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RFID badge clone → after-hours access

Brush-pass a target employee with a long-range RFID reader, capture their HID/iCLASS card data, clone to a blank — return after hours to badge into restricted floors.

Filed by AD Knowledge Base
§ Kill-chainDrag · zoom · scroll

§ Context

Assumed environment: target uses HID 125 kHz Prox or iCLASS legacy cards (no DESFire / SEOS). Physical access to a public-facing area (lobby, coffee shop, conference) where employees congregate.

§ Steps

  1. 01
    After-hours entry to target areaInitial Access
    T1078— Valid Accounts
  2. 02
    Drop in-room implant (rogue AP / cellular)Credential Access
    N-DHCP-ROGUE— Rogue DHCP Server
  3. 03
    Identify card type + reader locationInitial Access
    SE-PRETEXT— Pretexting
  4. 04
    Confirm clone at a non-monitored doorInitial Access
    SE-TAILGATE— Tailgating / Piggybacking
  5. 05
    Write captured data to blankInitial Access
    SE-RFID-CLONE— RFID / Badge Cloning
  6. 06
    Long-range read at brush-pass distanceInitial Access
    SE-RFID-CLONE— RFID / Badge Cloning

§ References

§ Frequently asked

What is the "RFID badge clone → after-hours access" attack path?
Brush-pass a target employee with a long-range RFID reader, capture their HID/iCLASS card data, clone to a blank — return after hours to badge into restricted floors. It chains 6 steps drawn from real-world offensive-security techniques.
What starting position does this attack require?
The first step is After-hours entry to target area (T1078) — a initial access primitive. Assumed environment: target uses HID 125 kHz Prox or iCLASS legacy cards (no DESFire / SEOS).
What is the final impact of this kill-chain?
The final step lands on Long-range read at brush-pass distance (SE-RFID-CLONE), which falls under Initial Access. From here, an operator typically pivots into post-exploitation or maintains persistence.
How can defenders detect or prevent this attack?
Detection and prevention vary per step. Refer to each linked MITRE ATT&CK entry under "References" — every technique on that page lists defensive controls, detection telemetry, and known threat-actor usage.

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