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 SecurityTalent/bugskill-ai --skill windows-av-evasiongit clone --depth 1 https://github.com/SecurityTalent/bugskill-aiWrote 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/securitytalent/bugskill-ai/windows-av-evasion)<a href="https://agentmods.dev/skills/securitytalent/bugskill-ai/windows-av-evasion"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/windows-av-evasion/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/securitytalent/bugskill-ai/windows-av-evasion"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/windows-av-evasion.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 | $0.00049 | $0.03166 |
| Opus 5.5 | $0.00020 | $0.01266 |
| Sonnet 5.5 | $0.00010 | $0.00633 |
| Haiku 4.5 | $0.00005 | $0.00317 |
Grade A, and why
windows-av-evasion 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
100% identical to windows-av-evasion — 0 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 — 343 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL: AV/EDR Evasion — Expert Attack Playbook
AI LOAD INSTRUCTION: Expert AV/EDR evasion techniques for Windows. Covers AMSI bypass, ETW bypass, .NET assembly loading, shellcode execution, process injection, unhooking, payload encryption, and signature evasion. Base models miss detection-specific bypass chains and syscall-level evasion nuances.
0. RELATED ROUTING
Before going deep, consider loading:
- windows-privilege-escalation when privesc tools are blocked by AV
- windows-lateral-movement when lateral movement tools trigger EDR
- active-directory-kerberos-attacks when Rubeus/Mimikatz are detected
- active-directory-acl-abuse for non-binary AD attacks (less AV-sensitive)
Advanced Reference
Also load AMSI_BYPASS_TECHNIQUES.md when you need:
- Detailed AMSI bypass code patterns (memory patching, reflection)
- PowerShell-specific AMSI bypasses
- .NET AMSI bypass techniques
1. AMSI BYPASS OVERVIEW
AMSI (Antimalware Scan Interface) inspects PowerShell, .NET, VBScript, JScript, and Office macros at runtime.
Key AMSI Bypass Categories
| Category | Method | Detection Risk | Persistence |
|---|---|---|---|
| Memory patching | Patch AmsiScanBuffer in amsi.dll |
Medium | Per-process |
| Reflection | Modify AMSI init flags via .NET reflection | Medium | Per-session |
| String obfuscation | Encode/split AMSI trigger strings | Low | Per-payload |
| PowerShell downgrade | Force PS v2 (no AMSI) | Low | Per-session |
| CLM bypass | Escape Constrained Language Mode | Medium | Per-session |
| COM hijack | Redirect AMSI COM server | Low | Per-user |
Quick AMSI Bypass (One-Liners)
# PowerShell v2 downgrade (if .NET 2.0 available — no AMSI in v2)
powershell -Version 2
# Reflection-based (set amsiInitFailed = true)
# Obfuscated to avoid static detection — see AMSI_BYPASS_TECHNIQUES.md for full patterns
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 343 lines · 49 tokens per session scan A 86506b6e5bf2
windows-av-evasion is a skill published in the GitHub repository SecurityTalent/bugskill-ai (13 stars, last pushed 21d ago), licensed MIT. It adds 49 tokens to every session and 3,166 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to windows-av-evasion, differing in 0 lines, and is treated as a copy.
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