Antivirus : pourquoi les protections basiques ne suffisent plus

Virus, ransomwares, vols de comptes et espionnage discret n’ont pas disparu en 2025. Bien au contraire.

Portées par l’essor de l’intelligence artificielle, les cyberattaques gagnent en vitesse, crédibilité et automatisation. Les campagnes sont mieux ciblées, plus difficiles à détecter et capables de contourner des défenses pourtant considérées comme « standards ».

Selon l’institut indépendant AV-TEST, plus de 450 000 nouveaux programmes malveillants et applications potentiellement indésirables sont découverts chaque jour. Autrement dit, les solutions de sécurité qui ne se mettent pas à jour en continu laissent très peu de marge d’erreur.

Dans ce contexte, il faut être clair :
👉 Un antivirus gratuit ou les protections intégrées à Windows, macOS ou Android restent utiles, mais montrent rapidement leurs limites face à des menaces modernes capables de passer sous les radars.

Antivirus gratuit vs suite de sécurité complète : la vraie différence

Les protections natives assurent une première ligne de défense. Elles bloquent les menaces connues, mais peinent face à :

• des attaques ciblées,

• des ransomwares évolutifs,

• du phishing sophistiqué,

• des malwares furtifs exploitant le comportement de l’utilisateur.

Pour faire face au niveau de pression actuel, une suite de sécurité complète est devenue indispensable.

Une protection efficace doit inclure :

• 🔍 Détection en temps réel basée sur le comportement

• 🌐 Filtrage web et anti-phishing

• 🔐 Modules anti-ransomware

• 🔥 Pare-feu renforcé

• 🧠 Surveillance des fuites de données

• 🌍 VPN intégré

• 🔑 Gestionnaire de mots de passe

• 👤 Protection de l’identité numérique

L’objectif n’est plus seulement de bloquer un virus, mais de couvrir toute la chaîne de risques, de la simple navigation aux paiements en ligne, avec une protection capable d’évoluer aussi vite que les attaques.

Comment bien choisir son antivirus en 2025 ?

Avant de comparer les marques, il est essentiel d’évaluer les critères suivants :

1. Prise en main

• Ergonomie et clarté de l’interface

• Disponibilité sur PC, Mac et mobile

• Qualité du service client (réactivité, langues, canaux)

2. Modules de défense

• Protection web et e-mails

• Analyse des fichiers et des applications

• Détection proactive et comportementale

3. Performances

• Impact au démarrage du système

• Gestion des ressources

• Rapidité des analyses

• Absence de conflits logiciels

4. Sécurité

• Niveau de détection réel

• Protection en temps réel

• Mises à jour fréquentes des bases virales

• Respect et gestion des données personnelles

5. Fonctions additionnelles

• Contrôle parental

• Protection webcam

• VPN

• Protection de l’identité

6. Prix

• Rapport qualité/prix

• Nombre d’appareils protégés

• Services inclus ou facturés séparément

Classement des meilleurs antivirus en 2025

🏆 Les solutions les mieux notées

• Bitdefender Total Security – ⭐ Meilleur rapport qualité/prix

• Norton 360 Advanced – ⭐ Idéal pour les familles

• Avast One – ⭐ Meilleure version gratuite

• Surfshark One – ⭐ Sécurité polyvalente

• F-Secure TOTAL – ⭐ Simplicité et efficacité

• ESET Smart Security Premium – ⭐ Excellentes performances

• McAfee Total Protection – ⭐ Prise en main intuitive

• G Data Total Security

• Avira Prime

• Malwarebytes Premium

Ces solutions proposent, selon les versions :

• protection multi-appareils,

• applications mobiles (iOS & Android),

• anti-phishing et anti-ransomware,

• VPN, pare-feu, gestionnaire de mots de passe,

• parfois contrôle parental et protection d’identité.

Cas réel : DroidLock, un ransomware Android nouvelle génération

Pour comprendre pourquoi les antivirus mobiles sont devenus indispensables, prenons un exemple concret : DroidLock.

Qu’est-ce que DroidLock ?

DroidLock est un malware Android de type ransomware, découvert par l’équipe zLabs de Zimperium, spécialiste mondial de la sécurité mobile et membre de la Google App Defense Alliance.

Contrairement aux ransomwares classiques, DroidLock ne chiffre pas les fichiers. Il :

• verrouille totalement l’appareil,

• modifie le PIN ou mot de passe,

• affiche des overlays bloquants,

• menace de supprimer les données.

Comment se propage-t-il ?

