What Is Ransomware? A Complete Guide for Organizations

Ransomware is a type of malware that threat actors use to lock you out of your own files, then demand payment before you get them back. The hallmark of ransomware is the conspicuous ransom note that appears on victims’ computer screens, indicating files have been encrypted and demanding payment for their release.

This malicious software encrypts critical data, making it inaccessible until victims pay a ransom. The increasing frequency and sophistication of ransomware attacks have made them a top concern for businesses across all sectors.

The numbers are alarmingly stark. According to Illumio's Global Cost of Ransomware Study, 88% of organizations faced at least one ransomware attack in the past year, and 58% were forced to halt operations during an attack. Only 13% of victims fully recovered all encrypted data.

Today's ransomware doesn't stop at encrypting data for ransom. Modern strains steal your data first, then threaten to leak it if you refuse to pay. The evolution from simple encryption to double extortion has turned a data recovery problem into a reputational and legal one as well.

Ce guide vise à fournir une compréhension complète des ransomwares, des risques associés, des stratégies efficaces de prévention et d'atténuation, ainsi que des questions fréquemment posées pour une meilleure compréhension.

Évolution des rançongiciels

Ransomware has evolved significantly since its inception. Early attacks were relatively simple, often relying on basic encryption methods and rudimentary distribution techniques. Over time, ransomware has become more sophisticated. Alongside double extortion, the ransomware threat has also been shaped by ransomware-as-a-service (RaaS). RaaS allows cybercriminals to lease ransomware tools, lowering the barrier to entry and enabling even those with limited technical skills to launch attacks.

What Are the Key Types of Ransomware?

Ransomware threats have become incredibly dynamic, and not all attacks work the same way. Knowing the differences matters because your organization’s containment strategy has to match the type of attack you're facing. Here are the main variants you'll encounter.

• Ransomware crypto : Chiffre des fichiers précieux, les rendant inaccessibles sans la clé de déchiffrement.
• Ransomware de casier: Bloque complètement l’accès aux utilisateurs de leurs appareils, empêchant toute interaction tant que la rançon n’est pas payée.
• Double extorsion: Les attaquants non seulement chiffrent les données, mais les exfiltrent également, menaçant de rendre publiques des informations sensibles si la rançon n’est pas payée.
• Leakware/Doxware : Semblable à la double extorsion, mais avec un accent principal sur la menace de divulguer des informations confidentielles pour contraindre les victimes à payer.
• Triple Extortion: This tactic builds upon double extortion by adding a third pressure point. That pressure point is often a distributed denial-of-service (DDoS) attack or direct outreach to your customers or partners, both meant to push you into paying.
• Ransomware-as-a-Service (RaaS): A criminal business model where ransomware developers provide ready-made kits to affiliates, who launch the actual attacks and share the ransom with the developers. 

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What Are Common Methods of Delivery?

Ransomware rarely penetrates perimeter-based defenses by force. Instead, it slips through gaps you didn't know existed. Here's how attackers most commonly get in:

• Emails de phishing : Des emails malveillants qui trompent les destinataires en les forçant à cliquer sur des liens infectés ou à télécharger des pièces jointes nuisibles.
• Exploits du protocole de bureau à distance (RDP) : Les attaquants exploitent des identifiants RDP faibles ou compromis pour accéder sans autorisation aux systèmes.
• Vulnérabilités des logiciels : Les logiciels non corrigés ou obsolètes peuvent servir de points d'entrée pour les ransomwares, permettant aux attaquants d'exploiter les vulnérabilités connues.
• Malvertising: Malicious code hidden in online ads redirects victims to pages that deliver ransomware or the malware that loads it, sometimes without a click.
• Supply Chain and Vendor Compromise: Attackers breach a trusted software vendor, managed service provider, or third-party integration, then use that trusted access to push ransomware to the provider’s downstream customers.
• Stolen or Brute-Forced Credentials: Valid usernames and passwords, often bought from initial access brokers, harvested by infostealer malware, or guessed through brute-force attacks, let attackers walk in the front door without needing an exploit at all.

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Qu'est-ce que le risque de ransomware ?

Le risque lié aux ransomwares désigne la menace potentielle que représentent les attaques de ransomwares pour la cybersécurité et les opérations commerciales d'une organisation. Elle englobe la probabilité qu'une attaque se produise et l'impact potentiel sur les données, les finances et la réputation de l'organisation.

