Questions tagged [android]

Android is Google's Linux-based operating system for mobile devices. Initially developed by Android, Inc., Android is the world's most widely used smartphone platform.

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Getting corrupted video stream when Reverse Engineering UDP video stream from cheap Indian WiFi camera Drone

enter link description here I have this Quadcopter "Garuda" that can stream video to an Android APP named VS FPV PRO over wifi. I wanted to receive the video stream on my laptop to run some ...
Anish N.'s user avatar
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25 views

Is it possible to hide androidmanifest.xml

I heard from someone today that androidmanifest.xml is hidden by new malware. I couldn't find anything about this on the internet. Is it possible?
mustafa günel's user avatar
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Frida, Frida-tools, Android version Problems

I have this environment.. android : 9 version python : 2.7.12 I am not sure which version of Frida and Frida-tools I need to use to be compatible. I'm currently using 12.8.5, but an ascii codec ...
서영재's user avatar
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50 views

Need help reverse engineering an Android app

I want to make a script that allows me to download videos from an online streaming service. For that I need to make a http POST request to an url with the parameters acceptVideo, t and s, like this: ...
Andrei Iosifescu's user avatar
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How can I change the data type of `puVar1` in this C++ function?

I was reversing ( new to the reversing world of course) being using Ghidra for this. I get a C++ function AppChat::__Status::setDescription(ErrorCode param_1). Within this function, there's a variable ...
hanan's user avatar
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2 answers
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Looking for a packet forwarder on Android that redirects all packets to PC

I want to capture packets from Android apps. I need an packets forwarder on phone that creates a VPN to redirect all TCP packets to PC, then capture them with 'mitmproxy'. I want to use mitmproxy ...
aj3423's user avatar
  • 209
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1 answer
119 views

How to hook RuntimeException to prevent crashes?

I tried to find out how RuntimeException works internally in cs.android.com so I can understand how to prevent crashes but didn't find anything useful and I have no clue how to analyze components-...
IVs's user avatar
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How to make a apk packages manually like other linux distro packages?

Because Android Linux-based and it has its own package format named APK, so it will be possible to create APK packages manually from a specification like a specification for pacman packages in Arch ...
Smm's user avatar
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radare2 cross reference problem

I am analyzing an Arm64 Android shared library and I am trying to find a pointer to dlopen. I have successfully manually achieved this in IDA64 and Ghidra, however I want to automate the process with ...
shluvme's user avatar
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APK/Apktool If I decompile and recompile sources the app does not start

I'm trying to reverse an apk but there is a strange thing that happens, probably something new for me, basically if I decompile only the resources (not dex files) and recompile it zipalign/sign, the ...
zwave's user avatar
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Pass Play integrity api when app is repacked with Frida-gadget

I have decompiled an app that uses the Play integrity API. I attach the Frida-gadget and rebuild/resign the apk. After installing it on an unrooted phone (that passes the Play integrity API), the ...
user45316's user avatar
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Need SOME help decrypt xxtea encrypted Lua file from cocos2D game LIBRARY

iam trying from a while to figure out the key this cocos2dx game but couldn't figure it out if someone could abit help with the way to find these keys you check the the file from here https://github....
SHADOWDIANA's user avatar
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Failed to attach: unable to connect to remote frida-server: closed

I'm trying to bypass Frida (Android) local port scanning detection, so I followed this guide. The sequence of commands I used are : (magic_man is alias for frida_server) adb root adb push magic_man /...
exploitr's user avatar
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Recognize API calls of an APK

I have an Apk file for an app that functions as an AI image generator. I want to identify the specific API call responsible for the AI image generation. How can I do it?
Saad's user avatar
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How does Play integrity api assures Genuine app binary

I discovered that we can use the Play integrity api instead of safetynet now to assure the integrity off an app that is running. I am wondering if people have a way of bypassing the "Genuine app ...
user45316's user avatar
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decode lua files cocos2dx and protected from Frida and IDA64 for hooking

I want to decode the lua and other resources files. But i cant find the key when i use frida or ida 64 it crash before the game start. Game is here https://megamonglobal.com/ https://imgur.com/88Habwu
xbuyk987's user avatar
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Frida: how to hook a synthetic class

When reverse engineering an APK I came across a class that was marked synthetic. I have used JADX decompiler. The simplified result I got was: package com; public final class zz6 extends B implements ...
Sven Onderbeke's user avatar
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Reverse Android native lib

I am wondering how to reverse Android native lib. Its covered with ollvm so the code is awful and I can't understand anything I can use Frida but not Frida stalker (got kicked every time trying to ...
theArt's user avatar
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1 vote
1 answer
640 views

How to decode lua files and resource files that are protected from Frida and IDA64?

