Your team member falls victim to a remote download attack. How can you prevent future security breaches?

- Déterminer comment le téléchargement à distance s'est produit (e-mail de phishing, lien malveillant, etc.). - Identifier les vulnérabilités qui ont permis l'attaque (mauvaise configuration, manque de formation, logiciels obsolètes). - S'assurer que tous les systèmes, applications et logiciels sont à jour avec les derniers correctifs de sécurité. - Mettre en place des sauvegardes régulières - Réaliser périodiquement des audits de sécurité internes ou externes - Avoir un PCI / PRI

"Le risque zéro n'existe pas": regardons les mesures de sécurité implémentées: EDR sur le poste ? Droits administrateurs accordés ? Limitation des applicatifs installables ? ces mesures permettent de réduire la vraisemblance. Au delà d'évaluer l'impact potentiel, il faut également chercher à le minimiser pour les prochaines potentielles occurences: travailler sur la segmentation réseau et applicative, renforcer ses mesures de sécurité périmètriques.

I think preventing a future security breach after a remote download attack would require a comprehensive approach to bolster your security posture accordingly. - First you should always assess the incident by understanding how it happened in the first place. Identifying the vulnerabilities that were exploited and any other data that may have been compromised. And then also make sure the attack is contained immediately to prevent more damage, and if need be disconnect from the network.

When such things happen, it usually points to a risk which could, perhaps, have been prevented by a better cooperation between your team and the CISO team. With the increased emphasis on compliance with security standards, a project team may quickly think of cybersecurity standards as some kind of burden on the project. I think of CISO services as services, rather than as a burden. That does require a bit of a mindset change in both teams: rather than waiting for the project team to provide inputs and documentation (e.g. a DPIA or other assessment), CISO team members should think of being much more pro-active and providing inputs themselves. I call that 'CISO as a Service' (CISOaaS).

I don’t think you have time to perform a full risk assessment. Identify the attack vector and see if you are still compromised.

Conducting a risk assessment is your first line of defense against future cyber threats. By identifying critical assets, potential threats, and vulnerabilities, you can pinpoint areas that need immediate attention. Understanding how a team member fell victim to a remote download attack helps you put targeted measures in place, such as enhanced access controls or improved threat detection, which can significantly reduce the likelihood of similar incidents.

Updating your cybersecurity policies post-breach ensures they remain relevant and effective against evolving threats. Clear guidelines on handling suspicious downloads, managing software updates, and reporting incidents can create a culture of security awareness. Regularly reviewing and revising these policies keeps your team aligned with best practices, reducing the chances of another breach.

Parce que la sensibilisation n'est pas la mesure ultime mais reste un vernis obligatoire pour limiter les risques, la mise à jour de la PSSI peut être un moyen de sensibiliser les collaborateurs. Deux approches possibles: - Pédagogie, avec explication des conséquences - Sécurité par la peur, avec sanctions potentielles Des fois, les deux sont nécessaires...

Training programs are essential for equipping your team with the knowledge to recognize and react to cyber threats. By educating team members on signs of remote download attacks, phishing attempts, and safe browsing habits, you build a human firewall that complements your technical defenses. Continuous training reinforces the importance of vigilance and empowers your team to act as the first line of defense.

Au delà de la mise à jour de la PSSI, créer des scénarios ciblés suite à un incident réalisé pour faire comprendre les impacts peut être intéressant. Cibler en revanche des acteurs clefs, ne pas les informer, et les réaliser en mode "campagne de phishing personnalisée".

Technical safeguards such as antivirus software, firewalls, and intrusion detection systems (IDS) provide a crucial layer of protection against cyberattacks. These tools can detect, quarantine, and block malicious downloads before they compromise your system. Regularly updating and configuring these technologies to address new threats ensures your digital defenses remain robust and responsive.

Comme indiqué plus haut, mesure de sécurité technique pour le poste: - EDR - Droits de simple utilisateur - Limitation des executifs mesures de sécurité plus larges: - micro segmentation - EDR / XDR

L'isolation du poste est clef dans ce type d'évènement: la capacité d'isoler automatiquement la machine, via l'EDR, reste la meilleure des pratiques.

An incident response plan prepares your team to act swiftly and effectively in the event of a security breach. This plan outlines the steps to contain the attack, assess its impact, and recover systems. Regular drills and familiarization with the plan help ensure that when a breach occurs, your team is ready to minimize damage and restore normal operations quickly.

Continuous monitoring of your systems is critical for early detection of suspicious activities. Tools that provide real-time insights into network traffic and system behavior enable you to identify irregularities and respond before they escalate into major incidents. Continuous vigilance helps maintain a secure environment and keeps potential threats at bay.

Dicas básicas para evitar futuros ataques de download remoto: - Treinamento: Conscientizar a equipe sobre phishing e downloads suspeitos. - Antivírus e Firewalls: Manter soluções de segurança atualizadas. - Política de Acesso: Restringir downloads e uso de dispositivos não autorizados. - Atualizações: Aplicar patches regularmente nos sistemas e softwares. - Análise de Tráfego: Monitorar acessos e identificar comportamentos anômalos. - Backup Regular: Garantir cópias seguras dos dados para recuperação rápida. show!

Identify the proper controls for your environment. Maintain your baseline. Set up a dashboard to watch your controls. Sporadically test the controls to verify you are not wasting your time. Report to the stakeholders on the progress.