Questions tagged [windows]

Windows refers to the Microsoft Windows series of operating systems.

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S30+ Game Development

How can I get started developing games for the S30+ operating system on Windows or Linux? I have a new nokia 150, which seems to run the correct operating system, although I'm not sure if this phone ...
Kynemix's user avatar
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How to hook or call "non-native/non-exported functions"?

I wrote this simple application in C++ to learn about reverse engineering: #include <iostream> #include <windows.h> void PrintMessage(const char *message) { std::cout << message ...
Unknown X's user avatar
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How to trigger calls and attach to functions on a running process?

I'm a software developer, with some knowledge in memory management but near zero experience in reverse engineering. I wonder if there is a way to detect which function a program calls at certain ...
Unknown X's user avatar
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How to draw invisible entities (glow) with DX11?

I'm trying to understand how GLOW hacks work. In some games like CSGO you can just overwrite the memory address to 1 and glow chams are enabled. So you can see people through the walls like in this ...
kuhi's user avatar
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How does Windows determine dll address when using loadlibrary

First, sorry for my bad english. I'm trying to make emulator to emulating PE binary with unicorn emulator. My goal is place every dll in emulator that PE needed and hook some specific APIs. What I am ...
schnabel's user avatar
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GetProcAddress on NTDLL functions not working via ROP

This is somewhat convoluted, but I will try to focus on the heart of the issue. We are trying to do GetProcAddress on a few NTDLL functions, and it is not working. We are doing this via ROP and in a ...
vg1925's user avatar
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How to get decryption keys from an offline player?

I am just starting to learn reverse engineering from lena lectures. I have 2 encrypted sample vids and an offline player which is able to decrypt the videos and play them, is there any way,I can get ...
No One In particular's user avatar
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1 answer
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Why are these strings padded every other byte?

I've seen this multiple times, through various apps and snooping of hex values. Character strings but every other value is actually a null byte. This particular example is with API Monitor, but I'm ...
Katastic Voyage's user avatar
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How to embed PE files to another PE files

So what I want to do basically is what BDFproxy does on the go, I want to modify a file (on the disk) to embed another PE in it and have both working, it does not matter if they work concurrently or ...
LuckyCoder3607's user avatar
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Windows kernel Dev

I'm writing a basic program that'd allow me to list the running processes on a windows system but by simply trying to go through the ActiveProcessLinks of the _EPROCESS structure.The problem I'm ...
Essole's user avatar
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Microsoft Teams web client: how does Teams knows if a device is allowed or not

In my company I am able to use Ms Teams only inside windows but when I try from a Virtual machine (Hyper-V) running linux it says that this device is not allowed. So how can the Teams Server knows ...
Vince Ricosti's user avatar
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trying to understand how Redboot ransomware works

this sample is able to drop exes though I'm not sure how the report indicates it calls CreateFileW though changing the call's outcome doesn't work is Redboot using heaven's gate (or another technique) ...
ALsec's user avatar
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Is it possible to run Ida pro in a docker container?

I've got a script that runs IDA pro on a file, the problem is that I need to run that script in a windows docker container. I've got the script working fine, but I can't get the program to run in the ...
Anthony's user avatar
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1 answer
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reverse engineer a 32bit windows executable for a password that unlocks secret message

I need to find a password to access the secret: ❯ strings -n 10 win32.exe !Tip: Ida Free can decompile to c++! .rdata$voltmd .rdata$zzzdbg Bad password length! Wrong password! Congratulations! The ...
schnitzel's user avatar
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How can I find the part of cmd.exe that processes windows batch commands before they're executed?

I'm able to find the ReadConsoleInputW commands for pause and reading input for commands but I'm unable to find the actual processing of the commands. I'm using x64dbg but I'm fairly new to Reverse ...
user19244091's user avatar
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Executable Opcodes of Windows Image File Seem Offset from My Calculations

Background: I'm trying to manually disassemble a practice executable file for practice. https://github.com/stryker2k2/dbg-demo/blob/master/assem/assem_0x00.asm Issue: When I take a look at what I ...
Liam Hanrahan's user avatar
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How do I modify Windows 98's "SETUP.EXE" file?