• 📩 Phishing via sites web malveillants

• 📦 Dropper multi-étapes (APK initial installant le payload)

• 📱 Faux écrans de mise à jour système

Capacités du malware

• Vol de credentials via overlays phishing

• Captures d’écran

• Interception SMS et OTP

• Accès aux contacts et notifications

• Contrôle à distance (VNC)

• Communication avec serveur C2 (15 commandes)

Impact

• Compromission totale de l’appareil

• Risques financiers directs

• Espionnage discret

• Menace réelle pour les entreprises en contexte BYOD

Conclusion : la sécurité n’est plus une option

DroidLock illustre une réalité inquiétante : les menaces mobiles deviennent aussi sophistiquées que celles ciblant les ordinateurs.

Même si certaines campagnes visent aujourd’hui des zones spécifiques (utilisateurs hispanophones, Android), leur potentiel d’expansion est élevé.

Les bonnes pratiques restent essentielles :

• éviter les sources non officielles,

• limiter les permissions sensibles,

• activer Google Play Protect,

• utiliser une solution antivirus complète et à jour.

👉 Pour les entreprises, la question du BYOD est désormais critique : un seul appareil personnel compromis peut devenir une porte d’entrée majeure vers le système d’information.

En 2026, un antivirus n’est plus un simple logiciel.
C’est un pilier stratégique de votre hygiène numérique.

Vous vous demandez si votre protection est réellement adaptée à votre activité ?
👉 Parlons-en avant qu’un incident ne le fasse à votre place.

4 reasons forensics will remain a pillar of cyber security

Artificial intelligence (AI), security orchestration and the Internet of Things (IoT) are disrupting our industry. Some bombastic pundits are even predicting a Jetsons-like world where computers and IoT devices replace workers with machines. Yet most futurists believe computing will only evolve to the level of a digital assistant. Tasks, they say, will be split between artificial and biologic intelligence. Forensics is a prime example of a human compliment to both AI and security automation.

Here are some reasons Digital Forensics and Incident Response (DFIR) will stay relevant in this world of intelligent devices and software that “thinks.”

1. Alerts produced by AI may actually increase incident response workload

Artificial intelligence is making threat detection better. Yet AI has two downsides which will keep responders busy. The first is higher rates of false positives in detecting malware.

At the risk of oversimplifying, many AI approaches are closer to human intelligence because they think statistically. So far, AI trained with the prejudices ingrained in the data they’re modeled against, have produced high false positives. Chief data scientists at major vendors admit misfiring at rates of 20%. Filters and traditional signature detection are often mixed in to alleviate the burden on the user. Yet excessively sensitive detection is why many AV 2.0 vendors include investigative capabilities allowing humans to vet their conclusions.

AI also passes limited information about the malware it detects, leaving forensics to fill in the rest. The traditional approach of discovering malware was through reverse engineering, or by monitoring it inside sandboxes. These both produced detailed reports of behavior, capabilities and other threat intelligence. Conversely, some AI based approaches only report that a threat was flagged by, “XYZ Threat Model.” Automatically flagging things on the wrong side of a machine learning statistical curve is a powerful approach. Yet it isn’t too helpful for those investigating incidents.

2. Orchestration and automation won’t replace forensic practitioners

When I talk friends with more than a decade in forensics, they often bemoan the lack of deep knowledge in today’s practitioner. The influx of new professionals does mainly Tier 1 work: light triage, log file examination and replaying “flight recorder” style continuous monitoring. They barely tap into forensic artifacts, and couldn’t do reverse engineering, or carve encryption keys from RAM during a ransomware case. For these things you need to hire the few remaining Tier 3 DFIR practitioners.

The new Security Orchestration Automation and Response (SOAR) products, typified by Demisto and Phantom, automate incident response and the usage of forensic tools through playbooks. This could reduce the size of incident response teams, but will it commoditize forensic tools and skills?

Most would agree that organizations are barely digging into the forensic toolbox and that important alerts still aren’t being given enough attention. SOAR opens the door to finally employ the proper variety and depth of forensics via automation. What I’ve seen so far in SOAR rollouts is their use as a forensics force multiplier.

3. IoT, mobile and cloud don’t change the fundamental issue

Sometimes I hear people predict that all traditional computing devices will transition into the cloud, mobile and IoT. Their next statement is usually that InfoSec departments and incident response activities will disappear too; taken over by cloud service providers, or mobile and IoT device vendors.

While access to the servers behind SaaS and access into IoT devices make things a little tougher for hackers and forensics, that’s missing the point. Your biggest security hole is your user who clicks phishing emails, browses scary websites and inserts sketchy USB devices they pick up in the parking lot.

In the far-off future I don’t know what tablet, kiosk or Elon Musk brain chip employees with be interfacing with. I do know that they will drag them into the dark corners of the internet and infect them with malicious code. Then they’re going to connect to your cloud-based CRM or proprietary source code repository. This is human nature and it’s not going away. Neither is the job investigating the people and devices connecting to your valuable assets.

