---
title: "Evolution of Ransomware: From Basic Encryption to AI-Powered Quadruple Extortion"
description: Explore the evolution of ransomware from basic encryption to sophisticated quadruple extortion tactics, highlighting the role of AI in modern cyberattacks.
image: https://blog.isecauditors.com/hubfs/Evolucion-del-ransomware-del-cifrado-basico-a-la-extorsion-cuadruple-con-ia.png
---

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# Evolution of Ransomware: From Basic Encryption to AI-Powered Quadruple Extortion

[Edwin H. Garzón](https://blog.isecauditors.com/en/author/edwin-h-garzón)  Oct 7, 2026, 10:30:01 AM

There was a time when suffering a ransomware attack meant, almost literally, turning on a computer and discovering that the files could no longer be opened.

Documents, photographs, databases, and shared folders appeared encrypted. Somewhere on the desktop, a note would be left with instructions for making a payment, usually in cryptocurrency, in exchange for a supposed recovery tool. Many organizations across different countries experienced this type of attack.

The mechanism was remarkably simple: **lock the information and charge to return access to it.**

That model no longer adequately describes what happens today.

Modern ransomware has evolved into a much broader criminal operation. For example, attackers may remain inside an infrastructure for days or even weeks, studying the organization, identifying critical servers, locating backups, extracting confidential information, and determining which data can generate the greatest pressure on the victim.

Only then does the extortion begin. While encryption remains important, it is now just one of several tools available to attackers.

At the same time, the introduction of artificial intelligence into this ecosystem is accelerating the transformation. Not because AI invented ransomware, but because it enables the automation of tasks that previously required time, specialized operators, and significant manual effort.

The result is both concerning and deserving of serious attention: **faster, more personalized attacks capable of operating at a much larger scale.**

# When Encrypting Files Was Enough

It is worth remembering that between 2013 and 2016, the model that many people still associate with the term *ransomware* became firmly established. Campaigns such as CryptoLocker infected systems, encrypted files, and then demanded payment in exchange for restoring access.

The economic logic was straightforward. Attackers needed the victim to have something valuable stored on the computer and, equally important, to lack a backup from which the data could be restored.

For this reason, during those years, one of the most effective recommendations was to maintain reliable backups. If an organization could reinstall affected systems and recover its information from a clean backup, much of the criminal's leverage disappeared.

Attackers eventually recognized this weakness in their own business model. As companies improved their backup and recovery capabilities, ransomware operators began to evolve their tactics in search of new ways to increase pressure on their victims.

# Year 2017: Ransomware Discovers It Can Also Spread

The year 2017 changed the global perception of this threat. It began with WannaCry, which demonstrated that an incident no longer had to depend on each user executing a malicious file. By exploiting a Windows vulnerability known as EternalBlue, associated with the SMB protocol familiar to many cybersecurity professionals, the malware was able to spread automatically between vulnerable systems.

The impact reached more than 200,000 computers across approximately 150 countries. Hospitals, businesses, government organizations, and workstations were compromised within a matter of hours.

Just a few weeks later, NotPetya emerged. At first glance, it displayed many of the characteristics of ransomware, but its behavior revealed something even more concerning: behind what appeared to be a financially motivated operation, there could be a campaign whose real objective was destruction rather than profit.

From that point onward, the conversation could no longer focus solely on backups.

Organizations had to start talking about vulnerability management, network segmentation, service exposure, patch management, and lateral movement. A single vulnerable machine could become the entry point to hundreds of additional systems.

This marked another major evolution in ransomware, transforming it from a localized threat affecting individual devices into a large-scale operational risk capable of disrupting entire organizations and critical services.

# The Backup Problem for Cybercriminals

 Over time, many organizations significantly improved their backup and recovery strategies. For ransomware operators, this created a very simple problem:

An organization could respond:  
*"I don't need to pay. I have a backup of my data."*

Criminal groups needed to regain the upper hand. Their solution was to steal the data before encrypting it. This is how **double extortion** emerged.

