Questions tagged [dll]

Dynamic-link library, or DLL, is Microsoft's implementation of the shared library concept in the Microsoft Windows and OS/2 operating systems.

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Help Needed reversing a function inside a DLL [closed]

I have a broken installation of Metalogix Archive Manager (MAM). Sometimes, I need to go and retrieve attachments that this has archived when it was previously working. The original attachment name ...
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dnSpy - What do these symbols mean?

When decompiling a dll file there are certain lines of code that read like this: return \u0013.\u0002.\u0001(url, info); I have two questions on this: 1) does \u00xx mean that it is obfuscated, if ...
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Reverse engineering IE thick client

Internet Explorer allows for creating thick clients that run in the browser via a Browser Helper Object (BHO). In trying to reverse one such thick client I noticed that the website downloads about ...
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1answer
501 views

identifying function prototype from dll

I have an exe file and a dll file. This exe file uses the dll to decode input file. This exe file is gui based and does not support command line execution. So my requirement is to create a program ...
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1answer
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Decompile a DLL file from Microsoft Media Creation Tool

In this Superuser topic Windows 10 Media Creation Tool, how does it work?, it is possible to extract the URL from SetupMgr.dll. My question is, how do I extract this URL from SetupMgr.dll? I want to ...
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Dumping dll out of process

So there is executable malware, what when opened downloads dll from server or so and injects into target process. I checked properties of the target process in process hacker and clicked on .NET ...
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479 views

How to build a 32-bit DLL in pure assembly

This is the code I've managed to build so far to implement DLLSkeleton.dll: http://archive.org/download/lowlevelDLL32_try0000/x86_WinAPI_ASM_PE_EXE_Skeleton32--v2017-07-26.zip I'm trying to make a ...
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1answer
242 views

Returning value from faux DLL

A bit of background; I'm trying to inject my own code into the old game SimTower with the ultimate goal of reverse engineering it in the same way that OpenRCT2 was created. Since SimTower is ...
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1answer
351 views

Solving method of DLL crackme

I was given two DLL files (link) . The task is to get the flag from them. First what I've done - opened the first file (called original) in IDA and found the function called _GetFlag. As I understood,...
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326 views

See how classes are used in a Unity 3D game [closed]

I'm trying to understand how the procedural generation in a particular Unity 3D game works. I do not have the source code/project file, just a windows build. I've opened up a dll called Assembly-...
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4answers
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Unpacking xamarin mono dll from libmonodroid_bundle.app.so

I have an apk that was written in xamarin. The meta data suggests there are lots of dlls files this application uses. I found a file called libmonodroid_bundle_app.so which when disassembled in IDA ...
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185 views

Bypass DLL by returning correct values? Or alternative technique

If this is the wrong spot for this, or is a duplicate, let me know. I'm a computer professional getting started with decompiling and reverse engineering just for fun and resume building. I have a ...
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How can I dynamically debug a malicious DLL? [duplicate]

English isn't my first language, So I will do my best ) I am trying to analyze some malware NotPetya and I can run the malware by running : rundll32.exe notpetya.dll #1 I am using Olly and trying ...
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2answers
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How to edit and modify a class with ILSpy + Reflexil

In the Maxsea.SmartDesktop.dll, I want to edit and modify class b1g. There is this in : if (isCrackedResult != null && isCrackedResult.IsCracked) and I want to modify for this : if (...
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2answers
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How to do Global DLL injection

How can one go about injection of a DLL into every process? Can SetwindowsHookEx() do the trick? Does AppInit_DLLs work as it used to?
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DLL Injection does not work twice

I created a program that performs DLL injection. It does that by opening the process with OpenProcess, writes the DLL path to the process and creates a remote thread with CreateRemoteThread with the ...
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680 views

How to debug DLL injection in IDA?

Recently, I've been cracking a crackme DLL, and I need to inject it into a process, to see if it worked. However, I've ran into a problem. I cannot seem to find how to debug DLL injection inside of ...
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Finding other segments of a manually mapped DLL having found the .text segment

I've been able to locate the .text section of the module, knowing the base address of that section and its size how would I be able to find the other segments of the DLL, like .rdata, .data, .bss, etc....
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2answers
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Reverse Engineering visual basics programs

I am a beginner and I am doing a few crackme stuff, I'm pretty okay when it comes to system calls such as user32. But there is one crackme which uses msvbvm50.dll (Visual Basic) and it has weird ...
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871 views

Debug a .dll file within powershell

I have given a .ps1 file which loads a .dll via: Import-Module ".\decrypter.dll" After that, a call to that module is performed by: get-decrypt(" *Some Base64 Encoded string* ") Only the .dll is ...
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1answer
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Detect a process for being injected with a dll [duplicate]

I'm trying to figure out how can I detect a process for being injected with a dll. I found this thread but I couldn't figure out a simple way out of it. I want to clarify my intention: given a pid - ...
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3answers
843 views

How to locate dynamic instructions?

