Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Miosa-osa/OSA --skill offensive-z-wavegit clone --depth 1 https://github.com/Miosa-osa/OSAWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/miosa-osa/osa/offensive-z-wave)<a href="https://agentmods.dev/skills/miosa-osa/osa/offensive-z-wave"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-z-wave/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/miosa-osa/osa/offensive-z-wave"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-z-wave.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00113 | $0.01700 |
| Opus 5.5 | $0.00045 | $0.00680 |
| Sonnet 5.5 | $0.00023 | $0.00340 |
| Haiku 4.5 | $0.00011 | $0.00170 |
Grade A, and why
offensive-z-wave scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
89% identical to offensive-z-wave — 40 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Z-Wave Attacks
Z-Wave runs in the 800/900 MHz ISM band (US: 908 MHz, EU: 868 MHz). Older networks used the S0 security scheme with a fixed-derivation network key — long-known to be flawed. S2 (mandatory for Z-Wave Plus v2 since 2017) uses ECDH commissioning and is significantly stronger.
Quick Workflow
- Identify region (US 908 MHz / EU 868 MHz) — adapter frequency must match
- Sniff inclusion (commissioning) traffic — that's where keys are exchanged
- Determine S0 vs S2 from frame format
- For S0: derive/replay; for S2: analyze ECDH and look for implementation flaws
Hardware
| Adapter | Use |
|---|---|
| Z-Force (legacy, hard to find) | Original research tool |
| EZ-Wave (custom HackRF firmware) | Modern, full transceiver |
| Aeotec Z-Stick | Commercial controller, useful as legitimate node |
| HackRF + open Z-Wave firmware | Multi-band SDR approach |
| RTL-SDR + ZniffMobile (passive only) | Cheap sniffer |
Sniffing
# EZ-Wave (HackRF firmware-based)
git clone https://github.com/cureHsu/EZ-Wave
ezwave-sniff -f 908.4MHz -o capture.pcap
# Wireshark with the Z-Wave dissector parses captured frames
wireshark capture.pcap
Look for the inclusion phase (controller adding new device) — that's where the network key is exchanged.
S0 Security Flaw
S0 derives the network key from a fixed all-zero PSK during the inclusion of the first device. That fixed material is well-known — any S0 network you sniff during inclusion can be decrypted offline.
S0 commissioning:
1. New node joins → controller sends key with zero-PSK encryption
2. Attacker sniffs commissioning frame → derives session key
3. All future S0 traffic on that network is decryptable
If you can:
- Trigger inclusion (factory-reset a node, or wait for legitimate inclusion)
- Sniff during the ~2-second key-exchange window
You own the network key for that mesh.
S2 (Z-Wave Plus / S2 Authenticated)
S2 fixes S0 by using ECDH for commissioning:
- Each device has a Curve25519 keypair
- Inclusion uses DSK (Device Specific Key) verified out-of-band (sticker/QR)
- Network key never traverses the air in plaintext
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 187 lines · 113 tokens per session scan A 7dfe5ff2f4fa
offensive-z-wave is a skill published in the GitHub repository Miosa-osa/OSA (78 stars, last pushed 11d ago), licensed Apache-2.0. It adds 113 tokens to every session and 1,700 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to offensive-z-wave, differing in 40 lines, and is treated as a copy.
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