4. There’s always a new detection approach…and sophisticated actors bypassing it

State funded cyber warfare and opportunities to pillage digital banking pull bright minds to the dark side. The same quality of talent working at security vendors and InfoSec departments now work to develop exploits and malware. Sometimes it’s the same people doing both!

Cybersecurity is a human arms race. Sure, AI is supplementing security analysts, but AI is now deployed by humans on both side of the war. AI-powered hacking tools that learn to bypass AI detection were released at last year’s hacker conference, DefCon. The parity between each side is why, despite security breakthroughs, new attacks will always appear and succeed.

After the onslaught of AI-based attacks pierce our defenses, DFIR will need to be employed to reduce hacker dwell time, as it always has. When protection fails, forensics can still prevail.

Have You Heard About Tor?

TOR: the Internet “anonymizer.”

For most of us what is personally important while using the Internet, is to have the best of:

• Speed
• Security
• Access
• Privacy

But there’s no such thing as the average person on the Internet; we’re all likely to have different priorities for different reasons.

• As Internet users, we are as different as out personalities, work and personal responsibilities.
• We also use the Internet different from each other based on our interests, obsessions, political affiliations and hobbies.

When privacy comes out on top.

However, there are many people who use the Internet and who definitely do not want to be identified by name on the Internet, at least when they are doing certain activities if not all the time. They would like to stay anonymous, as often as they can, online.

• This isn’t simply a matter of not identifying themselves: they don’t want anyone to be able to track them down and find out who they are.
• They also want to visit any type of website they want without anybody knowing about it and stopping them…no matter the content, whether it borders on being illegal or is even outright illegal.
• They also want to say what they want, even if it’s not popular or raises concerns…and they don’t want to be put under surveillance, monitored, arrested or worse. (After all, freedom of expression changes depending on what country you’re in.)
• Finally, they believe—with conviction, that we could be tracked down and identified very easily with the way the Internet and Web work today.

That’s where the very special Internet network known as Tor comes in for this crowd.

What is Tor?

As explained in the picture, Tor is a service that redirects Internet traffic through a special network which helps someone stay unidentifiable and unidentified online. Tor exists to keep an Internet user’s name and identity out of Internet activity (some or all) that they don’t want their true name and actual identity attached to.

Because, sometimes people simply want to communicate online, post messages and view websites in private, but are afraid to. That’s what Tor does, when the goal of these people is not to harm others.

What does Tor stand for?

Tor stands for The Onion Router, and it’s never spelled TOR or T.O.R., just so you know. It’s simply Tor.

Tor was developed in the mid 1990s by some computer scientists and a mathematician while working for the United States Naval Research Laboratory. They were tasked with coming up with a way to protect their Navy’s online intelligence communications.

Obviously, their goal wasn’t simply staying anonymous. They wanted to prevent others (an individual, organization or foreign country) from stealing and deciphering the Navy’s communications.

Tor made available to the public.

In the ensuing years, Tor transformed from a special network for sending secure military communications to a network that was open to the world at large. An Internet inside the Internet, so to speak.

This happened with the creation of The Tor Project, which was developed between 2002-2005, and founded by some of the original creators. However, by then there were several organizations who recognized that Tor offered something special—the ability for anyone in the world to use the Internet and send messages and email anonymously.

Tor became a beacon for privacy and free speech advocates.

Where does the “onion” idea come in?

If you’ve ever peeled apart an onion, you know it comes apart in layers. The computer engineers who created Tor chose a method that added layers of encryption over data that was going across a network.

Along with that, they ingeniously created special stops along the network, called relays, where a layer of encryption is pulled off, but just enough to get information the next relay destination. When the encrypted message arrives at the subsequent relay, the same thing happens—another layer is stripped and the message is moved on.

By the time the data reaches its destination, the last layer is peeled away and the information can be read. But everywhere along the way, nobody could see the data that was being transmitted. Not the contents and definitely not the IP address of the sender, which (if the person worked from one primarily locations) would identify where they were.

That also means if there were an intruder or hacker along the network, they wouldn’t be able to know who the sender was.

Tor today.

Today, Tor is vibrant and growing in popularity, and controversy. Tor is free, just like the Internet, and it moves Internet traffic from millions of users across a network of volunteer relays, numbering in the thousands.

However, as you start to look into Tor, be prepared. Because as you might expect, that level of freedom, which can be used for all the right reasons, is also abused by many people on the Internet…significantly…and for all the wrong reasons.

It all depends on what your perspective is on freedom of expression.