I'm currently trying to make a mod of Windows 98. I successfully modified the autorun.exe file, but now, I'm trying to edit setup.exe, and I've run into some problems. I first tried it in Resource ...
TOWF's user avatar
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1 answer
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Unix system with windows-style registry

When trying to determine the filesystem of a firmware image using binwalk, I encountered a strange combination. The binwalk is returning a lot of Unix paths, but some of them contain a typical windows-...
Suske Lambik's user avatar
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Windows boot sequence operation

I am targeting at creating software for the Windows pre-boot environment but I have hard time finding conclusive information about how it operates. For background: this software will communicate with ...
Claude's user avatar
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Audio problem rushing?

After using a new Pc for some time, suddendly a problem with the Audio occured. While listening music with Headphones, some rushing noise appeared. I tried to narrow down the problem : Checking the ...
Jack's user avatar
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How to convert variable to struct member in IDA?

I'm working on a windows program which is walking PEB Ldr list. the related types are as follows: struct LDR_DATA_TABLE_ENTRY { LIST_ENTRY InLoadOrderLinks; // offset = 0, size = 0x10 ...
H3d9's user avatar
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Exe self-modifies strings searched in debugger

I'm studying a Windows binary file and while searching for some string I noticed the EXE modifies the searched string, e.g., if I search "This is a string", it's modified to "his is a ...
lopan's user avatar
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Need help understanding why Netflix prevents me from downloading with VPN

When using Netflix via the Windows desktop app with a VPN, streaming movies works fine but downloading does not. The download gets automatically paused, and after a minute it shows error code DL1-...
Verpous's user avatar
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from executable to assembly source code?

let's say i have an ".exe program" and i want to disassemble it and get "disassembled code" . my question is => can i maintain and organize that "disassembled code" ...
0x00001F's user avatar
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3 answers
269 views

how to stop windbg when register value changes

I'm using windbg to find the memory of a specific structure in windows. The way is to look at certain values stored in stack and registers in entry function. I notice that register ax holds that value ...
anonymous bear's user avatar
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1 answer
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unable to figure out how a windbg extension work

I'm trying to figure out how the below windbg extension works !ndiskd.nbl addr -hexcap(or -data) kd> !ndiskd.nbl ffffce8c96bde070 -hexcap # NET_BUFFER_LIST ffffce8c96bde070 # NET_BUFFER ...
anonymous bear's user avatar
1 vote
0 answers
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Process stuck on the entry point

I'm trying to patch an old game (1998-ish) that runs on windows 95 and windows XP to make it compatible with windows 11. The current problem with it is that when running the exe file nothing seems to ...
Yair Derry's user avatar
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1 answer
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Tool to analyze .obj files (not COFF) created with /LTCG

This Microsoft article states that: When building with LTCG, the compiler front end doesn't invoke the back end. Instead, it emits an OBJ file with IL in it. It bears repeating: this IL is not the ...
langlauf.io's user avatar
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Pe file import binding

I'm learning a bit about PE files. The thing I've struggling a bit now it the First Thunk and Original First Thunk fields. To understand the difference between them I've read this post and that ...
Daros911's user avatar
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windbg fail to load symbol with UNC store

I'm debugging a qemu windows machine in docker and the windbg shows the file is missing. Windbg is attached to qemu kd> .sympath Symbol search path is: srv* Expanded Symbol search path is: cache*;...
anonymous bear's user avatar
1 vote
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Where can I find the files from Ghidra symbol tree?

I have decompiled a .dll file with Ghidra. At the left, I see the symbol tree. In the symbol tree, there is a tab imports. This tab contains external .dll files. Where can I find the location of these ...
Riemann's user avatar
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2 votes
2 answers
251 views

How can I find the buffer of CryptGenRandom?

I am trying to analyze the CryptGenRandom algorithm on my Windows 10 laptop. According to Niels Ferguson's Whitepaper called 'The Windows 10 random number generation infrastructure', the ...
Riemann's user avatar
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1 vote
0 answers
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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 ...
Daros911's user avatar
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How can I make a quick tracer for a PE file?