Différencier les menaces, les vulnérabilités et les risques

• Menaces : Actions malveillantes potentielles, telles que les attaques de ransomware, qui peuvent exploiter les vulnérabilités.
• Vulnérabilités : Faiblesses ou lacunes dans les mesures de sécurité qui peuvent être exploitées par des menaces.
• Risque : L’intersection des menaces et des vulnérabilités, représentant le potentiel de perte ou de dommage.

Understanding these entry points is crucial for effective risk assessment and vulnerability management. “The danger is that by the time ransomware is detected, it could have spread significantly, and it then takes a long time to resolve,” warns Trevor Dearing, technical director of critical infrastructure solutions at Illumio. “We need to mix the detection with an amount of prevention and protection in the front end,” he adds.

Le rôle de l'évaluation des risques dans la gestion de l'exposition aux ransomwares

L'évaluation des risques consiste à identifier et à évaluer les menaces et les vulnérabilités potentielles afin de déterminer leur impact sur l'organisation. En procédant à des évaluations régulières des risques, les organisations peuvent prioriser les ressources, mettre en œuvre des mesures de sécurité appropriées et réduire leur exposition aux attaques de ransomware.

Many security teams use the NIST Cybersecurity Framework, an established model that provides a repeatable structure for managing cyber risk, including identifying new exposures as your environment changes, rather than relying on a single audit. Scoring individual workloads by exposure level also helps, turning an ambiguous sense of risk into a concrete list of which systems need protection first.

Pourquoi la gestion des risques liés aux rançongiciels est-elle importante ?

Ransomware risk management is an ongoing discipline, and the cost of neglecting it keeps climbing. Effective ransomware risk management is vital for several reasons:

• Impact opérationnel : Les attaques de ransomware peuvent interrompre les activités de l'entreprise, entraînant des temps d'arrêt importants et des pertes de productivité.
• Perte de données : les données cryptées ou volées peuvent entraîner la perte définitive d'informations essentielles.
• Pertes financières : les coûts associés au paiement des rançons, aux efforts de récupération et aux amendes réglementaires potentielles peuvent être considérables.
• Dommages à la réputation : Les attaques médiatisées peuvent éroder la confiance des clients et nuire à la marque de l’organisation.

It's seldom that these risks manifest in isolation, as a single attack typically triggers operational downtime, data loss, financial cost, and reputational damage all at once. This is why risk management assesses these impacts together rather than one at a time.

Illumio's research found that only 27% of organizations have implemented a segmentation solution, despite it being one of the most effective controls for stopping an attack from reaching critical systems. As Dearing put it, “Organizations need operational resilience and controls like microsegmentation that stop attackers from reaching critical systems. By containing attacks at the point of entry, organizations can protect critical systems and data, and save millions in downtime, lost business, and reputational damage.”

Implications réglementaires et exigences de conformité

Beyond the immediate damage to your systems and bottom line, a ransomware incident increasingly triggers legal and regulatory obligations with their own strict deadlines. Organizations must adhere to various regulations that mandate the protection of sensitive data:

• HIPAA : Les organismes de soins de santé sont tenus de protéger les informations relatives aux patients.
• RGPD: Mandates data protection and privacy for individuals within the European Union.
• SEC Rules: Require public companies to disclose material cybersecurity risks and incidents.

The SEC rule deserves dedicated attention because its obligations don’t end once an incident looks resolved. A ransomware payment doesn't relieve a public company of the obligation to file a Form 8-K within four business days after determining the incident is material, so compliance work and technical recovery now move on parallel timelines. Non-compliance can result in hefty fines and legal consequences.

Limites de la couverture de l'assurance cybernétique et du risque de ransomware

While cyber insurance can provide financial support following an attack, policies often have limitations and exclusions. More than 40% of cyber insurance claims filed in 2024 and 2025 were denied, most often because required security controls were missing or the policyholder had misrepresented them.

Insurers are also adding ransomware-specific sub-limits and co-insurance clauses, which force you to absorb a larger share of the loss even when your policy is technically in force. Relying on insurance without strong security controls can leave organizations exposed, since those controls often determine whether a claim pays at all.

Statistiques et tendances dans le monde réel

The numbers tell a more transparent story than any narrative could.

