Questions tagged [patching]
Patching is the process of adding or deleting code from an executable file in order to modify its functioning.
120
questions
0
votes
1answer
27 views
Change global variable value in IDA
I have a global variable stored in the data section:
data:00007FF7DDBF78E4 00 00 00 00 dword_7FF7DDBF78E4 dd 0
Is there a way to change its value?
1
vote
1answer
116 views
Binary diff + patching across versions
What are the current options for binary patching which works across different versions of the binary?
E.g. we created a binary patch for a specific version of a binary and want to apply that patch to ...
1
vote
0answers
39 views
Need help with patching .plt function
I want to patch a .plt function but my friend told me I should use "xref" to find the real caller.
I found it and patched it, Will the .plt function execute?
The function start with PUSH {R4-...
0
votes
2answers
52 views
How to calculate the value needed to branch two points in IDA pro?
I need to find how to get the value to make a branch between two points in IDA Pro, but I can’t figure it out. For more context: the instructions I’m following says “Calculate the value needed to do a ...
0
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2answers
166 views
How to prevent File Modification in C++
so i want to protect my software against reverse-engineering and i want to add checksum verification to prevent patching the binary but the problem that if i added a checksum verification the binary ...
1
vote
1answer
74 views
Inserting two digits into binary per Hex - without making EXE corrupt
I dont have much knowledge with assemblers. I beg ur pardon in advance.
I need to change an IP address in a win-binary (Net) where the IP its hard-coded.
Just changing the IP with an Hex Editor would ...
1
vote
0answers
112 views
ARM Cortex-M0 - How to either (non-intrusively) extract firmware or modify downloadable firmware (NuMicro NUC126)
As a hands-on introduction into RE, I've decided to take on a small, simple embedded device. In hindsight, it was probably a mistake. This "project" has consumed me for about 2 weeks. ...
1
vote
0answers
126 views
How to patch C# binary?
I have C# binary. I was able to use dnSpy to decompile it, and analyze. The binary was obfuscated with xenocode obfuscator.
I figured out that I can directly manipulate IL instructions if I just find ...
0
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0answers
59 views
SSL pinning deep problem
I'm working on one Android app for potential malware analysis and I am trying to MITM it. I found out that the verify function never executes (X509 class) when i hook onto my proxy but rather that app ...
1
vote
1answer
563 views
Bypass USB key activation of a software
(The software is Chinese and contains malware. I do not know if I could upload it here, so temporarily, please let me describe it)
I am asked by a spa store to "do something" to make a ...
1
vote
0answers
96 views
Automating binary patching in Hopper Disassembler using python
I am curious to know if anyone has done anything similar to what I am looking to achieve...
I have a .ipa file (iOS application) that I load into to Hopper Disassembler.
I search for a string to ...
0
votes
1answer
117 views
Calling MessageBoxW x64 confused about pointer
OK, I am very new to x64dbg. I used to use OllyDbg a lot and I'm having some problems with this.
I just made a customized version of MS-PAINT for practice by changing a few things like the default ...
0
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0answers
109 views
je change to jne and program issue
I am new to forum and new to programming (total noob).
I am trying to modify a program using ollydbg and x32dbg and while attached to file I make the changes fine and it does what I expected.
My ...
1
vote
0answers
49 views
Statically injecting translated NASM assembly into existing ELF binary
I'm trying to statically patching ELF binaries in order to incorporate code that can help provide run-time protection.
In an effort to save time writing and debugging assembly, I took the following no-...
0
votes
1answer
63 views
ARM7 32-bit Branch Offset Calculator
I need to patch an arm7 program by replacing this fopen function by another function.
.text:00018D68 52 D7 FF EB BL fopen
...
.plt:0000EAB8 ; FILE *fopen(const ...
3
votes
0answers
126 views
How to see what has changed in a patched binary?
I am exploring MacOS Deckset app.
It has a trial version available on the official website.
But there's a cracked version available on torrent trackers.
I want to know what was changed by the people ...
