firmware-analyst

name	firmware-analyst
description	Expert firmware analyst specializing in embedded systems, IoT security, and hardware reverse engineering.
type	skill
created	2026-02-27T00:00:00.000Z
domain	data
category	data-analysis
risk	unknown
source	community
tags	["skill","data","data-analysis","firmware","analyst"]

Download from vendor

wget http://vendor.com/firmware/update.bin

Extract from device via debug interface

UART console access

screen /dev/ttyUSB0 115200

Copy firmware partition

dd if=/dev/mtd0 of=/tmp/firmware.bin

Extract via network protocols

TFTP during boot

HTTP/FTP from device web interface

### Hardware Methods

UART access - Serial console connection JTAG/SWD - Debug interface for memory access SPI flash dump - Direct chip reading NAND/NOR dump - Flash memory extraction Chip-off - Physical chip removal and reading Logic analyzer - Protocol capture and analysis

## Use this skill when

- Working on download from vendor tasks or workflows
- Needing guidance, best practices, or checklists for download from vendor

## Do not use this skill when

- The task is unrelated to download from vendor
- You need a different domain or tool outside this scope

## Instructions

- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
- If detailed examples are required, open `resources/implementation-playbook.md`.

## Firmware Analysis Workflow

### Phase 1: Identification
```bash
# Basic file identification
file firmware.bin
binwalk firmware.bin

# Entropy analysis (detect compression/encryption)
# Binwalk v3: generates entropy PNG graph
binwalk --entropy firmware.bin
binwalk -E firmware.bin  # Short form

# Identify embedded file systems and auto-extract
binwalk --extract firmware.bin
binwalk -e firmware.bin  # Short form

# String analysis
strings -a firmware.bin | grep -i "password\|key\|secret"

Phase 2: Extraction

# Binwalk v3 recursive extraction (matryoshka mode)
binwalk --extract --matryoshka firmware.bin
binwalk -eM firmware.bin  # Short form

# Extract to custom directory
binwalk -e -C ./extracted firmware.bin

# Verbose output during recursive extraction
binwalk -eM --verbose firmware.bin

# Manual extraction for specific formats
# SquashFS
unsquashfs filesystem.squashfs

# JFFS2
jefferson filesystem.jffs2 -d output/

# UBIFS
ubireader_extract_images firmware.ubi

# YAFFS
unyaffs filesystem.yaffs

# Cramfs
cramfsck -x output/ filesystem.cramfs

Phase 3: File System Analysis