Difference between revisions of "Forensic Report: Examination Procedures (en)"

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Sure! Here's the translated text in English while retaining the wiki format:
 
 
 
==5. Digital Forensic Examination Procedures==
 
==5. Digital Forensic Examination Procedures==
  

Latest revision as of 05:36, 21 October 2024

5. Digital Forensic Examination Procedures

Digital forensic examination procedures are a series of systematic steps taken to collect, analyze, and preserve digital evidence from a device or system. The goal is to obtain relevant information for an investigation, whether criminal, civil, or internal corporate.

5.1 Evidence Receipt

  • Date and Time of Receipt: Accurate records of when evidence is received are crucial for maintaining the chain of custody and the integrity of the evidence.
  • Condition of Evidence: Document the physical condition of the device (e.g., cracked, damaged, signs of tampering), as well as its power state (on, off).
  • Initial Steps:
    • Documentation: Make detailed notes of all device details, including brand, model, serial number, and included accessories.
    • Photography: Take photos of the device from various angles before and after the examination. This is useful for documenting the initial condition and any changes that occur during the examination process.
    • Video: Record a short video when unpacking the device to visually document the process.

5.2 Acquisition Process

  • Acquisition Methods:
    • Live Acquisition: Copying data directly from a device that is currently operational. This method is useful for capturing volatile data (easily lost) such as memory.
    • Static Acquisition: Copying data from a device that has been powered off. This method is more commonly used because it does not disturb the device's condition.
    • Disk Imaging: Creating a bit-by-bit copy of the entire storage medium. This is the most recommended method to maintain data integrity.
  • Integrity Verification:
    • Hash Value: Calculate the hash value of both the original data and its copy. Compare the two hash values to ensure that the copy made is identical to the original.
    • Checksum: Calculate the checksum of the data to verify data integrity.

5.3 Data Analysis

  • Types of Analysis:
    • File System Analysis: Identifying the type of file system used, directory structure, and existing files.
    • Network Analysis: Analyzing network activities previously performed by the device, including IP addresses, ports, and protocols used.
    • Malware Analysis: Searching for the presence of malware, viruses, or other malicious programs.
    • Email Analysis: Analyzing emails present on the device, including email content, attachments, and metadata.
    • Web History Analysis: Analyzing the web browsing history previously conducted.
  • Tools and Techniques:
    • Forensic Tools: Utilizing various forensic software such as EnCase, FTK Imager, Autopsy, and Sleuth Kit.
    • Scripting: Using programming languages like Python to perform more complex analyses.

5.4 Documentation

  • Examination Report: Create a detailed report regarding the entire examination process, from evidence receipt to analysis results.
  • Screenshots: Take screenshots of important analysis results.
  • Log: Record all activities conducted during the examination process in a log file.
  • Chain of Custody: Document the chain of custody of the evidence completely, including who held the evidence, when, and where.

Important: The entire examination process must be conducted according to established procedures and forensic ethical standards to maintain evidence integrity and avoid contamination.

Note: The explanation above provides an overview of digital forensic examination procedures. Actual procedures may vary depending on the type of device, operating system, and investigation objectives.

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