At that point, it no longer mattered only whether an organization could restore its servers. Attackers could claim possession of confidential employee information, customer records, contracts, intellectual property, financial documents, or internal credentials.

Even if the organization restored all affected systems and refused to pay, a second threat remained: the public release of the stolen data.

Groups such as **Maze** helped popularize this model between **2019 and 2020** through dedicated leak sites where they exposed information belonging to organizations that refused their financial demands.

Other operators soon adopted very similar strategies. One notable example was REvil/Sodinokibi, which also helped consolidate another key element of the ransomware ecosystem: **Ransomware as a Service (RaaS).**

Ransomware was increasingly evolving from a standalone attack tool into a commercialized service model. Developers created and maintained the ransomware platform, while affiliates conducted the attacks and shared a percentage of the profits.

As a result, ransomware became less like an isolated criminal activity and increasingly like a structured and highly profitable business.

# From Malware to a Criminal Industry

 The RaaS (Ransomware as a Service) model transformed the economics of ransomware.

Not every participant in an operation needs to develop malware anymore. Today, one group may maintain the infrastructure, develop the ransomware itself, manage payment systems, and operate data leak portals, while affiliates focus on gaining access to organizations and carrying out attacks. In some cases, even the initial access can be purchased.

This is where the so-called **Initial Access Brokers (IABs)** come into play. These actors compromise corporate networks in advance and then sell that access to other cybercriminals.

As a result, a modern ransomware intrusion may involve several different participants.

One actor obtains the credentials. Another establishes persistence within the environment. An affiliate deploys the tools. The ransomware operator provides the infrastructure. Someone else may be responsible for handling negotiations with the victim.

In other words, ransomware attacks have evolved into highly specialized operations in which each participant performs a specific role within a broader criminal ecosystem.

This level of specialization helps explain why ransomware has scaled so dramatically in recent years. By dividing tasks among different actors, criminal groups can operate more efficiently, target more organizations, and continuously refine their tactics, techniques, and procedures.

The result is an ecosystem that increasingly resembles a professionalized industry rather than a collection of isolated cybercriminals. As barriers to entry have fallen, more actors have been able to participate, accelerating both the frequency and sophistication of ransomware attacks worldwide.

# Triple Extortion: Targeting More Than Just Servers

 When stealing and encrypting data began to prove insufficient in some operations, a third layer of extortion emerged. Pressure could now be directed at other people connected to the victim organization.

Imagine an organization that has just suffered a breach. While the security team is trying to contain the incident, some customers receive emails informing them that their data has been stolen. A supplier receives a similar notification. Shortly afterward, someone contacts a senior executive directly.

At this point, the situation is no longer purely technical.

The organization is facing a crisis involving reputation, communications, and trust. The attacker seeks to turn every business relationship the victim has into a source of pressure.

This approach is particularly effective in sectors where confidentiality is critical, such as financial institutions, insurance companies, law firms, healthcare organizations, technology providers, and government entities.

But the evolution did not stop there.

A fourth layer appeared.

Some operations began incorporating Distributed Denial-of-Service (DDoS) attacks as an additional pressure mechanism.

While the victim organization is attempting to restore systems, investigate the intrusion, and manage a potential data breach, attackers may also seek to disrupt services that remain publicly available.

The result is a scenario that combines four different elements:

1. **Encryption of systems.**
2. **Theft of information.**
3. **Pressure on customers, employees, suppliers, or executives**
4. **Additional disruption through DDoS attacks or other coercive tactics.**

 This is where the concept of **quadruple extortion** originates.

Not every incident necessarily uses all four techniques, nor is there a standard sequence that attackers always follow. What matters is understanding that the objective is no longer simply to encrypt computers.

Today, the real goal is to identify enough pressure points to make resistance increasingly costly for the victim.

This evolution can be summarized as follows:

![evolution-of-ransomware-from-basic-encryption-to-AI-powered-quadruple-extortion](https://blog.isecauditors.com/hs-fs/hubfs/ISEC%20Media/Blog%20Media/evolution-of-ransomware-from-basic-encryption-to-AI-powered-quadruple-extortion.jpg?width=856&height=491&name=evolution-of-ransomware-from-basic-encryption-to-AI-powered-quadruple-extortion.jpg)

La tabla muestra algo muy importante: cada generación no elimina necesariamente a la anterior, las técnicas se acumulan, se mejoran o evolucionan.

