Performing Physical Intrusion Assessment

Overview

Physical intrusion assessment evaluates an organization's physical security controls by attempting to gain unauthorized access to facilities, server rooms, and restricted areas. This includes tailgating employees, cloning RFID access badges, bypassing locks, deploying rogue network devices, and testing security guard procedures. Physical security testing is a critical component of full-scope red team engagements, as it often provides the most direct path to network access. MITRE ATT&CK maps physical access techniques under T1200 (Hardware Additions) and T1091 (Replication Through Removable Media).

When to Use

• When conducting security assessments that involve performing physical intrusion assessment
• When following incident response procedures for related security events
• When performing scheduled security testing or auditing activities
• When validating security controls through hands-on testing

Prerequisites

• Signed authorization letter (carry at all times during assessment)
• Emergency contact for client security team (24/7)
• Get-out-of-jail letter signed by executive authority
• Physical security testing toolkit
• Body camera or documentation equipment
• Disguise/cover identity materials (uniform, badge, clipboard)

MITRE ATT&CK Mapping

Physical Security Testing Toolkit

Technique 1: Tailgating

Tailgating involves following an authorized person through a secured entry point without presenting credentials.

Methods:

• Hands full approach: Carry boxes/equipment, ask someone to hold the door
• Smoke break return: Wait near smoking area, follow employees back inside
• Delivery driver: Wear delivery uniform, carry packages
• Busy entrance timing: Enter during shift change or lunch rush
• Door propping: Observe if employees prop doors open

Countermeasures to test:

• Turnstiles / mantraps
• Security guard challenge procedures
• Piggybacking detection systems
• Employee security awareness

Technique 2: Badge Cloning

# Proxmark3 - Read a low-frequency (125kHz) HID card
proxmark3> lf hid read
# Output: HID Prox TAG ID: 2006xxxxxx - FC: 123 CN: 45678

# Clone to a T5577 blank card
proxmark3> lf hid clone --fc 123 --cn 45678

# Read high-frequency (13.56MHz) MIFARE card
proxmark3> hf mf rdbl --blk 0 -k FFFFFFFFFFFF

# Long-range capture with custom antenna (up to 3 feet)
proxmark3> lf hid read  # with extended antenna

# Flipper Zero - Read and emulate
# RFID > Read > Hold card to Flipper > Save > Emulate

Badge cloning attack flow:

1. Position near badge reader (elevator, door entry)
2. Read badge wirelessly as employee passes (1-3 second window)
3. Clone to blank card
4. Use cloned badge to access secured areas
5. Document which areas were accessible

Technique 3: Lock Bypassing

# Electronic keypad - thermal imaging after use
# Warmer keys = more recently pressed
# Use FLIR camera to capture heat signatures within 30 seconds

# REX (Request to Exit) sensor bypass
# Insert thin wire or use a can of compressed air to trigger motion sensor
# on the inside of a mag-locked door

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