3
votes
1answer
138 views
Construct a number from 0-999.9 using 5 data bytes of a MIDI SysEx message
I'm sending MIDI messages to a proprietary turntable that has an LCD screen on it. The normal software sends out updates via MIDI SysEx to display the current tempo on the LCD. The MIDI is being ...
2
votes
1answer
133 views
OllyDBG saved executable crashes
I'm kind of new to this sort of thing so I hope someone can help me. I'm currently trying to understand how most malwares infect other files/modify an exe. Using Visual Studio 2017 I made an exe (with ...
0
votes
1answer
163 views
How can I mod the built-in software of my digital piano?
I'm curious if anyone has any insight on how I can manipulate or mod the code for the built-in software of a digital piano (specifically the Kawai ES8 - or really any digital piano with a display ...
0
votes
1answer
484 views
Android app crashes even while not edited, how can I solve it?
Installed an application from google playstore and then transferred to it my computer to apparently edit it and without any changes I made to it then I tried to install it through ADB, well the ...
2
votes
1answer
246 views
Hiding a file in a Windows operating system
I am trying to understand how to hide a file in windows as a way to learn about win api and malware analysis.
What I am trying to do is to make a file "disappear" via some kind of manipulation. But I ...
1
vote
2answers
190 views
Patched Application causes Acces Violation c0000005
I've been working with this application to remove it's trial limitations.
But every byte I change, it throws an acces violation.
Piece of the code:
Original:
003354C6 - 0F85 D3000000 - jne ...
1
vote
1answer
73 views
Executable code in the same location differs in memory and on disk
I'm trying to inject code to change the byte value of a CMP in an executable from 0 to 2 at runtime, in order to effectively no-op a boolean comparison as part of an effort to insert my own behavior. ...
0
votes
0answers
192 views
tutorial of run-time hacking with Dnspy
Is anybody have good resource or tutorial of run-time hacking or memory hacking with .NET Applications with dnspy.
0
votes
1answer
288 views
Patch Arm binary with Ida
In Ida I can patch binary that run on x86 , but not binary that run on Arm.
How can I simply patch binary , change assembly(not only hex) and save to new binary file
1
vote
1answer
140 views
How to Insert Call to Already Imported Function in amd64 Windows DLL using IDA Pro?
I am trying to patch a function in 64-bit Windows DLL to load data I have inserted into the resource table of the DLL. I want to insert code something like this:
mov r8d, 0Ah ; lpType
mov ...
1
vote
0answers
157 views
How to hook eval function in node.js
As the eval() function of JavaScript is an evil, I want to hook or monkey-patch eval() function of JavaScript in node.js. I want to intercept all arguments passed in eval() function. Please guide me ...
0
votes
1answer
412 views
How to Modify CBZ Branch in ARM64?
If I want after running the CBZ W0, loc_C5C8 command
Run to the ADRP X8,#selRef_curent_version@PAGE command
regardless of the condition (in picture), what should I do?
1
vote
1answer
120 views
How to save a binary after patching it in cheat engine?
The title asks it all tho
But cheat engine will not allow you to save the patch binary so
what methods can I try to save it after I patch it in cheat engine?
2
votes
0answers
166 views
How to use arm-none-eabi-objcopy to extract texts, translate, and rebuild ELF file
I have this arm elf file: https://www20.zippyshare.com/v/2yLS1H8D/file.html
I want to extract the user-interface texts to translate them to my local language.
I found the section containing the texts ...
0
votes
0answers
51 views
Alternative APIs to hook instead of messagebox for message pop ups?
So i am reversing an app that pops up a message at some point, but its not doing this using messagebox
i also tried to pause and then run to user code but didn't work, so what are some of the other ...
0
votes
1answer
920 views
How to change the title of a windows GUI app when patching? (the title that usually writes the application name)
So I'm trying to patch a binary (its a GUI app), and i want to patch the title of it as well when I'm patching it, and by title i mean the text that appears on top of the app that usually is the ...
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votes
2answers
200 views
How to add a message box to a PE [closed]
So, I have a "simple" question. I have this PE that I want to show a message box when the file is launched. How can I patch the file and make the window? Thanks!
2
votes
2answers
321 views
Find a instruction in a binary file (PE) based on a virtual address of a string reference
English is not my first language, so I'm sorry if my text isn't so clear.
