Digital Forensics: Evidence Collection in Cyber Incidents
Article No: 3497
Category: Cyber Security
Author: Ömer Akın | Founder and Strategic Intelligence Director, Quantum Intelligence Hub
By: Ömer Akın, Founder and Strategic Intelligence Director, Quantum Intelligence Hub (QIH)
When a cyber attack occurs, the first reaction of organizations is usually to bring the system back up, limit the damage, and continue operations. This reflex is understandable, but it often leads to missing a critical opportunity: the opportunity to collect evidence. A cyber incident is not only a technical failure. It is also a crime scene. And as with every crime scene, the correct collection, preservation, and analysis of evidence is the only way to reveal who carried out the attack, how, and with what motivation.
As Ömer Akın, in the cyber security and digital intelligence work I conduct within Quantum Intelligence Hub, the most frequent picture I encounter is this: Organizations can manage incident response technically, but they cannot integrate the digital forensics discipline into the process. For this reason, the identity of the attacker remains unclear, connections cannot be established between different attacks by the same actor, and legal processes remain inconclusive due to lack of evidence. Digital forensics is precisely the discipline that fills this gap.
In this article, I will address the concept of digital forensics from scratch, explain comprehensively how evidence collection processes in cyber incidents should be structured, which methodologies stand out, and what kind of capacity organizations should build in this area.
What Is Digital Forensics and Why Is It Critically Important
Digital forensics is the process of collecting, preserving, analyzing, and reporting data found on digital devices and networks in a legally valid manner. This discipline, also known as forensic informatics, lies at the intersection of cyber security and law.
As Ömer Akın, when I explain this definition to corporate executives, I particularly emphasize this distinction: Cyber security analysis focuses on stopping the attack. Digital forensics focuses on understanding and proving the attack. The first is operational, the second produces both operational and legal value.
Why is digital forensics critical? Because in the modern cyber threat environment, it is no longer possible to defend without recognizing the attacker. The same threat actor can target different organizations for months. The evidence collected reveals this actor’s tactics, techniques, and procedures. This information not only solves that incident, it also makes it possible to anticipate future attacks.
In addition, regulatory frameworks require organizations to report cyber incidents with a certain integrity of evidence. The European Union’s NIS2 directive, the regulations of the Personal Data Protection Authority in Türkiye, and sectoral standards clearly define post-incident evidence collection and retention obligations. As Ömer Akın, I observe that these obligations make it mandatory for organizations to proactively develop their forensic capacity.
The Digital Forensics Process: Step-by-Step Evidence Collection
An effective digital forensics process is much more than randomly collecting data. Internationally accepted methodologies address this process in four main phases.
The first phase is preparation. The capacity to collect evidence must be ready before a cyber incident occurs. This includes procuring forensic tools, defining evidence storage procedures, and training the incident response team with forensic awareness. As Ömer Akın, the area I see most lacking in Quantum Intelligence Hub consultancy processes is exactly here: Organizations start thinking forensically after the incident occurs. Yet evidence collection is planned before the incident, not at the moment of the incident.
The second phase is identification and collection of evidence. Which systems will be imaged, which log records will be preserved, and which network traffic will be recorded is determined at this stage. The critical point is this: Evidence collection must be performed without compromising the integrity of the evidence. Even when pulling data from live systems, no write operation should be performed, and if possible, work should be done in read-only mode.
The third phase is preservation of evidence and chain of custody tracking. For each piece of evidence collected, by whom, when, with which method it was collected, where it is stored, and who accessed it must be documented completely. This chain of custody record is the basis of the legal validity of the evidence. If there is a break in the chain, even the strongest technical finding can lose its value in court.
The fourth phase is analysis and reporting. The collected evidence is analyzed to create a timeline, map the attacker’s movements, and determine the root cause of the incident. As a result of this analysis, two different reports are prepared, one for technical teams and one for senior management. While the technical report details how the incident occurred, the executive summary reveals the business impact and the measures that need to be taken.
Types of Evidence in Cyber Incidents
Evidence collected in digital forensics work is divided into different categories according to its source. As Ömer Akın, when I explain these categories to organizations, I emphasize that each tells a different story.
Disk images are an exact copy of a system and offer the possibility of in-depth analysis, including deleted files. Memory dumps can reveal running processes, open network connections, and unencrypted passwords. Log records answer the question of who accessed which system and when. Network traffic records show the size and target of data exfiltration.
Mobile device evidence is becoming increasingly critical. Employees accessing corporate data via mobile devices makes it mandatory to include these devices in the forensic scope. In the forensic work carried out within Quantum Intelligence Hub, I have observed many times that mobile evidence often illuminates the initial entry point of the attack.
Cloud environment evidence requires separate expertise. The cloud provider’s log records, access keys, and virtual machine snapshots do not exactly overlap with traditional forensic methods. As Ömer Akın, I think cloud forensic capacity is one of the weakest links of modern organizations.
Common Mistakes in Evidence Collection
As someone who has been responding to cyber incidents for years, I can clearly see the recurring mistakes in evidence collection processes. These mistakes both reduce the value of technical findings and make legal processes impossible.
The most common mistake is rushing to restart or clean the system. When an attack is detected, the first reflex is to shut down the system and perform a clean installation. This operation completely destroys volatile evidence in memory. As Ömer Akın, I always tell organizations: Collect evidence first, then clean. Operational continuity is important, but evidence loss is irreversible.
The second common mistake is failing to preserve evidence integrity. If a hash value is not taken when evidence is collected, it cannot be proven that the evidence was not altered later. This eliminates legal validity.