I am trying to decrypt Lua files from an Android game "The Sea Road: Fate Assembly" (APK download link). It uses Cocos2d-x, but it's encrypted, maybe with AES encryption. With Frida, the ...
xbuyk987's user avatar
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1 answer
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IDA Pro: JDWP error: ABSENT_INFORMATION - Desired information is not available

I am trying to debug a dex file from an APK file in IDA Pro. I set some breakpoints when launching the activity. When I start the process, the application waits for the debugger. After some time, IDA ...
Quayyum Ali's user avatar
1 vote
1 answer
377 views

possible to modify apk to bypass api request/response?

I have an apk for an app that contacts a web API that no longer exists. I do not have the source code. The app will not work normally without getting a response from the API. Something like this: ...
garbb's user avatar
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1 vote
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320 views

Read value from frida hooked native method Jlong parameter

I am new to using frida for hooking native android code i.e lib.so, so I have load the lib into ghidra and can find the native function. the native function is getting 5 params including jnienv and ...
hanan's user avatar
  • 309
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395 views

How does the Easy Victory cheat get data from another app in real time?

Easy Victory was developed in Java for Android I was very curious about how Easy Victory takes data from the game's balls and billiard cue force/velocity to calculate trajectories This is not a mod ...
Jonathan Silva's user avatar
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1 answer
275 views

How learn which functions are called in .so library at Android?

I want to learn how listen certain .so files. I mean what is the way to know which fuctions are called which body of code executed in shared library at Android? I just wanted mofify stock camera on my ...
Savox Saastuxl's user avatar
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146 views

How can I find which JNI library implements a java native method at runtime for Android applications?

I am doing security research, my target application includes some JNI libraries which implements some native java methods I am interested in. This app is obfuscated, I can't directly find the library ...
hldev's user avatar
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I Want to Edit lk partition to support fastboot binaries

based on what i found Oppo removed the fastboot binaries from my phone (Oppo A5s) and since the lk partition is the one that have it by default i would like to know how can i sort of inject the ...
Khalyl's user avatar
  • 11
1 vote
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JEB pro is not showing xrefs for native code (arm)

i have this problem when analyzing arm shared object. when working with IDA pro, it finds all xrefs but in jeb, most of xrefs are missing. when JEB finfishes, the final analysis lacks most of xrefs. I ...
shetal's user avatar
  • 51
2 votes
0 answers
177 views

APK / Decrypting [closed]

I'm new to Reverse Engineering, so I apologize if something is wrong. There is a free program that requires a license key, which can no longer be bought and obtained. I'm trying to write a KeyGen or ...
wh1tedance's user avatar
3 votes
0 answers
169 views

What is the best emulator/environment for android debugging?

I know the question smells like I want a ready solution but I have been trying many things and after a lot of headaches, still I can't do what I want. There are fast emulators but they don't provide ...
shetal's user avatar
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2 votes
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Need help extracting AP_Pack .obb files

I'm trying to extract the files for the series of 4 games - Sorcery!, which are in the format .obb. Thanks to a Hex editor I saw that the .obb was an AP_Pack, and looking for more information on the ...
Maneki's user avatar
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2 votes
0 answers
61 views

Difference between __openat and openat (Android)

While reverse engineering an Android process, I wanted to explore the openat function. I noticed that there is a symbol "openat" and another symbol "__openat". What is the ...
localacct's user avatar
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4 votes
0 answers
243 views

How to trace with Frida some specific functions in ARM ending with BX LR

I'am trying to trace down with Frida v16.0.11 (frida-trace) all calls to exported functions from "libssl.so" (Android, 32bit). But turns out that Frida is unable to hook some functions. One ...
Cyb's user avatar
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4 votes
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How to edite a compiled Reactive Native file "main.bundle"

I bought I vacuum robot from Dreame and needed to replace the Lidar sensor myself as in my country (Brazil) don't have technical assistance, but now it is not working properly because it says that don'...
Trix's user avatar
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3 votes
0 answers
260 views

How do i set these tricky boolean values to true in Smali-Dalvik?

These would allow me to make the input text field clickable and editable but the thing is how to do this. Instance field .field private g:Z 1 - invoke-virtual {p1, p2, v0}, Landroid/content/res/...
user43636's user avatar
3 votes
0 answers
53 views

How do I make a text field editable when the app is designed to autofill OTP SMS?