I'm trying to program an automatic patcher for a PE binary that should work for multiple versions of this executable. For ...
2
votes
3answers
287 views
Injecting C++ code, while also maximizing compatibility with other injections
Using the New Vegas Script Extender C++ API for Fallout New Vegas, I am able to write to the process' memory directly at runtime through a .dll plugin that's loaded by the NVSE injector. But it is not ...
1
vote
2answers
571 views
Does the loader fill the IAT table of an .exe in load time by checking the corresponding export tables or during run time?
I came upon this question :
Can we hook the Nt or Zw functions using IAT hooking, or just inline hooking?
and it got me wondering, lets say for some reason some function was not in the IAT of our ...
3
votes
2answers
583 views
In reverse engineering, what does it mean to "patch a file"?
I've been solving some crackmes, and every file that I download, in the "instructions" says: "Patching is obviously not allowed". What does that mean? And how does one patch a file?
1
vote
1answer
137 views
Hex editing a program to change variable types
For starters guys please don't get mad at me because I really googled this question for a while and couldn't find a satisfying answer. Also if I'm asking an idiotic question, I apologize beforehand.
...
1
vote
0answers
602 views
How to export to *.so file after patching in ghidra
I'm using ghidra to patch an *.so file in the Android APK.
While exporting the patched file from ghidra, using the "Export program" option from the "File" menu, it don't have *.so in the supported "...
0
votes
0answers
62 views
Output address path during .exe execution
I have an obfuscated software. I'm a beginner in this area, so I don't find where a patch would be useful for what I want to do.
It turns out that I have an idea of how I could find out in which ...
2
votes
1answer
103 views
How to write sequence of machine code in radare2?
I know how to write an opcode and how to increment and decrement machine code using plus and minus keys. However, how do I write a sequence of machine code at an offset?
E.g. if I want to write five ...
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votes
1answer
157 views
Defence against cracking [closed]
Say I wrote an application and published demo version of it with a possibility to buy a full version. I was wondering if it is possible to stop people from cracking it, so that the only ones who use ...
3
votes
0answers
82 views
Any way to edit an ELF binary without hex? [duplicate]
So, this is a noob question, I am a complete beginner in this field, so sorry if I'm wasting your time in any way.
I wanted to know, if there is a way to edit an ELF binary without using a hex editor....
0
votes
1answer
72 views
Is it possible to change a signed byte to an int in compiled assembly code?
I'm trying to mess around with an old game and I want to reposition a UI element.
I found the address of where the x and y position get set (It's set to an X position of 90 and a Y position of 358) ...
0
votes
1answer
183 views
Is it possible to add a label to an ELF executable and then call that label? If so, how?
Let's say we have this simple "hello world" nasm code that will be compiled to an ELF executable:
global main
section .data
message db "Hello World!", 0x00
section .text
main:
call ...
1
vote
0answers
92 views
How to patch JNI library to call functions on Linux
According to this post it is possible to run functions inside a shared library so long as they do not have a dependency on the JVM
It works by patching the .dynamic ELF section to remove ...
2
votes
0answers
225 views
Patching an app that updates frequently
Hello i am working with an app coded in c# which updates very often usually within 2-3 days or sometimes every 12 hours
The updates are really needed for the app to work
So i was wondering what can i ...
0
votes
0answers
1k views
Assemble function of IDA Pro not working properly
I am using the Patch Program option of IDA Pro to edit the assembly of a binary at runtime.
When I enter the following instruction:
mov rax, [rsp + 0x48]
I get an "Invalid operand" error from IDA ...
1
vote
0answers
60 views
getting %localappdata% in asm
I have an old windows x86 application that no longer works properly since windows 8. This app creates files within its own folders for things like app settings. Unfortunately, Microsoft no longer ...
0
votes
1answer
122 views
immediate value change when start debugging
I patch the code for my work. I have a problem with code patching.
I use IDA pro 6.8.
I added code like this.
(Assembly) (Hex dump)
mov eax, 638BACh --> B8 AC 8B 63 00
Not problem ...