How Does Ransomware Get In? 6 Entry Points and How to Close Them

By J. Mesa

Ransomware does not appear out of nowhere. Someone clicks, a password leaks, or an old system sits exposed to the internet. Each attack starts at an entry point, and you can close most of them.

Today, let’s explore the ways ransomware gets into an organization and what to do about each one.

What is ransomware?

Ransomware is malware that encrypts your files and demands payment for the key to unlock them. Many groups now steal a copy of your data first and threaten to publish it. That tactic is called double extortion, and it puts pressure on victims who have good backups.

Ransomware hits businesses of every size. Small companies are frequent targets because they have fewer defenses and less time to recover.

How does ransomware get into a network?

1. Phishing emails. The most common route. An email that looks legitimate carries a malicious link or attachment. One click installs malware or hands over a password.
2. Stolen or weak passwords. Attackers buy leaked credentials or guess weak ones, then log in like an employee.
3. Exposed remote access. Remote Desktop, VPN gateways, and remote management tools that face the internet give attackers a direct door, above all when they lack multi-factor authentication.
4. Unpatched software. Attackers scan for known flaws in operating systems, firewalls, and applications, and exploit the ones nobody updated.
5. Malicious downloads. Fake software updates, pirated programs, and booby-trapped ads install malware when someone runs them.
6. Compromised vendors. An attacker breaks into your IT provider or software supplier and uses that trusted connection to reach you.

Unsecured public Wi-Fi adds risk as well. An attacker on the same network can intercept unprotected traffic or steer you to a fake login page.

What happens after ransomware gets in?

The encryption is the last step, and the attacker spends the time before it preparing.

1. Foothold. The attacker gains access to one computer or account.
2. Exploration. They map your network and look for file servers, backups, and administrator accounts.
3. Escalation. They steal more powerful credentials.
4. Theft. They copy your data out.
5. Encryption. They lock everything at once, often at night or on a weekend.

This can take days or weeks. That gap is your chance to catch them, if someone is watching for the signs.

What are the warning signs of a ransomware attack?

• Logins at odd hours or from unfamiliar locations
• Security software switched off without explanation
• New administrator accounts nobody created
• Backup jobs that fail or get deleted
• Large amounts of data leaving your network
• Files with strange extensions that won’t open

Report any of these right away. Early action can stop the attack before encryption starts.

How do I protect my business from ransomware?

• Think before you click. Don’t open attachments or links you did not expect. Verify requests through a channel you trust.
• Keep software up to date. Install security patches for computers, servers, firewalls, and applications.
• Use strong, unique passwords. Never reuse a password across accounts. A password manager makes this workable.
• Turn on multi-factor authentication. Require it for email, remote access, and administrator accounts.
• Lock down remote access. Don’t expose Remote Desktop to the internet. Put remote access behind a VPN with multi-factor authentication.
• Back up your data. Follow the 3-2-1 rule: three copies, two types of storage, one offline or offsite.
• Use security software. Run reputable antivirus or endpoint protection on every device.
• Limit access. Staff should reach only the files their job needs. Everyday accounts should not have administrator rights.

Do backups stop ransomware?

Backups don’t stop an attack. They let you recover without paying. Three rules make them count:

• Keep one copy offline or in storage the attacker can’t reach from your network. Ransomware looks for backups and destroys them.
• Test a restore on a schedule. An untested backup is a guess.
• Know how long a full restore takes, so you can plan for the downtime.

Backups do not help with stolen data. For that you need to limit what you store and who can reach it.

Should I pay the ransom?

The FBI advises against paying. Payment does not guarantee you get your files back, and it funds more attacks. Some victims who paid received a broken decryption tool or a second demand.

The decision carries legal and business weight. Involve your attorney, your cyber insurer, and law enforcement before you choose.

What should I do if ransomware hits?

1. Disconnect affected computers from the network. Unplug the cable and turn off Wi-Fi. Don’t power them off unless your responder tells you to, because that can destroy evidence.
2. Call for help. Contact your IT provider, your cyber insurer, and an incident response firm.
3. Report it. Notify the FBI at ic3.gov. CISA also takes reports.
4. Preserve evidence. Keep the ransom note and any logs.
5. Check your backups before you restore, to confirm they are clean.
6. Reset passwords from a clean device.
7. Notify affected people if data was stolen, as the law requires.

How do I train employees to stop ransomware?

Your people see the phishing email before any tool does. Teach them:

• What a phishing email looks like, with real examples
• How to report a suspicious message in one click
• That reporting a mistake fast earns thanks, not blame

Run short sessions through the year. A single annual lecture fades within weeks.

Do I need an incident response plan?

Yes. A one-page plan beats none. List who makes decisions, who you call, where the backups are, and how you reach staff if email is down. Print it. You can’t open a file on a locked computer.

Is antivirus enough?

No. Antivirus is one layer. Attackers who log in with a stolen password look like normal users, and antivirus has nothing to flag. You need the full set: patches, multi-factor authentication, backups, limited access, and trained people.

Your next step

Walk through the six entry points above and ask which ones are open at your business. If you’d like help, reach out to our team. Cerberus Cybersecurity builds training and awareness programs that equip your staff to defend themselves and your customers. At Cerberus, it’s people first. Contact us today.