Cloud Forensics evidence sources and Collecting evidence

Cloud forensics is the process of collecting and analyzing digital evidence from the cloud. It is becoming increasingly important as more and more of our data is stored in the cloud.
Challenges of Cloud Forensics
There are several challenges to conducting cloud forensics, including:
  • Chain of custody: Maintaining a chain of custody is essential for ensuring that evidence is not tampered with. This is more difficult in the cloud, where data is often spread across multiple servers and jurisdictions.
  • Data volatility: Cloud data is often stored in temporary locations, such as virtual memory, which can be overwritten or deleted quickly. This makes it important to collect evidence quickly and efficiently.
  • Data volume: The amount of data stored in the cloud can be massive, making it difficult to collect and analyze all of the relevant evidence.

 

  • We’ve built a platform to automate incident response and forensics in AWS, Azure and GCP — you can grab a demo here. You can also download a free playbook we’ve written on how to respond to security incidents in the cloud.
Cloud Forensics Evidence Sources
There are a variety of potential evidence sources in the cloud, including:
  • Cloud storage: This includes data stored in services like Google Drive, Dropbox, and Microsoft OneDrive.
  • Email: Cloud email services like Gmail and Outlook can be a valuable source of evidence.
  • Logs: Cloud providers generate logs of all activity that takes place on their systems. These logs can be used to track the activities of users and systems.
  • Metadata: Metadata is data about data, such as the creation date, file size, and author. Cloud providers often store metadata about the files and objects that are stored in their systems.
  • Virtual machines: Cloud virtual machines can be a source of evidence, as they can contain the operating system, applications, and data of the user.
Collecting Cloud Forensics Evidence
The process of collecting cloud forensics evidence can vary depending on the specific cloud service and the type of evidence being collected. However, there are some general steps that can be followed:
Identify the evidence sources: The first step is to identify the potential sources of evidence that are relevant to the investigation.
Preserve the evidence: Once the evidence sources have been identified, it is important to preserve them to prevent them from being tampered with or deleted.
Collect the evidence: The next step is to collect the evidence from the cloud sources. This may involve using the cloud provider’s own tools or third-party forensic tools.
Analyze the evidence: Once the evidence has been collected, it can be analyzed to extract the relevant information.
Conclusion
Cloud forensics is a complex and challenging field, but it is essential for investigating crimes and civil disputes in the cloud. By understanding the challenges of cloud forensics and the different evidence sources that are available, investigators can collect and analyze the evidence they need to bring criminals to justice.