Un atacante actual todavía puede cifrar archivos, explotar una vulnerabilidad conocida o enviar phishing tradicional. La diferencia es la cantidad de alternativas disponibles y la facilidad para combinarlas.

Entonces llegó la inteligencia artificial: Ahora existe una cierta tendencia a presentar la IA como si hubiera creado una nueva generación completamente desconocida de ciberataques, muchas técnicas ya existían, hablamos del reconocimiento, Phishing, ingeniería social, desarrollo de scripts, análisis de información robada, evasión, Vishing, entre muchas más y realmente lo que está cambiando es la velocidad y el costo necesario para realizarlas.

# Stolen Data Can Now Be Analyzed Automatically

 There is another application of AI that receives less attention but is tremendously valuable to extortionists. Imagine that, after compromising an organization, attackers extract hundreds of gigabytes of documents.

Which information is actually important? Reviewing everything manually takes time. Automated classification systems can help identify contracts, financial information, credentials, legal documents, personal data, or files related to specific executives.

This transforms a mountain of stolen information into something far more dangerous: **information classified according to its ability to generate pressure.**

From an attacker's perspective, not all files have the same value. A single confidential PDF may be far more useful than ten thousand administrative documents. One of the most interesting consequences of this evolution is that some threat actors have reduced or even abandoned encryption altogether. The reasoning is simple.

Encrypting thousands of systems creates noise. EDR solutions can detect certain behaviors. Large-scale file operations generate anomalies. In addition, deploying ransomware introduces another opportunity for something to fail.

If the attacker has already obtained sufficiently sensitive information, direct extortion may be a more efficient path, avoiding additional risks and operational steps. This evolution carries an important implication for security leaders: Focusing solely on encryption behaviors means looking too late in the attack chain.

# The Real Attack Happens Before the Ransomware

 When a ransom note appears, the organization has most likely been compromised for a considerable period of time. This point is often overlooked in discussions about ransomware. The file-encrypting executable is merely the visible part of the attack.

Before that, many other activities may have occurred:

Access through compromised credentials, Internal reconnaissance, Privilege escalation, Lateral movement, Disabling security controls, Access to Active Directory, Discovery of backup systems, Data exfiltration. This is why a strategy focused exclusively on “detecting ransomware” is inherently limited.

Organizations need to detect the intrusion that may eventually lead to ransomware. An unusual authentication event can be more important than a malware signature. An administrative account being used from an unexpected location should immediately raise concern. An abnormal transfer of hundreds of gigabytes to the Internet deserves investigation even when no files have been encrypted.

Furthermore, many threat actors use file-splitting techniques during exfiltration to remain unnoticed. Data may be transferred over hours or days in small fragments until the complete dataset has been extracted. Once outside the organization, the fragments can be reassembled into the original files.

# Backups: Essential but Not Sufficient

 None of this means that backups have lost their importance. On the contrary, they remain a fundamental component of recovery. The problem arises when recovery is confused with protection.

A backup can restore a database, but it cannot make an attacker forget the copy that was stolen. Nor can it prevent the publication of confidential customer information. Much of its value is also lost if the backup infrastructure itself is compromised during the intrusion.

For this reason, organizations should maintain backups that are isolated, protected through independent credentials, and, whenever possible, protected by immutability mechanisms. What does this mean? Once created, a backup cannot be modified or deleted for a specified period of time, even if an attacker gains privileged access to the environment.

The classic **3-2-1** principle remains highly relevant: Three copies of the data, Stored on two different types of media, With at least one copy kept outside the primary environment. Every organization should continue to treat this principle as a key component of resilience.

# How Should an Organization Prepare?

 There is no silver bullet capable of solving the ransomware problem on its own. Protection against modern ransomware depends on multiple layers of defense working together.

