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/dailyyarn/ctf-agent/ctf-miscnpx skills add dailyyarn/CTF-agent --skill ctf-miscgit clone --depth 1 https://github.com/dailyyarn/CTF-agentWrote 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/dailyyarn/ctf-agent/ctf-misc)<a href="https://agentmods.dev/skills/dailyyarn/ctf-agent/ctf-misc"><img src="https://agentmods.dev/badge/skills/dailyyarn/ctf-agent/ctf-misc.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 | $0.00084 | $0.05016 |
| Opus 5 | $0.00042 | $0.02508 |
| Sonnet 5 | $0.00017 | $0.01003 |
| Haiku 4.5 | $0.00008 | $0.00502 |
Grade C, and why
ctf-misc scanned grade C with 2 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 5d 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.
Harvests environment variableshighData exfiltration
Enumerating or grepping the environment for keys collects credentials unrelated to what the mod says it does.
`COPY (SELECT '') TO PROGRAM 'cmd'` executes OS commands as postgres. `pg_read_file('/path')` reads files. Extract credentials from `pg_basebackup` archives (`global/1260` = `pg_authid`). SSH tunnel to Unix sockets: `ssh Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
import urllib.parse This is a copy
92% identical to ctf-misc — 116 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 — 401 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CTF Miscellaneous
Quick reference for miscellaneous CTF challenges. Each technique has a one-liner here; see supporting files for full details.
Additional Resources
- pyjails.md - Python jail/sandbox escape techniques, quine context detection, restricted character repunit decomposition, func_globals module chain traversal, restricted charset number generation, class attribute persistence
- bashjails.md - Bash jail/restricted shell escape techniques
- encodings.md - Encodings, QR codes, esolangs, Verilog/HDL, UTF-16 tricks, BCD encoding, multi-layer auto-decoding, Gray code cyclic encoding, indexed directory QR reassembly, multi-stage URL encoding chains, RTF custom tag extraction, SMS PDU decoding
- rf-sdr.md - RF/SDR/IQ signal processing (QAM-16, carrier recovery, timing sync)
- dns.md - DNS exploitation (ECS spoofing, NSEC walking, IXFR, rebinding, tunneling)
- games-and-vms.md - WASM patching, Roblox place file reversing, PyInstaller, marshal (including code injection), Python env RCE, Z3, K8s RBAC, floating-point precision exploitation, multi-phase crypto games with HMAC commitment-reveal and GF(256) Nim, custom assembly language sandbox escape via Python MRO chain, Benford's Law bypass
- games-and-vms-2.md - ML weight perturbation negation, cookie checkpoint game brute-forcing, Flask cookie game state leakage, WebSocket game manipulation, server time-only validation bypass, LoRA adapter weight merging and visualization, De Bruijn sequence, Brainfuck instrumentation, WASM linear memory manipulation, neural network encoder collision
- linux-privesc.md - Sudo wildcard parameter injection (fnmatch), crafted pcap for sudoers.d, monit confcheck process injection, Apache -d override, backup cronjob SUID, PostgreSQL COPY TO PROGRAM RCE, PostgreSQL backup credential extraction, NFS share exploitation, SSH Unix socket tunneling, PaperCut Print Deploy privesc, Squid proxy pivoting, Zabbix admin password reset via MySQL, WinSSHTerm credential decryption
What ships with it
8 files 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.
- 5d ago First seen · 401 lines · 84 tokens per session scan C ab1fe5e208da
ctf-misc is a skill published in the GitHub repository dailyyarn/CTF-agent (5 stars, last pushed 5mo ago), licensed MIT. It adds 84 tokens to every session and 5,016 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 2 findings (harvests environment variables, makes network calls). It is 92% identical to ctf-misc, differing in 116 lines, and is treated as a copy.
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