Master disk geometry and partition structure analysis. This scenario tests your ability to correctly identify tools and techniques required to investigate concealed storage volumes during evidence examination.
You are analyzing a suspect's primary workstation hard drive in a computer-forensics lab in Denver regarding an intellectual property theft case. During the initial disk structure analysis, you observe a discrepancy between the total physical disk capacity and the actively allocated logical volumes available to the operating system.
Further inspection of the partition table reveals an unmounted, hidden partition residing at the end of the physical drive space. You need to utilize an appropriate tool to safely inspect, modify the partition flag, or mount the partition geometry to gain access to the data stored within.
Based on the output, the partition starting at sector 409602048 has its MBR type byte set to 0x17, preventing standard Windows OS from automatically assigning it a drive letter and mounting it.
In a computer-forensics lab in Denver, an investigator is examining a suspect's hard drive and discovers a hidden partition. To gain access to the data stored in this partition, which tool should the investigator use?
The mmls utility output identifies the disk geometry containing a Master Boot Record (MBR) partition table. Slot 003 indicates an NTFS partition with a hex code of 0x17 (Hidden NTFS) instead of the standard 0x07. This byte manipulation is a common anti-forensics technique used to obscure volumes from casual OS inspection.
This scenario occurs during the Examination phase, specifically focusing on physical disk structure analysis and overcoming data concealment tactics prior to logical data collection.
GParted (GNOME Partition Editor) is a GUI-based disk management utility commonly included in forensic boot environments (such as SANS SIFT or Kali Linux). An investigator can use GParted to safely view the physical partition layout, edit partition flags (unhiding it by changing the type back to 0x07), or prepare the volume boundaries for mounting in a read-only state to access the concealed data.
• B (Wireshark): A network protocol analyzer used for capturing and examining PCAP files; it has no functionality for disk partition editing.
• C (Volatility): An advanced memory forensics framework designed exclusively for analyzing RAM dumps, not persistent disk storage or partition tables.
• D (Cain & Abel): A legacy password recovery and network sniffing tool; it does not interact with physical disk volumes or partition headers.
In a live lab scenario, an investigator would never modify the original suspect drive. The drive is attached via a physical write-blocker, and a raw image (`.dd` or `.e01`) is acquired. The investigator would then mount the image and utilize disk editors (like GParted, Sleuth Kit tools, or EnCase) to identify the offsets of the hidden volume, parse its Master File Table (MFT), and extract the logical files without breaking the chain of custody.
A fundamental concept in digital forensics is understanding how an OS reads a disk. The partition table (MBR or GPT) is merely a map. Suspects often use tools to change a partition's "type byte" in this map to mark it as hidden or unallocated, bypassing standard file explorers. However, the data inside the partition boundaries remains entirely intact. Forensic disk-level analysis bypasses the OS's logical interpretation, allowing investigators to read the raw hex and identify these discrepancies immediately.
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