✔️ **Vulnerability Management:** Running a scanner occasionally is not enough. Organizations must identify assets, determine exposure, perform threat modeling, prioritize exploitable vulnerabilities, and verify that remediation efforts have actually been applied, ideally through a retest covering the entire scope assessed.  
✔️ **Phishing-Resistant MFA:** Particularly important for administrative access, VPNs, email platforms, cloud services, and critical systems.  
✔️ **Network Segmentation:** A compromised workstation should not provide an easy path to servers, backups, hypervisors, or administrative infrastructure.  
✔️ **EDR/XDR:** The objective should not be limited to recognizing known malware, but rather to identifying suspicious chains of behavior that may indicate an attack in progress.  
✔️ **Identity Monitoring:** Active Directory, Entra ID, and other identity platforms have become especially valuable targets during intrusions and should be continuously monitored.  
✔️ **Exfiltration Controls:** Large data transfers, connections to unknown destinations, and unusual behaviors should generate actionable alerts for defensive teams.  
✔️ **Protected and Immutable Backups:** A backup that can be accessed using the same compromised credentials can hardly be considered a true last line of defense.  
✔️ **Tested Incident Response:** The day of the attack should not be the first time the organization discovers who has the authority to isolate servers or disconnect services. There is also an additional measure that sometimes receives less attention than it deserves: Testing security from the attacker's perspective.

# Pentesting and Red Teaming Against Modern Ransomware

An automated scan can identify an open port or a vulnerable version. An offensive security exercise answers a very different set of questions, such as:

Can a vulnerability actually be exploited to gain access?  
How far could an attacker move after compromising a workstation?  
Is it possible to reach Active Directory?  
Are administrative credentials exposed?  
Is there a path from the corporate network to backup servers?  
Can the existing controls detect lateral movement?  
Would a compromised account provide access to sensitive information?  
Does network segmentation work in practice, or only on the architecture diagram?

These questions matter because modern ransomware is often the final **consequence of a chain of failures**, not the result of a single vulnerability.

An organization may have antivirus software, firewalls, a SIEM, EDR solutions, and backups in place, yet still maintain a fully viable attack path between a compromised user account and its critical infrastructure. Pentesting helps identify that attack path before an adversary does.

A Red Team exercise can take the assessment even further by evaluating not only technical vulnerabilities, but also detection capabilities, incident response processes, identity security, social engineering resilience, and the Security Operations Center's (SOC) ability to recognize and respond to an intrusion.

# AI vs. AI

 There is, ultimately, an inevitable consequence of this evolution: if attackers can use automation, defenders can too.

The sheer volume of events generated every day within a corporate environment makes it impossible to manually analyze every security signal. AI can help correlate events that may appear unrelated when viewed individually. For example, an unusual authentication attempt may be followed by internal enumeration activity and, minutes later, access to another server.

An account gains elevated privileges and then begins an unusual data transfer. Taken separately, none of these events may be conclusive. Combined, however, they tell a story.

This is perhaps one of the most valuable defensive applications of AI: **reducing the time between detecting an anomaly and making a useful decision.**

However, automation does not mean handing over security entirely to an algorithm. A model can make mistakes. It can generate false positives. It can misinterpret context. It can even become a new attack surface itself. Human teams remain essential for validating findings, conducting investigations, understanding business context, and making critical decisions.

# The Race Is No Longer About Who Has the Best Ransomware

For more than a decade, we have witnessed the economic objective of ransomware evolve. First, attackers held files hostage. Then they targeted entire networks. Data leaks followed. Later came pressure on customers and suppliers, DDoS attacks, and public exposure campaigns.

Now, artificial intelligence is beginning to play a role across multiple stages of the attack lifecycle. We are not necessarily facing an entirely new threat. Instead, we are facing a more efficient version of many threats we already know. That distinction matters. As long as organizations continue building their defenses around the idea of preventing an executable file from encrypting a server, they are likely solving the ransomware problem of ten years ago rather than the one they face today.

