ctf-forensics

A collection of digital-forensics and signal-analysis techniques for capture-the-flag (CTF) security challenges. Digital forensics means examining recorded data such as disks, memory, logs, network traffic, documents, and audio to find evidence.

In plain words
What is it for?
Use it to analyze disk images, memory dumps, event logs, network captures, cryptocurrency transactions, steganography, PDFs, Windows registries, Docker images, crash dumps, power traces, and DTMF audio.
Why use it?
It helps when the answer is hidden in an artifact rather than exposed by directly attacking a live program. It provides relevant ways to inspect files, traces, and captured activity.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/curiouslearnerdev/online_tools-ai/ctf-forensics
Any agent
npx skills add CuriousLearnerDev/Online_Tools-AI --skill ctf-forensics
Clone the repo
git clone --depth 1 https://github.com/CuriousLearnerDev/Online_Tools-AI

Made for: Claude Code, Codex.

Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 9,454 The whole file, excluding the scripts and references it only reads on demand.
Security scan D 2 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00088 $0.09454
Opus 5 $0.00044 $0.04727
Sonnet 5 $0.00018 $0.01891
Haiku 4.5 $0.00009 $0.00945

Measured 2d ago against content hash 7661bc4c0641, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade D, and why

ctf-forensics scanned grade D 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 2d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo mount -o loop,ro image.dd /mnt/evidence

Reaches for credential fileshighPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

- **Chrome/Edge:** Decrypt `Login Data` SQLite with AES-GCM using DPAPI master key
storage/Skill/ctf-skills/ctf-forensics/SKILL.md · 379 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

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.

  1. 2d ago First seen · 379 lines · 88 tokens per session scan D 7661bc4c0641

Subscribe to this mod's changes

ctf-forensics is a skill published in the GitHub repository CuriousLearnerDev/Online_Tools-AI (52 stars, last pushed 1mo ago), with no licence file. It adds 88 tokens to every session and 9,454 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it D with 2 findings (asks for root, reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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