A security-assessment guide for iOS applications, including installed apps and IPA files, which are the packaged files used to distribute iPhone and iPad apps. It follows the OWASP mobile-security testing approach across app code, storage, networking, authentication, and cryptography.

Use it to inspect IPA files and Mach-O binaries, test HTTPS, gRPC, and WebSocket traffic, review keychain and SQLite data, and assess SSL pinning, jailbreak detection, biometrics, and anti-debugging controls.

It helps uncover weaknesses in an iOS app and its communication with backend services, including unsafe data storage, weak protections, and flawed authentication.

ios-pentest — Skill for Claude Code and Codex by JustineDevs

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.

Any agent

npx skills add JustineDevs/premortem --skill ios-pentest

Clone the repo

git clone --depth 1 https://github.com/JustineDevs/premortem

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/justinedevs/premortem/ios-pentest/github.svg)](https://agentmods.dev/skills/justinedevs/premortem/ios-pentest)

Your own site

<a href="https://agentmods.dev/skills/justinedevs/premortem/ios-pentest"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/ios-pentest/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/justinedevs/premortem/ios-pentest"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/ios-pentest.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,452 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original 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.

Model	Per session	Once invoked
Fable 5.1	$0.00095	$0.02452
Opus 5	$0.00048	$0.01226
Sonnet 5	$0.00019	$0.00490
Haiku 4.5	$0.00010	$0.00245

Measured 9d ago against content hash 1c816d537317, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ios-pentest 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 9d ago.

The scan reads SKILL.md. This mod also ships 6 executable files (scripts/biometric_bypass.js, scripts/crypto_hooks.js, scripts/jailbreak_bypass.js, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.agents/skills/security/ios-pentest/SKILL.md · 169 lines

How it starts

The opening of the file, as written. The whole thing — 169 lines — stays where its author put it; the contents beside it link to each section on GitHub.

iOS Mobile Application Penetration Testing

Thin router for an iOS app security assessment. Full OWASP MASTG coverage (recon → static → dynamic → network → storage → crypto → auth → reporting). Detailed runbooks live under workflows/ and methodology/; load them only when needed.

When to Use

New iOS application security assessment (IPA + installed app).
Bypass SSL pinning, jailbreak detection, biometric, anti-debug.
Extract and triage keychain / NSUserDefaults / files / SQLite.
Intercept and tamper HTTPS / gRPC / WebSocket traffic.
OWASP MASTG / MASVS compliance testing.
Analyze a decrypted or encrypted Mach-O binary.

Trigger Phrases

"pentest iOS app", "test this IPA", "bypass SSL pinning iPhone", "extract keychain", "MASTG iOS", "iOS jailbreak bypass", "analyze .ipa", "test iPhone app".

When NOT to Use This Skill

Android APK analysis → use android-pentest.
Generic web API testing for the backend → use web-pentest / api-pentest.
iOS source-code review (you have the repo) → use secure-code-review with iOS language packs.
macOS desktop app analysis → use macos-pentest.

Decision Tree

target acquired?
├── no binary yet → workflows/ipa_decryption.md
└── yes
    ├── need HTTPS visibility? → workflows/ssl_pinning_bypass.md
    ├── app exits on jailbroken device? → workflows/jailbreak_detection_bypass.md
    ├── hunting credentials/tokens? → workflows/keychain_extraction.md
    ├── testing login / biometric? → workflows/auth_testing.md
    └── full engagement → workflows/complete_assessment.md

Parallelism Hints

Run concurrently (independent I/O, no shared state):

class-dump -H App.app/App -o headers/
otool -L App.app/App and otool -hv App.app/App
strings -a App.app/App | grep ...
plutil -p App.app/Info.plist
Objection enumeration in a separate spawn.

Must run sequentially (shared Frida session / spawn state):

Frida --no-pause spawn → wait for bypass script to land → drive app → then attach further scripts.
Objection ios sslpinning disable → then any traffic-dependent command.
ideviceimagemounter → then frida-ps -U.
Keychain dump requires app launched at least once post-install.

Read the full file on GitHub · 169 lines

Files

What ships with it

31 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.

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.

9d ago First seen · 169 lines · 95 tokens per session scan A 1c816d537317

Subscribe to this mod's changes

ios-pentest is a skill published in the GitHub repository JustineDevs/premortem (2 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 95 tokens to every session and 2,452 once invoked, about $0.0005 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 2026-09-03.

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