• 76% of organizations experienced a ransomware attack in the last two years. (CrowdStrike)
• 70% of ransomware incidents result in several days of business disruption. (Statista)
  The average total cost to recover from a ransomware attack is $5.2 million. (PurpleSec)
• 88% of organizations were hit by at least one ransomware attack in the past year, and it took an average of 17.5 people working 132 hours to contain and remediate the largest incident they faced. (Illumio)

Ces statistiques soulignent le besoin critique d'une gestion proactive des risques.

How Does Ransomware Work? The Attack Lifecycle

Ransomware attacks unfold across several distinct stages. Each phase creates a window to detect and contain the threat before it reaches your most valuable systems.

Initial Access

Threat actors initiate ransomware attacks via phishing campaigns, stolen credentials, and unpatched vulnerabilities. This point of breach is often a single compromised laptop or exposed remote access tool, and the intrusion can remain undetected for days while the attacker studies your environment.

Establishment and Persistence

After breaching your environment, attackers establish backdoors and create new accounts to keep access if their current credentials stop working. During this phase, they also disable and tamper with security tools to derail detection and carry out their campaign. With defenses weakened, attackers can move deeper without tripping alerts.

Reconnaissance and Lateral Movement

Attackers map your network to find high-value systems, then move laterally through every system to reach your most critical servers. A flat, non-segmented environment lets attackers move from a single compromised workstation to the entire server infrastructure within a few hours.

Privilege Escalation

Attackers search for administrator credentials or find misconfigured access points to expand their scope of control. Backup systems are a prime target because disabling them limits a victim's ability to restore without paying.

Data Exfiltration

Sensitive information is transferred out of your environment to servers under the attacker's control. Attackers use the stolen data as a bargaining chip for double extortion, and they take it before any files are encrypted. Data exfiltration often goes undetected. Outbound traffic from the environment may appear to be normal business operations as opposed to being evidence of an ongoing theft.

Deployment and Encryption

In most attacks, the ransomware payload is triggered across every reachable system at once, locking files and delivering the ransom note. The timing of the phase is deliberate, often striking during nights, weekends, or holidays when security teams run thin.

Extortion

Once your systems are encrypted, attackers demand payment, often threatening to leak the stolen data if you refuse. Many escalate by contacting your customers or the media directly, adding public pressure that raises the reputational and financial stakes.

Avantages d'une gestion proactive des risques liés aux rançongiciels

Changing how you approach the problem makes all the difference. Rather than responding after a ransomware attack spreads, you limit what an attack can reach before one ever starts. Implementing proactive ransomware risk management strategies offers numerous benefits:

• Continuité des activités et reprise plus rapide : Veille à ce que les opérations puissent reprendre rapidement après une attaque, en minimisant les temps d'arrêt.
• Renforcement de la cybersécurité: Renforce les défenses de l'organisation contre les ransomwares, mais aussi contre d'autres cybermenaces.
• Réduction des dommages financiers et des atteintes à la réputation : Atténue les coûts potentiels et la publicité négative associés aux attaques.
• Amélioration de la confiance des parties prenantes et des clients : Démontre un engagement en faveur de la sécurité, ce qui favorise la confiance des clients et des partenaires.

A Forrester Total Economic Impact study commissioned by Illumio put real numbers behind these benefits. For a composite organization based on interviewed Illumio customers, Illumio Segmentation reduced the blast radius of a breach by 66%, saved $3.8 million by limiting unplanned downtime, and delivered a 111% return on investment over three years, paying for itself in six months. Figures like these give you a concrete way to justify proactive investment to leadership, rather than presenting downtime and reputational risk in abstract terms.

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Comment identifier et évaluer les risques liés aux ransomwares ?

L'identification et l'évaluation efficaces des risques liés aux ransomwares constituent une étape essentielle dans la protection de votre organisation contre les attaques potentielles. Ce processus implique de comprendre les menaces potentielles, d'évaluer les vulnérabilités et de déterminer l'impact potentiel sur vos activités.

Méthodes d'identification des risques

• Modélisation des menaces : Cela consiste à anticiper les vecteurs d’attaque potentiels en analysant comment un ransomware pourrait infiltrer vos systèmes. En comprenant les tactiques, techniques et procédures (TTP) employées par les cybercriminels, les organisations peuvent mieux préparer leurs défenses.
• Analyse des vulnérabilités : Scanner régulièrement les systèmes et réseaux à la recherche de vulnérabilités connues aide à identifier les faiblesses que les ransomwares pourraient exploiter. Les outils automatisés peuvent aider à détecter des logiciels obsolètes, des mauvaises configurations et d’autres failles de sécurité.
• Inventaires d’actifs : Maintenir un inventaire complet de tous les matériels et logiciels garantit que tous les points d’entrée potentiels sont pris en compte et protégés. Cela inclut la compréhension de la critique de chaque actif afin de prioriser efficacement les mesures de sécurité.

