What is a forensic image Why is it used?

Creating and backing up a forensic image helps prevent loss of data due to original drive failures. The loss of data as evidence can be detrimental to legal cases. Forensic imaging can also prevent the loss of critical files in general.

What is a forensic image?

A forensic image is a special type of copy of the original evidence, it contains all of the data found in the original, but that data is encapsulated in a forensic file format which makes it tamper-proof.

Why is a forensic copy important?

A forensic copy would capture not only the 200GB of visible files and folders, but would also capture the remaining 800GB of unallocated space. This is important to digital forensic investigators because unallocated space may contain deleted files or other residual data that can be invaluable during discovery.

What is forensic image analysis?

Also known as forensic image analysis, the discipline focuses on image authenticity and image content. This helps law enforcement leverage relevant data for prosecution in a wide range of criminal cases, not limited to cybercrime.

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What is a forensic image or copy of a hard drive?

A Forensic Image is a comprehensive duplicate of electronic media such as a hard-disk drive. … A Forensic Clone is also a comprehensive duplicate of electronic media such as a hard-disk drive. Artifacts such as deleted files, deleted file fragments, and hidden data may be found in its slack and unallocated space.

What is meant by a forensic copy?

A forensic image (forensic copy) is a bit-by-bit, sector-by-sector direct copy of a physical storage device, including all files, folders and unallocated, free and slack space. … Creating and backing up a forensic image helps prevent loss of data due to original drive failures.

What is a physical image?

A physical image collects all bits of data on the storage medium, regardless of whether it is allocated or unallocated to a file system. A logical image collects only the data that is visible to the file system.

Why you need to use a write blocker?

A write blocker is any tool that permits read-only access to data storage devices without compromising the integrity of the data. A write blocker, when used properly, can guarantee the protection of the data chain of custody. … The tool shall not prevent obtaining any information from or about any drive.

What is a hash value in digital forensics?

Hash values are used to identify and filter duplicate files (i.e. email, attachments, and loose files) from an ESI collection or verify that a forensic image or clone was captured successfully. … Each hashing algorithm uses a specific number of bytes to store a “ thumbprint” of the contents.

How do you do a forensic analysis?

The forensic analysis process includes four steps:

  1. Use a write-blocker to prevent damaging the evidentiary value of the drive.
  2. Mount up and/or process the image through forensics software.
  3. Perform forensic analysis by examining common areas on the disk image for possible malware, evidence, violating company policy, etc.
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Why is it important to analyze images in a forensic investigation?

Since images can be used to determine responsibilities – or as part of evidence in administrative, civil, or criminal cases – the forensic analysis of digital images has become more significant in determining the origin and authenticity of a photograph in order to link an individual to a device, place, or event.

What is forensic analysis in cyber security?

Forensic analysis refers to a detailed investigation for detecting and documenting the course, reasons, culprits, and consequences of a security incident or violation of rules of the organization or state laws. Forensic analysis is often linked with evidence to the court, particularly in criminal matters.

How do you create a forensic disk image?

  1. Open Windows Explorer and navigate to the FTK Imager Lite folder within the external HDD.
  2. Run FTK Imager.exe as an administrator (right click -> Run as administrator).
  3. In FTK’s main window, go to File and click on Create Disk Image.
  4. Select Physical Drive as the source evidence type. Click on Next.

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What is the first rule of digital forensics?

The first rule of digital forensics is to preserve the original evidence. During the analysis phase, the digital forensics analyst or computer hacking forensics investigator (CHFI) recovers evidence material using a variety of different tools and strategies.

What does it mean to image a disk?

A disk image is a copy of the entire contents of a storage device, such as a hard drive, DVD, or CD. The disk image represents the content exactly as it is on the original storage device, including both data and structure information. … Uses of disk images include: Burning CDs and DVDs. System backup.