What is Ransomware?

Ransomware is malicious software designed to deny access to computer systems or data until a ransom is paid.

Once it infiltrates a network, it typically encrypts files and displays a ransom note demanding payment—usually in cryptocurrency—in exchange for the decryption key. The reality is grimmer than it sounds: paying doesn't guarantee recovery, and it funds criminal enterprises that use those profits to develop more sophisticated attacks.

Modern ransomware operations have evolved into full-fledged criminal businesses, complete with customer service portals, negotiation teams, and even "ransomware-as-a-service" models where affiliates carry out attacks using another group's tools.

Some variants exfiltrate sensitive data before encryption, threatening to publish it if the ransom isn't paid—a tactic called double extortion. Triple extortion adds another layer, targeting customers or partners of the victim. The attacks have grown more targeted, with criminals researching victims to understand how much they might pay and which systems matter most to their operations.

The first known ransomware appeared in 1989 when Joseph Popp distributed 20,000 infected floppy disks labeled "AIDS Information – Introductory Diskettes" to attendees of a WHO conference. His malware encrypted file names and demanded $189 sent to a post office box in Panama. It was primitive by today's standards and easily defeated, but it established the core concept.

Ransomware remained relatively dormant until the mid-2000s, when improved encryption algorithms and anonymous payment methods made it viable at scale. The 2013 emergence of CryptoLocker marked a turning point—it used strong encryption that was genuinely difficult to break and leveraged Bitcoin for anonymous payments.

From there, the threat exploded. WannaCry in 2017 infected hundreds of thousands of computers worldwide, exploiting a Windows vulnerability and demonstrating how quickly ransomware could spread. NotPetya followed weeks later, causing billions in damages while masquerading as ransomware but functioning more like a wiper. These incidents proved that ransomware had evolved from a nuisance into a strategic threat capable of disrupting critical infrastructure, healthcare systems, and supply chains.

Ransomware has become one of the most disruptive and expensive cybersecurity threats organizations face. Healthcare systems have been forced to divert ambulances when their networks were encrypted. Municipal governments have lost years of records. Supply chain attacks have cascaded through entire industries.

The financial impact extends well beyond ransom payments—recovery costs, business interruption, regulatory fines, legal fees, and reputation damage often dwarf the initial demand. The average downtime now stretches into weeks, and some organizations never fully recover.

What makes ransomware particularly insidious is how it exploits human and organizational weaknesses: phishing emails, unpatched systems, poor access controls, inadequate backup strategies. Attackers often maintain access for weeks or months before deploying ransomware, mapping networks and disabling backups to maximize impact.

The rise of ransomware-as-a-service has lowered the barrier to entry, enabling less sophisticated criminals to launch devastating attacks. Meanwhile, geopolitical tensions have blurred lines between criminal gangs and state-sponsored actors, with some groups operating with apparent impunity from countries that benefit from the chaos they create.

Plurilock helps organizations prevent, detect, and respond to ransomware threats through layered defenses and battle-tested incident response capabilities. Our adversary simulation services test your defenses against real-world ransomware tactics before criminals do, identifying vulnerabilities in email security, endpoint protection, backup systems, and access controls.

When prevention fails, our emergency response team mobilizes rapidly to contain the threat, preserve forensic evidence, and guide recovery decisions.

We've seen every variant and negotiation tactic, and we help organizations navigate the impossible choices ransomware creates—not with generic playbooks, but with experienced practitioners who understand the technical and strategic dimensions of each incident.