Que faire si la sécurité de votre réseau est compromise par un manque de raisonnement logique ?

Fix the Breach: Identify and address the vulnerability that was exploited. This might involve patching software, updating passwords, or adjusting security settings. Sharpen Security Thinking: Learn from the mistake. Identify the logical flaw that led to the compromise and take steps to improve critical thinking around security decisions. Consider security awareness training for those involved.

If network security is compromised due to a lack of logical reasoning, swift action is imperative. Assess the breach's scope, isolate affected systems, and investigate the root cause. Enhance employee training, bolster access controls, and fortify monitoring systems. Revise security protocols and communicate transparently with stakeholders. This proactive approach mitigates damage, prevents recurrence, and fosters trust in your network security measures.

Find the bare minimum things you are able to run the network on, the rest I would take offline and sandbox them to prevent lateral movement.

Assessing the damage is paramount when responding to a network security breach. By promptly determining the extent of the intrusion—identifying affected systems, accessed data, and ongoing threats—you can formulate an effective response strategy. This involves thorough examination of logs, real-time monitoring of network traffic, and utilization of intrusion detection systems. Similar to diagnosing a patient, understanding the breach's scope is fundamental to implementing appropriate remediation measures.

Containing threats is imperative following a network security breach. By isolating compromised systems, changing passwords, and disabling affected accounts, you halt the spread of the attack and mitigate further damage. This proactive approach, akin to firefighting, creates a protective barrier, allowing you to address the immediate threat while strategizing long-term solutions. Effective containment minimizes the impact of the breach and facilitates focused remediation efforts to restore network integrity.

Sectioning off the assets that are potentially infected is the biggest thing. Find what routers/switches/VM's/DC's you absolutely NEED to make the operation run, everything else should be disconnected. Both ways of doing it are going to be costly and have inevitable downtime. That is why its very important to train end users on spoofed communications.

During a security breach, clear communication is paramount. Notify all stakeholders—including internal teams, management, and potentially affected clients—while balancing transparency with discretion to prevent panic and further exploitation. Provide regular updates on the situation, outlining actions taken and next steps without divulging sensitive details that could aid adversaries. By fostering an atmosphere of trust and collaboration, you can effectively manage the crisis while safeguarding critical information and maintaining security protocols.

Falls back to the Need-to-know basis. Do not give more information then you absolutely need too, leave IP's, hostnames etc out of any written form of communications in the unlikely event emails have been compromised.

After containing the immediate threat, the next step is to eradicate any lingering risks from your network. This involves removing malware, patching vulnerabilities, and updating security protocols to prevent future breaches. Just like weeding a garden, thorough eradication is necessary to ensure the problem doesn't resurface. By meticulously addressing all potential vulnerabilities, you can restore your network's integrity and protect against future threats.

Machine security is just as important as end user security. Stay on top of STIGS, most recent updates to OS's and find what the common exploits are from a CVE database

After eradicating the risks, the next step is to focus on system recovery. This involves restoring data from backups, repairing any damage to systems, and ensuring that operations return to normalcy. Having a robust backup strategy in place beforehand is crucial for a smooth recovery process. While recovery can be a time-consuming endeavor, it's the final step in restoring your network's functionality after a security incident.

Recover the most important assets first, and prioritize off effected domains/users. This will ensure a smoothly running network as things start coming back online.

See where the security breach occurred and start patching or training end users. End users are just as important as keeping on top of the systems securities.

Normalmente se debe tener un plan de respuesta de incidentes, dónde se debe tener una (1) preparación tanto del equipos como de las instalaciones y herramientas a utilizar en el (²) análisis. El equipo debe ser capaz de analizar diferentes sistemas y logs para determinar el grado de penetración y aislar el mismo para activar la fase de (3) insolación y recuperación. Está recuperación dependerá de nuestros sistemas de respaldos. Luego de restaurar los sistemas, debe prepararse un reporte que contenga los indiciones de la brecha, las acciones realizadas y recomendaciones para evitar esta brecha en el futuro.