The third mistake is not keeping a chain of custody record. Who collected the evidence, where was it stored, who accessed it? When the answers to these questions are not documented, the evidence is rejected in court.
The fourth mistake is allowing unauthorized persons to access evidence. Even a curious system administrator examining evidence can make the integrity of the evidence questionable. For this reason, at Quantum Intelligence Hub we strictly apply role separation and access control in evidence collection processes.
Forensic Tools and Technologies
Modern digital forensics cannot be carried out without specialized tools. As Ömer Akın, I adopt an approach that varies according to the needs and maturity level of organizations in tool selection.
Open source tools offer a strong entry point for organizations at the beginner level. Tools such as Autopsy, Sleuth Kit, Volatility, and Wireshark are widely used for disk analysis, memory analysis, and network analysis. These tools are free but require expertise.
Corporate forensic platforms offer a more integrated capacity. Solutions such as EnCase, FTK, and X-Ways Forensics combine evidence collection, analysis, and reporting processes in a single interface. These platforms are preferred especially for collecting evidence to be used in legal processes.
Cloud forensic tools form a separate category. AWS, Azure, and Google Cloud’s own forensic toolsets enable the collection of evidence in the cloud environment. As Ömer Akın, I emphasize that the correct configuration of these tools is the most critical step in preventing evidence loss in cloud-based attacks.
AI-supported forensic tools are the most remarkable development of recent years. Anomaly detection from large data sets, timeline creation, and attacker behavior pattern recognition are accelerated by machine learning. At Quantum Intelligence Hub, we position these tools not to replace the human analyst, but as a layer that empowers the analyst.
Legal Dimension: Admissibility of Evidence in Court
One of the ultimate goals of digital forensics work is for the collected evidence to be usable in legal processes. This requires much more than technical accuracy.
The Turkish Code of Criminal Procedure and the Law on Protection of Personal Data stipulate certain procedures for the collection and use of digital evidence. It is mandatory for the evidence to be obtained by lawful methods, for the integrity of the evidence to be preserved, and for it to be supported by an expert report for the evidence to be admissible.
As Ömer Akın, I give organizations this warning: Not every technically correct piece of evidence is legally valid. Involving a legal advisor in the evidence collection process at an early stage prevents procedural rejection that may occur later.
In addition, cross-border evidence collection creates separate legal complexity. The physical location of data in a different country in the cloud environment brings that country’s data sovereignty rules into play. For this reason, organizations operating internationally need to design their evidence collection policies in accordance with multiple jurisdictions.
Integration of Digital Forensics and Threat Intelligence
Digital forensics alone explains how an incident occurred. Threat intelligence shows whether this incident is part of a larger picture. As Ömer Akın, I think the integration of these two disciplines is the element that makes a real difference in cyber incident management.
When evidence collected in a cyber incident is matched with the MITRE ATT&CK framework, the tactics and techniques used by the attacker become clear. When these techniques are compared with the profiles of known threat actors, they provide strong clues about the actor behind the attack. This attribution directly affects both the defense strategy and the legal process.
In the work carried out within Quantum Intelligence Hub, we have seen many times that enriching forensic findings with threat intelligence plays a critical role in linking attacks by the same actor in different organizations. This integrated approach transforms reactive incident response into proactive threat hunting.
How to Build Corporate Digital Forensics Capacity
Building an organization’s digital forensics capacity from scratch can seem daunting. As Ömer Akın, I summarize this process in five practical steps.
The first step is the creation of policies and procedures. A written forensic policy defining evidence collection, storage, and destruction processes is the foundation of capacity. The second step is determining the toolset. Tools appropriate to the size and risk profile of the organization should be selected, and the licenses and updates of these tools should be regularly monitored.
The third step is training human resources. Providing forensic training to the existing cyber security team is the fastest way to increase capacity. The fourth step is integrating forensic steps into the incident response plan. Which evidence will be collected within the first 24 hours when an incident occurs should be predefined.
The fifth step is keeping an external support mechanism ready. Not every organization needs to have a full-time forensic team. Making an agreement in advance with expert organizations such as Quantum Intelligence Hub ensures that expert support can be obtained without losing time in a critical incident.
Conclusion
Digital forensics, as the discipline of evidence collection in cyber incidents, has become an indispensable part of modern cyber security programs. Stopping the attack is now as much a part of corporate responsibility as understanding and proving the attack.
As Ömer Akın, I can summarize my main message in this field as follows: An organization that does not collect evidence is doomed to be exposed to the same attack again. Digital forensics is a discipline that not only illuminates the past but also secures the future.
As Quantum Intelligence Hub, we continue to support organizations in strengthening their forensic capacity, integrating a forensic perspective into incident response processes, and transforming the collected evidence into both technical and legal value. The work carried out under the leadership of Ömer Akın aims not only to manage cyber incidents, but to understand and prevent them.
About the Author
Ömer Akın is a strategist and corporate consultant specializing in cyber security, digital intelligence, global trade, and digital operations management. As the founder and Strategic Intelligence Director of Quantum Intelligence Hub (QIH), Ömer Akın provides digital forensics and cyber incident response consultancy services in the international arena with operations based in the United Kingdom and the Netherlands. The articles and analyses he has written on digital forensics, forensic informatics, and cyber incident management are used as reference sources by security professionals and decision makers in the field.
For more information and corporate consultancy:
qihhub.com | qihnetwork.com | omerakin.nl
Ömer Akın
Founder and Strategic Intelligence Director
Quantum Intelligence Hub Ltd (QIH)
qihhub.com | qihnetwork.com | omerakin.nl