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Cadres d'évaluation des risques

Using established frameworks provides a structured approach to assessing ransomware risk:

• Cadre de cybersécurité du NIST (CSF) : Offre des lignes directrices pour l'identification, la protection, la détection, la réponse et la récupération des cybermenaces, y compris les ransomwares.
• Factor Analysis of Information Risk (FAIR): Provides a quantitative approach to understanding and measuring information risk, enabling organizations to make well-informed decisions.
  ISO/IEC 27005: Focuses on information security risk management, offering guidelines for a systematic approach to managing risks associated with information systems.

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Outils et techniques

La mise en œuvre des bons outils améliore la capacité à détecter les menaces de ransomware et à y répondre :

• Systèmes de gestion des informations et des événements de sécurité (SIEM) : Agréger et analyser l'activité des différentes ressources de votre infrastructure informatique afin de détecter les comportements suspects.
• Flux de renseignements sur les menaces : Fournissent des informations en temps réel sur les menaces émergentes, ce qui permet aux entreprises de mettre à jour leurs défenses de manière proactive.
• Détection et réponse des points d’extrémité (EDR) : Surveille les appareils des utilisateurs finaux pour détecter et répondre aux menaces cybernétiques telles que les ransomwares.

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Priorité aux cibles de grande valeur et aux systèmes critiques

Il est essentiel d'identifier et de hiérarchiser la protection des biens de grande valeur et des systèmes critiques. Il s'agit d'évaluer l'impact potentiel d'une attaque de ransomware sur ces actifs et de mettre en œuvre des mesures de sécurité renforcées en conséquence.

Examples of Ransomware Variants

Ransomware families evolve fast, and tracking a few notable examples helps you recognize the patterns behind the headlines. Here are three variants that each represent a different stage in how ransomware has grown more sophisticated.

• WannaCry: This self-replicating "cryptoworm" used a leaked NSA exploit tool named EternalBlue to infect around 200,000 systems in approximately 150 countries within days. Launched in 2017, WannaCry remains one of the largest ransomware attacks on record, with estimated global losses in the billions, and showed how a single unpatched flaw could turn a ransomware infection into a worldwide event.
• LockBit: Launched in 2019 as a ransomware-as-a-service, LockBit built a large affiliate network in which attackers used its software in exchange for a share of the profits. LockBit has released many versions of its ransomware, and researchers identified a 2025 release as more aggressive than earlier ones. LockBit's success helped make RaaS the standard operating model for modern ransomware. For related reading, see our post on containing LockBit ransomware.
• Qilin: Qilin is currently one of the most active ransomware families, with victim numbers rising sharply year over year. Like other contemporary ransomware, Qilin has a version written in Rust, a language that makes it harder for traditional security tools to analyze and detect. Qilin attackers also use “bring your own vulnerable driver” techniques to disable more than 300 endpoint detection and response tools, showing how attackers design malware specifically to shut down existing defenses.

Illumio’s Global Cost of Ransomware Study found that, among respondents forced to shut down operations, average downtime lasted 12 hours. Pete Finalle, research manager at IDC, advises, "Securing the perimeter is no longer sufficient for guaranteeing continued business operations, and organizations that prioritize containment are best positioned to minimize impact."

Stratégies de prévention et d'atténuation des ransomwares

Implementing comprehensive prevention and mitigation strategies is crucial in defending against ransomware attacks. Layering them together is what shrinks the attack surface that threat actors rely on to move from a single infected device to your entire environment.

Formation à la sensibilisation à la sécurité et simulations d'hameçonnage

Educating employees about the dangers of phishing and social engineering tactics reduces the risk of ransomware infiltration. Regular simulations help reinforce training and identify areas needing improvement. One 2025 industry report tracking global phishing simulation data found that click rates dropped by 86% after 12 months of ongoing training, compared with 40% after three months, suggesting that sustained reinforcement drives lasting behavior change.

Détection et réponse des points finaux (EDR)

Deploying EDR solutions enables continuous monitoring of endpoints to detect and respond to threats swiftly, minimizing potential damage. The speed of that response matters as much as the detection itself. The time between initial infection and containment often determines whether an attack stays confined to one machine or spreads across your network. Today's EDR platforms are designed to flag ransomware behavior within minutes rather than hours, provided attackers haven’t disabled them first.

