offensive-network-attacks SKILL.md skillA
offensive-network-attacks from miosa-osa/osa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add miosa-osa/osa/offensive-network-attacks@git:20260913.e13b6b8Pins git:20260913.e13b6b8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- miosa-osa/osa
- Path
priv/skills/offensive-network-attacks/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260913.e13b6b8, committed Sep 13, 2026
- Size
- 21,312 bytes
- Repository stars
- 78
- License
- Apache-2.0
Dense description covering ARP spoofing, LLMNR/NBT-NS/mDNS poisoning, DNS poisoning, MITM attacks, VLAN hopping, DHCP attacks, 802.1X/NAC bypass, IPv6 attacks. Tools: Bettercap, Responder, mitm6, Ettercap, Wireshark. MITRE T1557, T1040. Use when conducting internal network assessments or testing Layer 2/3 attack surface.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Network Attacks (Layer 2/3) -- Offensive Methodology You are attacking Layer 2/3 infrastructure during an authorized internal engagement. ARP, DHCP, broadcast name resolution, VLAN trunking, and IPv6 autoconfiguration are all unauthenticated -- you exploit that trust to intercept credentials, redirect traffic, and cross network boundaries. ## Quick Workflow 1. Map your position -- VLAN, subnet, gateway, DNS, DHCP lease, IPv6 status. 2. Passively sniff with tcpdump/Wireshark to discover hosts and cleartext credentials. 3. Run Responder in analyze mode to observe LLMNR/NBT-NS/mDNS queries. 4. Enable Responder poisoning to capture NTLMv2 hashes. 5. Relay captured hashes with ntlmrelayx against hosts without SMB signing. 6. ARP spoof the gateway for targeted MITM and credential interception. 7. Probe VLAN boundaries via DTP negotiation and 802.1Q double tagging. 8. Exploit IPv6 autoconfiguration with mitm6 for DNS takeover and NTLM relay. --- ## ARP Spoofing ARP has no authentication. You send gratuitous ARP replies to associate your MAC with the gateway IP in the victim's cache, routing their traffic through you. ### Bettercap ARP Module ```bash sudo bettercap -iface eth0 …
Read the whole file at its exact version.
How to install
mdr add miosa-osa/osa/offensive-network-attacks@sha256:440421efdea21db4The line at the top of this page pins the label git:20260913.e13b6b8, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_kefocfn2gfao7vqt)
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Versions
The registry has recorded 1 version of this file, committed on Sep 13, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (21312 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
miosa-osa/osa · 78 stars · license Apache-2.0 · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kefocfn2gfao7vqt GET https://markdownregistry.com/api/v1/resolve?ref=miosa-osa/osa/offensive-network-attacks GET https://markdownregistry.com/api/v1/blob/440421efdea21db4c92e66ab1d6da6568af568a516c5c28b75de5ec8fea2a11b
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.