The current landscape requires organizations to view identities, endpoints, applications, cloud infrastructure, third-party providers, sensitive information, external exposure, and incident response capabilities as parts of a single interconnected system. The question should no longer be limited to: "Do we have ransomware protection?" A far more challenging and valuable question is: "If someone gained access today, how far could they progress before we noticed?" Answering that question requires more than acquiring security tools. It requires testing controls, identifying vulnerabilities, simulating attacks, reviewing configurations, measuring detection capabilities, and accepting that a credential, an endpoint, or even a trusted supplier may eventually become compromised. Ransomware will continue to evolve. Its name, infrastructure, and tools will change. There may even come a time when some groups abandon encryption entirely.

Yet the underlying business logic remains remarkably consistent: Find what an organization cannot afford to lose and use it as leverage. The best defense begins long before a ransom note appears.

Modern ransomware can no longer be countered solely with protective technologies. Organizations must understand their attack surface, identify vulnerabilities before they are exploited, and assess how far an adversary could advance within their environment.

This has become a critical component of any effective cybersecurity strategy. Security assessments, penetration testing, Red Team exercises, and continuous vulnerability management enable organizations to validate their controls from a realistic adversarial perspective and uncover attack paths that might otherwise remain hidden until an incident occurs. As discussed throughout this article, these activities help identify those paths before an attacker can exploit them.

At Internet Security Auditors, we help organizations translate this approach from theory into practice by identifying weaknesses and testing defenses before a real adversary does.

The best response to ransomware begins long before the first file is encrypted. See you in the next article!

Reference:  
🔗Check Point – Evolution of Ransomware 2025, available at:  [https://www.checkpoint.com/es/cyber-hub/ransomware/evolution-of-ransomware/](https://www.checkpoint.com/es/cyber-hub/ransomware/evolution-of-ransomware/)  
🔗 A Decade of Global Cyberattacks and Where They Left Us, available at:  
[https://www.ibm.com/mx-es/think/insights/decade-global-cyberattacks-where-they-left-us](https://www.ibm.com/mx-es/think/insights/decade-global-cyberattacks-where-they-left-us)  
🔗 Ransomware Surges as Artificial Intelligence Drives More Sophisticated Attacks, available at:  
[https://es.nttdata.com/newsfolder/el-ransomware-se-dispara-y-la-inteligencia-artificial-impulsa-ataques-mas-sofisticados-en-2025](https://es.nttdata.com/newsfolder/el-ransomware-se-dispara-y-la-inteligencia-artificial-impulsa-ataques-mas-sofisticados-en-2025)  
🔗  Why AI is likely to increase ransomware attacks, disponible en:  
[https://www.linkedin.com/pulse/why-ai-likely-increase-ransomware-attacks-david-sehyeon-baek-84obc](https://www.linkedin.com/pulse/why-ai-likely-increase-ransomware-attacks-david-sehyeon-baek-84obc)  
🔗  Ransomware Spotlight: Agenda, disponible en:  
[https://www.trendaisecurity.com/en-gb/resources-insights/deep-research/ransomware-spotlight-agenda](https://www.trendaisecurity.com/en-gb/resources-insights/deep-research/ransomware-spotlight-agenda)  
🔗 INTERPOL - AI linked to more than half of cybercrime in Africa, disponible en:  
[https://www.jurist.org/news/2026/08/interpol-report-finds-ai-linked-to-over-half-of-cybercrime-in-africa/](https://www.jurist.org/news/2026/08/interpol-report-finds-ai-linked-to-over-half-of-cybercrime-in-africa/)  
🔗 SOS Ransomware - Silent Ransom Group, disponible en:  
[https://sosransomware.com/es/grupos-de-ransomware/silent-ransom-group-el-grupo-que-extorsiona-sin-cifrar-ningun-archivo/](https://sosransomware.com/es/grupos-de-ransomware/silent-ransom-group-el-grupo-que-extorsiona-sin-cifrar-ningun-archivo/)

 

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![author-image](https://blog.isecauditors.com/hubfs/egarzon.png)

[Edwin H. Garzón](https://blog.isecauditors.com/en/author/edwin-h-garzón)

eWPTXv2   
 Security Analyst   
 Audit Department

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