Segmentation du réseau et contrôles d'accès (confiance zéro)

Implementing network segmentation limits the spread of ransomware by isolating critical systems. Adopting a Zero Trust model ensures that all users and devices are authenticated and authorized before accessing resources. Because most ransomware depends on moving freely between systems once it lands, network segmentation is frequently the single control that decides whether an incident stays contained or escalates into a full network shutdown.

Authentification multifactorielle (MFA) partout

Enforcing MFA adds an extra layer of security, making it more difficult for attackers to gain unauthorized access, even if credentials are compromised. Research backs this up: Microsoft estimates that MFA can block more than 99% of account compromise attempts. 

Sauvegardes sécurisées et stockage immuable

Regularly backing up data and utilizing immutable storage solutions ensure that data can be restored without capitulating to ransom demands. Backup systems are now a primary target, not just a fallback plan. In the financial sector, backup repositories are targeted in roughly 9 out of 10 ransomware attacks. When backups survive, organizations can restore data without depending on the attackers.

Gestion des correctifs et des vulnérabilités

Timely application of security patches and continuous vulnerability management reduce the risk of exploitation by ransomware. Over half of ransomware attacks in 2026 were projected to exploit unpatched or poorly patched systems, with internet-facing applications, VPNs, and cloud assets among the top targets. 

Filtrage du courrier électronique et du web

Implementing robust filtering solutions helps block malicious emails and websites, reducing the likelihood of ransomware delivery. Email remains one of the most common ransomware delivery channels. Proper filtering that blocks malicious attachments and links before they reach an inbox removes a large share of that risk before any employee has to make the right call under pressure.

Plans de réponse aux incidents et de récupération

Having a well-defined incident response plan is vital for minimizing the impact of a ransomware attack. Speed is crucial, since every hour without a clear next step gives the attacker more room to spread the ransomware.

Élaborer un plan d'intervention en cas d'incident lié à un ransomware

Developing a comprehensive plan that outlines procedures for detecting, containing, eradicating, and recovering from ransomware incidents ensures a structured and efficient response. This plan works best as a living document, tested and updated regularly.

Rôles et responsabilités clés lors d'une attaque par ransomware

Clearly defining roles and responsibilities ensures that all team members understand their tasks during an incident, facilitating a coordinated response. Your plan should extend beyond IT to include legal, communications, and executive leadership, since a ransomware incident rarely stays a purely technical problem for long.

Mesures à prendre après la détection d'un ransomware

• Contenir : Isoler les systèmes affectés pour empêcher la propagation du ransomware.
• Éradiquer : Supprimez le ransomware de tous les systèmes infectés.
• Récupérer : Restaurer les données à partir des sauvegardes et vérifier l'intégrité des systèmes.
• Communiquer : Informez les parties prenantes, y compris les employés, les clients et les organismes de réglementation, le cas échéant.

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Considérations juridiques et relatives à l'application de la loi

Engaging legal counsel and reporting incidents to law enforcement agencies can provide guidance on compliance and potential investigative support. Early engagement here also helps clarify whether paying the ransom carries any legal risk in your jurisdiction.

Examen post-incident et planification de l'amélioration

Conducting a thorough post-incident analysis helps identify lessons learned and areas for improvement, strengthening future defenses. These findings are most useful when they feed directly back into the response plan itself, closing the loop for next time.

Comment mettre en œuvre un programme efficace de gestion des risques liés aux ransomwares ?

L'élaboration d'un programme complet de gestion des risques liés aux ransomwares implique des efforts coordonnés entre les différentes facettes de l'organisation.

Construire l'alignement interne : Les équipes informatiques, juridiques, de gestion des risques et de direction

La mise en place d'une équipe interfonctionnelle garantit que tous les aspects du risque de ransomware sont pris en compte. Une communication régulière entre les services informatiques, juridiques, de gestion des risques et la direction générale favorise une approche unifiée de la cybersécurité.

Choisir les bons cadres et outils

Selecting appropriate cybersecurity frameworks, such as NIST CSF or ISO 27001, provides structured guidance. Implementing tools like Security Information and Event Management (SIEM) systems and Endpoint Detection and Response (EDR) solutions enhances threat detection and response capabilities.

