HackSkills is an organized knowledge base of installable skills that gives AI agents practical security knowledge across areas such as web security, privilege escalation, reverse engineering, and digital forensics. It is intended for bug bounty work, penetration testing, CTF competitions, and authorized security research. The catalogue entries are the project's own master, category, and topic skills.
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 agentmods add skills/yaklang/hack-skills/binary-protection-bypassnpx skills add yaklang/hack-skills --skill binary-protection-bypassgit clone --depth 1 https://github.com/yaklang/hack-skillsWrote 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/yaklang/hack-skills/binary-protection-bypass)<a href="https://agentmods.dev/skills/yaklang/hack-skills/binary-protection-bypass"><img src="https://agentmods.dev/badge/skills/yaklang/hack-skills/binary-protection-bypass.svg" alt="Measured on agentmods" 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 | $0.00052 | $0.03265 |
| Opus 5 | $0.00026 | $0.01632 |
| Sonnet 5 | $0.00010 | $0.00653 |
| Haiku 4.5 | $0.00005 | $0.00327 |
Grade A, and why
binary-protection-bypass 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 6d 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.
Copies of this mod
4 near-identical copies found in the catalogue:
- binary-protection-bypass — 100% identical, 0 lines differ
- binary-protection-bypass — 100% identical, 0 lines differ
- binary-protection-bypass — 100% identical, 0 lines differ
- binary-protection-bypass — 95% identical, 4 lines differ
How it starts
The opening of the file, as written. The whole thing — 296 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL: Binary Protection Bypass — Expert Attack Playbook
AI LOAD INSTRUCTION: Expert binary protection identification and bypass techniques. Covers ASLR, PIE, NX, RELRO, canary, FORTIFY_SOURCE, stack clash, CET shadow stack, and ARM MTE. Each protection is paired with its bypass methods and required primitives. Distilled from ctf-wiki mitigation sections and real-world exploitation. Base models often confuse which protections block which attacks and miss the combinatorial effect of multiple protections.
0. RELATED ROUTING
- stack-overflow-and-rop — ROP chains to bypass NX, ret2libc for ASLR bypass
- format-string-exploitation — primary method for leaking canary, PIE, libc addresses
- heap-exploitation — heap attacks for RELRO bypass (when GOT is read-only)
- arbitrary-write-to-rce — what to overwrite when GOT is protected by RELRO
Advanced Reference
Load PROTECTION_BYPASS_MATRIX.md for comprehensive protection × bypass × primitive matrix.
1. PROTECTION IDENTIFICATION
$ checksec ./binary
[*] '/path/to/binary'
Arch: amd64-64-little
RELRO: Full RELRO ← GOT read-only
Stack: Canary found ← stack canary enabled
NX: NX enabled ← stack not executable
PIE: PIE enabled ← position-independent code
FORTIFY: Enabled ← fortified libc functions
Quick Identification Table
| Protection | Check Command | Binary Indicator |
|---|---|---|
| ASLR | cat /proc/sys/kernel/randomize_va_space |
OS-level (0=off, 1=partial, 2=full) |
| PIE | checksec or readelf -h (Type: DYN) |
Binary compiled with -pie |
| NX | checksec or readelf -l (no RWE segment) |
gcc -z noexecstack (default on) |
| Canary | checksec or look for __stack_chk_fail@plt |
gcc -fstack-protector-all |
| Partial RELRO | readelf -l (GNU_RELRO segment, .got.plt writable) |
gcc -Wl,-z,relro |
| Full RELRO | readelf -l + .got section read-only |
gcc -Wl,-z,relro,-z,now |
| FORTIFY | Presence of __printf_chk, __memcpy_chk etc. |
gcc -D_FORTIFY_SOURCE=2 |
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.
- 6d ago First seen · 296 lines · 52 tokens per session scan A 90765916f7a2
binary-protection-bypass is a skill published in the GitHub repository yaklang/hack-skills (2,064 stars, last pushed 2mo ago), licensed MIT. It adds 52 tokens to every session and 3,265 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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