Questions tagged [patching]
Patching is the process of adding or deleting code from an executable file in order to modify its functioning.
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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 ...
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Updating legacy library in an already compiled binary
I'm dealing with a reverse engineering challenge involving a binary application that was statically compiled with a legacy library. While the legacy library is not vulnerable, it lacks certain ...
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X64dbg question
I got a program that I try to patch. Normally you get a message box or something to get at the right point in program. But this program behaves else. It opens, then you can type in your license number ...
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Inject a MessageBox to the PE file
I'd like to patch some Windows PE file to show just simple MessageBox. Taking into account that the PE in question doesn't import the MessageBoxA function if I'm right that all i need to do is to add ...
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Need Help Figuring out Multi-byte (in-memory) byte replacement using ida script (idc)
"I am trying to create a simple IDC script for IDA 7.7, which takes a known memory address (in the format 0x00000000), a string of replacement bytes (either in the format ffffffff or ff ff ff ff, ...
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How to patch instruction with a call to a thunk function?
I started to use ghidra to begin doing some crackmes, and I need to change an instruction to a call to a thunk function. However, when I export the program back, I get a segfault.
Inspecting it with ...
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How does Windows Updates determine if the patches are compatible?
I am looking into Microsoft Windows updates, and how they are applied, after extracting the .msu file, we get some .cab files with patches (in PA30 format), and informations on the file attributes, ...
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Finding a check in Chrome
Chrome doesn't allow switching on extensions which are not from the Chrome store.
There is no this limitation in Chromium. So it is only in Chrome.
It checks verified_contents.json (in which content ...
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How can I create a patch to insert a menu into an executable file which does not have a menu? [duplicate]
I need help writing a patch that inserts a menu into an application which does not have one. When I an executable file in a resource editor, I found the menu and I saved the file again and it doesn't ...
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IDA binary patch "has no file mapping"
I am trying to change one byte (TBZ to TBNZ) inside a ~40mb binary. Ive done this multiple times with other files but this time IDA is giving me a hard time by simply not patching and printing this to ...
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Patched Mac application throws "Invalid value of (null) for entitlement" when running it
I have patched a specific application that I downloaded from the app store but when I ran the executable, it gave me a signal kill 9. I also reverted back the change I made, but the same error was ...
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How to prevent dynamic loader from modifying binary in memory?
I have patched a loadable object (an .so file) from this:
xor eax,0x304b7c0
to this:
mov eax,0x0
When I try to run my binary with these modifications, the application loads the .so file and then it ...
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Under what circumstances relative to instr rip+offsets to .rdata data may not match?
I have a 100Mb binary file, in which I need to find and patch specific bytes in a function. When disassembled in IDA, this function is the only thing that ever references on unique ASCII string via ...
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Patching a B(ranch) causes segfault in ARMv7 binary, while the same patch (with JMP) works on x64 binary
Any ideas why trying to patch a ARMv7 binary causes a segfault while basically the same patch on the Win64 version of the software works as expected?
Here is the Win64 version, that works
UPX0:...
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291
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Hex editing an IP address of a different length
I am performing some Windows malware research on a rogue AV software called SpySheriff (password: infected). I want to edit the IP address within the PE (.exe) file to change it to my honeypot IP ...
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Patching out relative calls to DLL functions
I have googled, watched several videos, read the PE spec, and even read some blogs. I am at a loss on how to patch out a message box. I am working through a CTF whose first task is to disable a nag ...
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Changing the jne to je instruction causes program to generate error
I'm trying to change the instruction from jne to je
I've change an instruction
75 0c jne [some_location]
75 0c is a 2 jump instruction.
So, I've a chaged it to from 75 0c to 74 0c which is ...
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How to patch bootstrap in NAND flash?
I read the layout or my NAND flash and saw that in the beginning of flash there is a bootstrap the the CPU load. That flash has ECC
I read/write that flash.
How can I analyze the bootstrap and change ...
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ApplyPatches to input file via IDC
Anybody know, how via IDC scripts applying patching for input file (i mean context menu: "Edit - Patch program - Apply patches to input file"). I viewed entire idc.idc and didn't see desired ...
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IDA/Olly changing address bytes after patch during debugging on x86
I'm struggling with a patch in an x86 .exe. I replaced a MOV with a JMP but everytime I run the debugger, the address gets modified as a sort of rebasing:
BE E4732201 MOV ESI,App.012273E4
should ...
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Patching Jar File (2022)
Currently reversing a .jar program recreationally, and I understand the workflow proposed here:
https://www.netspi.com/blog/technical/thick-application-penetration-testing/patching-java-executables-...
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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?
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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 ...
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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-...
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2
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138
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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 ...
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586
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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 ...
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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 ...
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363
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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. ...
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556
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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 ...
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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 ...
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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 ...
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281
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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 ...
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303
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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 ...
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212
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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 ...
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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-...
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130
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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 ...
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151
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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 ...
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169
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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 ...
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243
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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 ...
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439
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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 ...
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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 ...
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412
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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 ...
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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 ...
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1
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98
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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. ...
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383
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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.
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713
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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
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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 ...
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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 ...
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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?
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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?
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