Analyzing Firmware Images

Firmware is a frozen Linux (or RTOS) image, and its security froze with it. Hardcoded credentials, command injection in CGI scripts, unsigned update packages, and debug interfaces left enabled are not edge cases -- they are the baseline. The work is extraction, orientation, and then asking the same questions you would ask of any system, with the knowledge that nobody has patched this one since it shipped.

When to Use

• Extracting and analyzing a firmware update file (.bin, .img, .chk, .trx)
• Reviewing IoT device security posture from a firmware image
• Looking for hardcoded credentials, keys, or secrets in device firmware
• Assessing the attack surface of an embedded device or router
• Evaluating update mechanisms and signature verification
• Analyzing a bare-metal or RTOS image from a microcontroller

When NOT to Use