Ransomware encrypts files and demands payment for the decryption key. The first documented case was in 1989, distributed on floppy disks. The modern version is a criminal industry. Groups like LockBit, BlackCat, and Cl0p operate affiliate programs. Affiliates break in, deploy the malware, and negotiate the ransom. The developers take a cut. Ransom demands have reached tens of millions of dollars. Colonial Pipeline paid $4.4 million in 2021 after a ransomware attack shut down fuel delivery across the eastern United States.

Modern ransomware does not just encrypt. It steals data first and threatens to publish it if the victim does not pay. That double extortion tactic pressures organizations that have good backups. Even if they restore from backup, the data leak remains. Some groups skip encryption entirely and just threaten to leak stolen files. The response has improved. Backups are more resilient. Law enforcement has disrupted major groups. But the problem is not solved. Ransomware crews adapt, rebrand, and return. The fundamentals still matter: patch, segment, back up offline, and rehearse recovery.

Ransomware defense essentials

• Offline backups — immutable copies that cannot be encrypted
• Patching — close the vulnerabilities attackers use
• Segmentation — limit how far the malware spreads
• MFA — block credential-based initial access
• Recovery drills — practice restoring before the real incident

Paying the ransom funds the next attack. It also does not guarantee the data comes back. Recovery from backup is the only reliable path.