ctf-forensics

A digital-forensics and signal-analysis guide for capture-the-flag (CTF) challenges involving collected computer evidence.

In plain words
What is it for?
It is for analyzing .dd and .E01 disk images, .raw and .vmem memory dumps, .pcap and .pcapng network captures, hidden images or audio, and Windows .evtx event logs.
Why use it?
It helps reconstruct what happened from disk images, memory dumps, network captures, hidden media, and system logs.

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/wgpsec/aboutsecurity/ctf-forensics
Any agent
npx skills add wgpsec/AboutSecurity --skill ctf-forensics
Clone the repo
git clone --depth 1 https://github.com/wgpsec/AboutSecurity

Made for: Claude Code, Codex.

Per session 100 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,480 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00100 $0.01480
Opus 5 $0.00050 $0.00740
Sonnet 5 $0.00020 $0.00296
Haiku 4.5 $0.00010 $0.00148

Measured 3d ago against content hash b07ff2abfba3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

ctf-forensics scanned grade B with 1 finding 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 3d 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
skills/ctf/ctf-forensics/SKILL.md · 97 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. 3d ago First seen · 97 lines · 100 tokens per session scan B b07ff2abfba3

Subscribe to this mod's changes

ctf-forensics is a skill published in the GitHub repository wgpsec/AboutSecurity (1,709 stars, last pushed 3d ago), with no licence file. It adds 100 tokens to every session and 1,480 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.