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Mobile Application Security

Mobile Application Security is a skill for Claude Code from Masriyan/Claude-Code-CyberSecurity-Skill. It costs 46 tokens per session (2,011 once invoked), scanned A, original, MIT.

A set of procedures for assessing Android and iOS applications through code inspection and runtime testing. It uses OWASP mobile security standards and requires authorization.

In plain words
What is it for?
It is for inspecting APK and IPA files, checking mobile security controls, guiding runtime instrumentation, reviewing keychain or keystore use, and triaging potentially malicious apps.
Why use it?
It helps identify unsafe storage, transport, platform interactions, and other mobile-app weaknesses in a documented way.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the cybersecurity plugin — 20 skills shipped together

not rated 397repo +13 3d ago A scan 46 tokens original MIT

Good fit It is for inspecting APK and IPA files, checking mobile security controls…

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/masriyan/claude-code-cybersecurity-skill/17-mobile-security
View source ↗ Masriyan/Claude-Code-CyberSecurity-Skill security-life.org
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 Masriyan/Claude-Code-CyberSecurity-Skill --skill 17-mobile-security
Clone the repo
git clone --depth 1 https://github.com/Masriyan/Claude-Code-CyberSecurity-Skill

Made for: Claude Code.

Or install cybersecurity, the plugin that ships this one along with the rest of its 20 skills.

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.

agentmods badge for Mobile Application Security

README.md
[![agentmods](https://agentmods.dev/badge/skills/masriyan/claude-code-cybersecurity-skill/17-mobile-security.svg)](https://agentmods.dev/skills/masriyan/claude-code-cybersecurity-skill/17-mobile-security)
Your own site
<a href="https://agentmods.dev/skills/masriyan/claude-code-cybersecurity-skill/17-mobile-security"><img src="https://agentmods.dev/badge/skills/masriyan/claude-code-cybersecurity-skill/17-mobile-security.svg" alt="Measured on agentmods" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,011 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.02011
Opus 5 $0.00023 $0.01006
Sonnet 5 $0.00009 $0.00402
Haiku 4.5 $0.00005 $0.00201

Measured 7d ago against content hash ebc9f78d5488, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

Mobile Application Security 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 7d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/apk_analyzer.py), 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.

skills/17-mobile-security/SKILL.md · 173 lines

How it starts

The opening of the file, as written. The whole thing — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mobile Application Security

Purpose

Enable Claude to assess Android and iOS application security against the OWASP MASVS (Mobile Application Security Verification Standard) and execute tests from the OWASP MASTG (Mobile Application Security Testing Guide). Claude performs static analysis on APK/IPA artifacts, guides dynamic instrumentation (Frida/objection), reviews secure storage, transport, and platform-interaction controls, and triages potentially malicious mobile apps.

Authorization Required: Only test applications you own or are explicitly authorized to assess. Decompiling and modifying third-party apps may violate licenses and law. Confirm written scope before proceeding.

Activation Triggers

This skill activates when the user asks about:

  • Android (APK/AAB) or iOS (IPA) application security testing
  • OWASP MASVS / MASTG verification or a mobile pentest checklist
  • Decompiling, reversing, or static analysis of a mobile app
  • Insecure data storage, hardcoded secrets, or keystore/keychain review
  • Certificate pinning, SSL bypass, or mobile TLS/transport security
  • Frida / objection dynamic instrumentation or runtime hooking
  • AndroidManifest.xml, exported components, deep links, or Info.plist review
  • Mobile malware analysis or suspicious APK triage
  • Root/jailbreak detection, tampering, or anti-RE controls

Prerequisites

pip install requests pyaxmlparser

Optional enhanced capabilities:

  • apktool — APK decode/rebuild
  • jadx — Dalvik → Java decompiler
  • apkid — packer/obfuscator/compiler fingerprinting
  • frida / objection — dynamic instrumentation
  • mobsf (MobSF) — automated static+dynamic analysis platform
  • Android SDK platform-tools (adb), unzip, openssl

Core Capabilities

1. APK Static Analysis

When asked to analyze an APK:

  1. Unpack & decode — apktool d app.apk; extract AndroidManifest.xml, classes*.dex, resources.arsc, native libs (lib/), and assets.
  2. Manifest review — flag:
    • android:debuggable="true", android:allowBackup="true"
    • Exported components (activity/service/receiver/provider with exported="true" or implicit via intent-filter) lacking permissions
    • usesCleartextTraffic="true" / permissive network_security_config
    • Dangerous/excessive permissions; custom permissions with weak protectionLevel
    • Deep links / android:autoVerify (app-link hijack), exported ContentProvider paths
  3. Secret hunting — scan decompiled sources/resources/assets for API keys, tokens, private keys, cloud creds, hardcoded crypto keys/IVs, and backend URLs.
  4. Decompile — jadx to Java; review auth, crypto, WebView (addJavascriptInterface, setJavaScriptEnabled, loadUrl with untrusted input), and SQL.
  5. Native & packing — apkid for packers/obfuscators; inspect lib/*/*.so for JNI entry points and hardcoded data.
  6. Signature — verify signing scheme (v1/v2/v3), debug-cert use, and integrity.

Read the full file on GitHub · 173 lines

Files

What ships with it

2 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.

  1. 7d ago First seen · 173 lines · 46 tokens per session scan A ebc9f78d5488

Subscribe to this mod's changes

Mobile Application Security is a skill published in the GitHub repository Masriyan/Claude-Code-CyberSecurity-Skill (397 stars, last pushed 3d ago), licensed MIT. It adds 46 tokens to every session and 2,011 once invoked, about $0.0002 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 2026-08-30.

APKMobileSecurityandroidclaude-skillsclaudecodecybersecurityfridaiosipamastgmasvsmobile-securityreverse-engineering
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