acquiring-disk-image-with-dd-and-dcflddlisted

# Acquiring Disk Image with dd and dcfldd ## When to Use - When you need to create a forensic copy of a suspect drive for investigation - During incident response when preserving volatile disk evidence before analysis - When law enforcement or legal proceedings require a verified bit-for-bit copy - Before performing any destructive analysis on a storage device - When acquiring images from physical drives, USB devices, or memory cards ## Prerequisites - Linux-based forensic workstation (SIFT, Kali, or any Linux distro) - `dd` (pre-installed on all Linux systems) or `dcfldd` (enhanced forensic version) - Write-blocker hardware or software write-blocking configured - Destination drive with sufficient storage (larger than source) - Root/sudo privileges on the forensic workstation - SHA-256 or MD5 hashing utilities (`sha256sum`, `md5sum`) ## Workflow ### Step 1: Identify the Target Device and Enable Write Protection ```bash # List all connected block devices to identify the target lsblk -o NAME,SIZE,TYPE,MOUNTPOINT,MODEL # Verify the device details fdisk -l /dev/sdb # Enable software write-blocking (if no hardware blocker) blockdev --setro /dev/sdb # Verify read-only status blockdev --getro /dev/sdb # Output: 1 (means read-only is enabled) # Alternatively, use udev rules for persistent write-blocking echo 'SUBSYSTEM=="block", ATTRS{serial}=="WD-WCAV5H861234", ATTR{ro}="1"' > /etc/udev/rules.d/99-writeblock.rules udevadm control --reload-rules ``` ### Step 2: Prepare the