Frida anti instrumentation

Skill Rudra-ravi/frida-skills/frida-anti-instrumentation

Analyze and bypass anti-Frida, anti-debugging, root or jailbreak checks, emulator checks, ptrace, port scans, module scans, and integrity checks.From its SKILL.md

Install

npx -y skills add Rudra-ravi/frida-skills --skill frida-anti-instrumentation

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

1 stars1 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

SKILL.md

2.1 KB, 505 tokens by cl100k_base, as published. Nobody here has run it

Frida Anti-Instrumentation

Use this skill when the app exits, hides behavior, blocks attach, or detects Frida/root/jailbreak/emulator/debugging.

Diagnosis Order

Prove whether failure happens before or after Frida attaches.
Use spawn mode for early checks.
Log exits, process checks, file checks, property checks, and native anti-debug calls.
Identify the specific detection before bypassing it.
Keep only narrow hooks that change the detected condition.

Android Boundaries

Java.perform(() => {
  const Runtime = Java.use("java.lang.Runtime");
  Runtime.exec.overload("java.lang.String").implementation = function (cmd) {
    console.log("Runtime.exec", cmd);
    return this.exec(cmd);
  };
});

Common Java surfaces: File.exists, SystemProperties.get, Build.*, package manager queries, shell command execution, debugger checks, emulator properties.

Native Boundaries

for (const name of ["open", "access", "stat", "ptrace", "prctl", "connect"]) {
  try {
    const f = Module.getGlobalExportByName(name);
    Interceptor.attach(f, { onEnter() { console.log(name); } });
  } catch (_) {}
}

Common native surfaces: /proc, maps, task, frida, gum-js-loop, TCP port scans, ptrace, prctl, syscall, dlopen, checksum functions.

iOS Boundaries

Look for file checks, URL scheme checks, fork, ptrace, sysctl, csops, dyld image scans, suspicious library names, and jailbreak path lists.

Verification

The app reaches the previously blocked screen or behavior.
Logs show which detection hook fired.
Removing the hook restores the failure.
The final bypass does not mask unrelated errors or crash paths.

References

Frida JavaScript API: https://frida.re/docs/javascript-api/
Frida CodeShare: https://codeshare.frida.re/
OWASP MASTG Frida Android: https://mas.owasp.org/MASTG/tools/android/MASTG-TOOL-0001/
OWASP MASTG Frida iOS: https://mas.owasp.org/MASTG/tools/ios/MASTG-TOOL-0039/

What ships with it: 1 file

224 B alongside SKILL.md

agents/

openai.yaml224 B