Hello fellow rev engineers, I'm running an app in an emulator and the problem is that for registration it must autofill the OTP sent by SMS, the text field isn't editable/clickable and I can't advance ...
user43628's user avatar
1 vote
0 answers
504 views

Bypass SSL pinning for android application

I am trying to analyze the network traffic from an android application for research purpose. I tried few approaches but unable to achieve the results. I am using rooted android emulator. I tried to ...
suplesh's user avatar
  • 11
2 votes
1 answer
604 views

Frida not hook functions

I want to hook a xxtea_decrypt but it not trigger and on other games it trigger but some games not trigger it. On ida pro its trigger the xxtea_decrypt but frida nope here is the code that i using it ...
xbuyk987's user avatar
2 votes
0 answers
260 views

How to encode file lua and resource files

I am trying to decrypt luas files it use cocos2dx but its encrypted maybe aes encryption. With frida i can extract most lua files but not all. And with ida64 i cant find the key.
xbuyk987's user avatar
4 votes
1 answer
2k views

Reverse engineering a flutter built apk

I was trying to reverse engineer an apk built with flutter. I actually feel like reversing flutter built apps did not get much reverse writeups on the community. one of the tools for the task ...
hanan's user avatar
  • 309
2 votes
1 answer
82 views

How do you identify a software framework?

I downloaded a free app but I want to stop it from showing ads. https://www.statista.com/statistics/869224/worldwide-software-developer-working-hours/ Apparently it's almost certainly in one of the ...
Ethan Miller's user avatar
2 votes
0 answers
98 views

Android game reverse http request body

I'm trying to reverse request that are made to an android game to learn more about how it works. I was able to find endpoints requests that are made with frida and mitmproxy but now I'm stuck because ...
Florent Trust's user avatar
2 votes
0 answers
33 views

How to re-create media file from android sender output stream

I would like to perform dynamic analysis on some android apps to check if these apps sending metadata with media files or not. Ideas like the picture below: Step 1: I prepared an image with metadata (...
ThanhLam112358's user avatar
3 votes
0 answers
457 views

Flashed "compatible" firmware onto two generic Allwinner A50 tablets

I'm already at least 3 days on this and can't find a way out. I'm still unsure if it fits here, but here we go! I have 3 A50 Allwinner tablets (HOW HT-705XT) that I wanted to root. Since the only way ...
Fusseldieb's user avatar
2 votes
0 answers
445 views

Cannot load libvulkan.so on Linux chroot running on Android while normal Android apps can load it

Environment First I will give a quick summary of my environment Device: Samsung Galaxy M20 (m20lte) SoC: Exynos 7904 (with Mali-G71 GPU) OS: Android 10 (Stock ROM with root using Magisk) Kernel: 4.4....
raspiduino's user avatar
2 votes
0 answers
122 views

I trying rewrite asm to c++ [closed]

This code generates an API key. I use it in an android app as .so file, but I need to rewrite it to java from c++. How do I translate? push rbp push r15 push r14 push r13 push r12 push ...
Master's user avatar
  • 21
2 votes
0 answers
396 views

Extract assets images from a games APK [closed]

I'm trying to remove some images from an android game, but when I try to view them in a hexadecimal viewer I see that they don't contain a PNG header, so I can't view them through the python PIL ...
amateur's user avatar
  • 21
3 votes
1 answer
254 views

Frida hook X509Certificate

I have an android application. It connects to a web socket server and uses the X509Certificate to verify the connection. newBuilder.trustManagers(WebSocketClient.sTrustManagers); By using Frida I ...
user123's user avatar
  • 65
3 votes
0 answers
198 views

How do I log a string in smali without its obfuscated function?

I'm reversing engineering an app and after analyzing with man-in-the-middle, I find that it obfuscates its messages to the server so it looks like a gibberish. String stc = ("msg=" + ...
r3verse3ngineer's user avatar
2 votes
0 answers
171 views

How can I detect which Android native function that is hooked by Mobile Substrate: MSHookFunction?

I want to detect hook behavior of MSHookFunction on Android. This is Mobile Substrate I use in my test app https://github.com/Breathleas/Android-Hooking-Template-Cydia-Substrate/tree/master/jni/...
Ken Kem's user avatar
  • 121
1 vote
0 answers
281 views

deobfuscate Dexgaurd obfuscated code

I was reversing an apk. the code detects whether the apk is running on a rooted device or not. if it is rooted or an emulator it will stop and close out. so this is the snippet code which I think it ...
hanan's user avatar
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