businesses, hospitals, schools, and government agencies — organizations with money to pay and urgent need to recover. But individuals are targeted too, often through:

  • Clicking a bad link in a phishing email
  • Downloading something from an unofficial or sketchy source
  • Clicking “enable macros” on a Word document you received unexpectedly

If it hits your home computer, it can encrypt your family photos, tax documents, and everything else on your hard drive.

How to Protect Yourself

Back up your data. This is the single most important thing you can do. If all your files are backed up somewhere separate — an external hard drive kept unplugged when not in use, or a cloud service — ransomware loses its leverage. They can’t hold hostage what you already have a copy of.

Don’t click unexpected links or attachments. Refer to my earlier post on spotting phishing emails. Most ransomware starts with a click on something you shouldn’t have clicked.

Keep your software updated. When Windows or your iPhone says there’s an update available, install it. I know, I know — nobody likes the update prompts. But those updates frequently patch vulnerabilities that ransomware exploits.

Use strong, unique passwords with two-factor authentication. Yes, I keep coming back to this. The Colonial Pipeline attack happened because of one old account with a weak password and no 2FA. The basics matter.

Bottom line: Ransomware is digital kidnapping — it holds your files hostage until you pay up. The defense isn’t complicated: back up your important files, be careful what you click, keep your software updated, and use good passwords with two-factor authentication. Do those four things and you’ve closed the doors criminals depend on most.