INTRODUCTION: I made my tracer on the event debug loop, but after I compared its speed characteristics with the same PinTool or similar tools, I realized that my tracer is several dozen times slower ...
Swoke's user avatar
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Firmware not attached to WinDBG while debugging Windows boot process

I'm attempting to reproduce the cve-2022-21894 poc for educational purposes, however I'm getting stuck at the "hvloader" phase. The debugger cannot attach to the boot process. Short ...
gergeerew's user avatar
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0 answers
91 views

How to inject (a lot of) code into a running program?

I've seen a number of tutorials on changing several binary digits of an executable, like changing assembly je to jn. But what I want to add new functionalities. #include <iostream> #include <...
Gqqnbig's user avatar
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Windows Library description number

Windows Libraries that engage in Library Hijacking, typically have a number in their library description field. What is this field? How does Windows Process it and is there a mapping of int32-like ...
melsk's user avatar
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1 vote
0 answers
88 views

Windbg command .call usage and syntax

I'm using Windbg to track all functions that could result in the blue screen errors. My method is to call certain suspects manually through windbg .call command. However, I always got syntax error. ...
anonymous bear's user avatar
1 vote
2 answers
222 views

Identifying file-access functions used by explorer.exe

I'm trying to write a Windows 10 64-bit rootkit that runs on userland and hides files using IAT hooking. I managed to accomplish that on cmd.exe by hooking FindFirstFileW and FindNextFileW imported ...
one_hell_of_a_guy's user avatar
2 votes
1 answer
313 views

Marking DAT section as shellcode in ghidra

I have a binary that loads a DAT section as code (calls ((code **) DAT_something)(0, 2)), and I'd like to be able to disassemble the DAT_something data region. Currently, when looking at the ...
0x150's user avatar
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1 vote
1 answer
676 views

How can I extract the password from an installer/self-extracting archive?

I have an installer/self-extracting archive. The executable file has an embedded ZIP archive into it (like many other installers). The ZIP archive is encrypted with a password. The installer DOES NOT ...
ARGYROU MINAS's user avatar
2 votes
1 answer
144 views

What triggers RIP_EVENT?

The documentation for the Windows Debugger API mentions a debug event called RIP_EVENT. It offers little explanation of what a RIP_EVENT is, only stating that the structure "contains the error ...
tomysshadow's user avatar
1 vote
1 answer
81 views

Should shell32.dll be in executable search path for winword.exe with WinDBG?

I'm threat hunting and I'm curious if there should be a shell32.dll in the executable search path in windbg for winword.exe.
Invulnerable Immortal's user avatar
1 vote
0 answers
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How to develop an anti-debug library which allow users to debug their own programs but not the library?

I'm going to publish a library which guarded by anti-debug ,(ptrace_trackme for Linux and isDebuggerPresent for windows). The down side of this library is: users would be abled to debug their own ...
prgbenz's user avatar
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2 votes
0 answers
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i want to know how to tracing a exe's http responses and log them

I want to "crack" this cheat loader protected by thermedia and I had someone do it before but lost contact with them and, now I would like to learn to do it myself. and they said a basic way ...
od8m's user avatar
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2 votes
0 answers
95 views

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
29 views

How is the language of a font glyph determined?

A glyph holds data such as its name and contour points. But how do you determine where the characters of one language end and another begins? Is there a written standard that says language X starts at ...
user3208218's user avatar
4 votes
1 answer
137 views

Replacing a function in a 1995 Windows 32-bit binary using Frida causes crash

I am working with a 1995 Windows 32-bit binary compiled with Watcom, which uses the Watcom calling convention. I am trying to replace a simple string length calculation function in the binary using ...
Cesar Canassa's user avatar
4 votes
2 answers
277 views

Malware analysis - Debugger hangs at HttpSendRequestA

I'm reverse engineering a malware that at some point tries to connect to http://api.ipify.org in order to get the IP address of the infected PC. I was able to replicate this behaviour with a small ...
Luca D'Amico's user avatar
5 votes
1 answer
207 views

Replace a function in a Windows 32-bit binary with a custom C function

I am reverse engineering a Windows game from 1995 using Ghidra, and I'm currently documenting all the decompiled functions. My goal is to replace a function in the original binary with a custom C ...
Cesar Canassa's user avatar

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