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What Is Incident Response?
Incident response is a process and not simply an isolated event. To make incident response successful, teams need to use a harmonized and organized strategy to approach any incident.
Here are the five important steps of an effective incident response program:
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Preparation is the key most crucial ingredient of an incident response program that works. Even the best people cannot effectively tackle an incident if there are no predetermined guidelines. There must be a strong plan to support the team. Development and documentation of IR policies, threat intelligence feeds, cyber hunting exercises and communication guidelines are the most crucial elements of this plan.
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Detection and Reporting
This part is concerned with monitoring security events for detecting, alerting and reporting foreseen security incidents.
* Monitoring of security events in the environment can be done with the use of firewalls, intrusion prevention systems, and data loss prevention measures.
* Detection of potential security incidents is done by by correlating alerts within a Security Information and Event Management (SIEM) solution.
* Before alerts are issued, analysts create an incident ticket, present initial findings, and lay down a preliminary incident classification.
* When reporting, there must be room for regulatory reporting escalations.
Triage and Analysis
This is where most efforts to properly scope and understand the security incident takes place. Resources need to be utilized for data gathering from tools and systems for further examination, and also to identify compromise indicators. People must have in-depth skills and a thorough understanding of digital forensics, live system responses, and memory and malware analysis.
In collecting evidence, analysts have to concentrate on three core areas:
a. Endpoint Analysis
> Know the tracks left by the threat actor
> Get the artifacts required to create a timeline of activities
> Conduct a forensic examination of a bit-for-bit copy of systems, and get RAM to parse through and spot key artifacts for determining what happened in a device
b. Binary Analysis
> Check dubious binaries or tools the attacker used and document those programs’ functionalities.
> Go through presently used systems and event log technologies and determine the extent of compromise.
> Document all machines, accounts, etc. that may have been compromised for damage containment and neutralization.
Containment and Neutralization
This counts as one of the most vital phases of incident response. The approach for containment and neutralization is developed from the intelligence and compromise indicators gathered found in the analysis phase. Following the restoration of the system and verification of security, normal operations may continue.
Even after the incident is resolved, more work must be done. All information useful in the prevention of similar problems in the future should be documented. This phase can be split into the following:
> completion of incident report for the improvement of the incident response plan and prevention of similar security problems in the future
> post-incident monitoring to prevent threat actors’ reappearance
> updates of threat intelligence feeds
> identifying measures for preventive maintenance
> improving coordination across the organization for proper implementation of new security methods