Budgétisation de la gestion des risques liés aux ransomwares

Il est essentiel d'allouer des ressources suffisantes aux mesures de cybersécurité, à la formation des employés et à la planification des interventions en cas d'incident. Les investissements dans des mesures préventives peuvent conduire à des économies significatives en évitant des dépenses potentielles liées à des attaques.

Intégrer la réponse aux ransomwares dans une stratégie plus large de cybersécurité

Veiller à ce que les plans de réponse aux ransomwares fassent partie de la stratégie globale de cybersécurité favorise un mécanisme de défense cohérent. Des mises à jour et des exercices réguliers permettent à l'organisation de se préparer à l'évolution des menaces.

How Illumio Combats Ransomware Attacks

At Illumio, we’ve seen firsthand how segmentation can dramatically reduce ransomware risk. When you limit an attacker’s ability to move laterally, you contain ransomware before it can reach critical systems.

Check out Illumio’s Segmentation Solution. To learn more about stopping ransomware from spreading, explore the Ransomware Containment Solution page.

Foire aux questions (FAQ) sur les ransomwares

1. How can we test if we're truly prepared against ransomware?

The most accurate way to test whether you are prepared for a ransomware attack is through tabletop exercises or ransomware simulations. Run these simulations more than once a year, and include all necessary groups, such as IT, legal, communications, and executive leadership. Key areas to track include how quickly the team identifies, contains, and communicates during the simulation. Use the weaknesses you identified to strengthen your response before a real attack happens.

2. Quels sont les secteurs les plus exposés ?

All industries are susceptible to ransomware attacks; however, healthcare, energy, and financial services are targeted frequently because they hold highly sensitive data and can’t afford downtime. Attackers know a shutdown in these sectors creates urgency to pay, and strict regulatory requirements can add to that pressure.

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3. What's the best ransomware prevention tool?

There’s no universal tool that prevents ransomware on its own. Strong defense comes from combining several layers, including endpoint detection and response, SIEM monitoring, microsegmentation, and reliable backups. Microsegmentation stands out because it limits how far an attacker can move once inside, giving you containment even if another layer fails first.

4. L'assurance cybernétique peut-elle aider à lutter contre les ransomwares ?

Cyber Insurance may help absorb the financial costs of recovering from a ransomware incident. It typically covers costs associated with recovery, legal expenses, and potentially the cost of the ransom paid. However, cyber insurance policies contain exclusions, sub-limits, and stringent security requirements. Therefore, treat cyber insurance as a secondary financial resource designed to work alongside robust prevention and containment methods, rather than a replacement.

5. À quelle fréquence devrions-nous mettre à jour nos protocoles de sécurité ?

You should perform a formal review of your security protocols at least annually, with some situations prompting more immediate audits. A review should also occur immediately upon significant infrastructure changes, acquisitions, or new threat intelligence. Because ransomware evolves rapidly, outdated protocols leave gaps that attackers can exploit.

6. Qu'est-ce que la double extorsion dans les attaques de ransomware ?

Double extortion is a type of ransomware attack in which attackers steal a copy of your data and then encrypt your files. The attackers then use this duplicate copy of your data to coerce payment by threatening to either publish or sell this stolen information. Beyond the pressure to pay to unlock your files, the threat of reputational damage and compliance liability increases the total cost of the attack.

7. How does zero trust architecture help in ransomware prevention?

Zero trust architecture is based on the assumption that no user or device should be considered trustworthy by default, even if located inside your internal network. All requests for access to systems and applications are validated prior to authorization.  Against ransomware, zero trust restricts the movement of attackers across the internal network via segmentation and validation of all access. So while an attacker may successfully gain access to one part of your internal network, zero trust limits their ability to reach the rest of your systems.

8. Quel rôle la formation des employés joue-t-elle dans la prévention des ransomwares ?

Employee education and training is one of the first lines of defense against ransomware. Employees remain a primary target of phishing, one of the most common ways ransomware gets into an organization. Repeatedly educating employees about identifying malicious email links and attachments reduces the likelihood of an employee inadvertently introducing a piece of malware onto your company’s internal networks.

9. Quelle est l'importance des sauvegardes dans la défense contre les ransomwares ?

Backups are one of the most valuable tools against ransomware because they let you recover without paying the ransom. They only work if kept secure, tested regularly, and ideally stored in an immutable format attackers can't alter or delete. Untested or unprotected backups can fail you exactly when you need them most.

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