¿Cómo maneja los incidentes complejos?

As part of your incident readiness program, aim to have a set of clearly defined severity levels established. These will take scope into account, among other factors like the criticality of the affected service. Attributing a severity level to your incident early on is important, as it sets the tone for the response, but this should be a quick decision based on pre-existing standards. Otherwise, you risk wasting valuable response time by determining (and often, debating) the severity of the problem.

Once defined, communicating this is key for stakeholder buy-in. Producing Incident summaries that focus on business impact and risk helps wider audiences engage appropriately with the Incident Response process.

Defining the scope during a cyber incident response is crucial to ensure that resources are appropriately allocated, and the incident is contained and resolved effectively. Scope can be defined only if you have a through understanding of the incident. Need of identifying the assets and the impact of the incident is required. Clearly define the objectives and establish boundaries for the incident response effort. Keeping these points in mind, one can effectively define the scope of their incident response efforts and mitigate the impact of cyber incidents.

When faced with complex incidents, start by clearly defining the scope of the problem. In a cybersecurity incident, outlining the affected systems, data, and potential impact allowed my team to grasp the magnitude of the situation and plan a targeted response.

Der Zeitplan richtet sich anhand forensischer Fragestellungen und des Verlauf bis zum stabilen Notbetrieb beim Kunden aus. Die einzelnen Themenbereiche (Krisenmanagement, Kommunikation, ITForensik, etc.) werden in der Zeit unterschiedlich stark gefordert.

How the incident unfolded, identifying the root cause, and effectively responding to it can be done by establishing the timeline. Tools, techniques and frameworks such as MITRE are helpful for having a clear visibility about the sequence of the cyber incident.

Reconstruct the sequence of events using event logs, timestamps, audit trails, and malware analysis to map out actions and changes pre-, during, and post-attack. This detailed timeline reveals the attackers' tactics and techniques, clarifies the root cause and impact, and highlights gaps in detection and response. By understanding the incident’s evolution, you can refine security measures and enhance preparedness, ensuring a more robust defense against future threats.

- Establishing a timeline helps in tracing such as when a suspicious PowerShell script was executed or a suspicious file was opened or downloaded, which systems were impacted first and how the attack spread. - System logs such as Syslog, Audit logs, Sysmon etc play a critical role to piece together attacker's TTP(Tactics, Techniques & Procedures). - For clear timeline, logs and detection roles are MUST.

Swiftly implement containment measures to prevent the incident from spreading further. In a recent data breach scenario, isolating affected systems and restricting unauthorized access helped minimize the potential damage and protect sensitive information.

Sincerely, if one fail to stop a thief, he would continue to fetch more from one's critical assets. one way to stop the threat actors is containment, providing a secure access control to stop intrusion

Leider wird noch zu häufig versucht einen Angriff nur einzudämmen. Soweit ein Domainzugriff erlangt wurde, ist in der Regel das System so stark betroffen das man Systeme komplett neu aufsetzen sollte. Dauert etwas länger aber man kann somit das Risiko einer erneuten Infektion deutlich minimieren. Zusätzlich kann man vielleicht grundsätzliche Designfehler beseitigen.

During the containment phase of a cyber incident response, the primary goal is to prevent the further spread of the incident and minimize its impact on the organization's systems, data, and operations. Points to be kept in mind: • Isolation of Affected Digital Assets • Access Controls Enforcement • Network Segmentation • Patching Vulnerabilities • Disable Remote Access • Network Traffic Monitoring • Recovery Preparation

Apply controls such as firewall rules, network segmentation, and access control lists to block or limit attackers' access and activity. Encryption can further protect assets and data. Effective containment minimizes risk, damage, and incident costs while preserving evidence integrity. This proactive step not only curtails the immediate threat but also stabilizes your environment, allowing for a more controlled and informed response, ultimately reinforcing your overall security posture.

Hintertüren und persistenzmechanismen beseitigen ist wahnsinnig aufwändig. Soweit ein Domainzugriff erlangt wurde, ist in der Regel das System so stark betroffen das man Systeme komplett neu aufsetzen sollte. Dauert etwas länger aber man kann somit das Risiko einer erneuten Infektion deutlich minimieren. Zusätzlich kann man vielleicht grundsätzliche Designfehler beseitigen.

Execute a systematic recovery plan to restore affected systems to normal operation. During a critical server failure, implementing backup restoration procedures allowed my team to recover data and services efficiently, minimizing downtime.

Die Wiederherstellung muss gemeinsam mit dem Business passieren. Wenn ich mir durch eine gute Business Continuity Zeit erkaufe, kann die IT hier die Systeme sauber aufbauen. Das ganze muss natürlich durch durch ein ordentliches Krisenmanagement orchestriert und durch eine abgestimmte krisenkommunikation begleitet werden.

This is the most important step in my opinion to prevent a reoccurring of the incident. However what I have seen is that after successfully containing an attack either the step is entirely missed or not documented well. This step is also important not only for our own organisation but also for informing the forums, industry and law, thus must be conducted with same seriousness like the containment of incidents.

I agree, the post-mortem analysis is the most important step in the incident management process. It's important to access the situation, get to the root cause, and create a plan whenever possible to avoid future incidents like this.

Additional considerations include communication strategies, legal obligations, and ongoing monitoring. In a complex incident, maintaining transparent communication with stakeholders, ensuring compliance with data protection laws, and implementing continuous monitoring practices were crucial elements that contributed to an effective incident response strategy.