I am trying to make a game hack and there are a few instructions I need to get the addresses of to nop out. However, when looking at the instructions in Cheat Engine, they do not have a static offset ...
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How to run and reconstruct a packed DLL in IDA Pro?

I have a packed DLL. It has an entry point. If I call LoadLibrary it gets unpacked with the entry point code. Then I can attach a debugger to the .exe that called LoadLibrary and see the unpacked dll ...
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1answer
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Call DLL export in OllyDBG

I am using OllyDbg 2.01 and I walked through this tutorial to figure out how Call DLL export works. Even though it was written for another version of OllyDBG it work just fine. We should notice, that ...
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2answers
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Can I know which function from which dll was called at runtime?

I'm new to reverse engineering, I want to find out which command in the Source2 Engine's console invokes which function (and in which DLL). For that, I was wondering how can I know: which functions ...
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Modifying Windows DLLs

I find myself playing in strange territory lately, venturing far outside my comfort zone to test some theories. At present I want to return True every time a specific program calls IsDebuggerPresent, ...
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1answer
323 views

What is the quickest way to run code of my own DLL?

Not sure if the title is that telling but what I want to do is hack into an executable and do as little as necessary to get the code from my DLL running since I want to write as few lines of assembly ...
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Am I seeing this dll's innards correctly? [closed]

The dll in question is custom, from a retail/consumer software package that was first offered for sale in 2006/2007. I am fairly confident that it was compiled with Visual Studio .NET (2003). My ...
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Patch packed DLL by themida [closed]

How to patch dll file packed by themida? I've dumped the unpacked file and patched it. But the program didn't recognize the unpacked dll. The original file and dumped file have ~8mb different size. I ...
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2answers
539 views

Is there a tool for proxying a dll that doesn't require IDA Pro?

I found a github project that compiled cleanly on the first try (might be the first ever for me, yay!). No instructions, so I stumble around for a bit until I find an awful Youtube video... everything'...
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1answer
601 views

How do I call a statically imported function from a Dll? call dword ptr ds <> not working

Disclaimer: I am relatively new to this whole RE thing. So I successfully crammed some instructions into the end of an existing DLL and redirected a call. Now I actually want to do things with a ...
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4answers
2k views

Locate address of function in DLL

I need to locate the address of a function in a DLL at runtime which isn't exported. The DLL in question is vbe7.dll related to Visual Basic (and macros). The function is ___vbaInStr, can be found in ...
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Call function of injected dll

I am messing around with dll injections. I am able to inject a dll with an exported function into some process, but I have a question now: Is there a standard way to call the exported function of my ...
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2answers
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IDA python, get address range of specific dll

I have the following IDA Python script. It is intended to break on first instruction of imported function when call comes from the module of interest: list = [] def set_cb(ea, name, ord): global ...
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1answer
520 views

OllyDbg can't set permanent breakpoint

I am relatively new to the world of RE. So, I am playing with a program, which relies on multiple dlls. I am using 32 bit OllyDbg 2.01, and can’t put permanent breakpoints in one dll, others are fine, ...
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IDA Pro list COM methods

I have a dll file, containing some exported functions and COM methods. Here is my dll information opened by DLL Export Viewer: But when i open the dll file in ida pro, i see just exported functions ...
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MSDetour not detouring SHGetKnownFolderPath

Tried to hook SHGetKnownFolderPath from shell32, using the normal DetourFunctionWithTrampoline, and it could not. Investigating, it seen that the application use GetProcAddress to load the function, ...
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2answers
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How to quickly distinguish PE/DLL/DOS-MZ files based on magic numbers?

I know that the specifications of the Microsoft PE/DLL/DOS-MZ files states that the two first bytes of a PE/DLL/DOS-MZ file is MZ (0x4d,0x5a) orZM(0x5a,0x4d`). The problem with such a small signature ...
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2answers
324 views

how to get hanging instructions of a dll using IDApython

I need to get hanging instructions i.e instructions which are not under any functions in a dll through idapython script? it is available in brown color when seen through IDA pro.
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Segments start address is different in IDApython when invoked thrg cmd prompt

I am able to get Segments start address, end address and all functions of a DLL through follwoing ida python script: # Get the segment's starting address ea = ScreenEA() print(ea) print(...
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245 views

Wierd names in import table

I'm trying to do a static analysis of a PE file to see what it does. While doing so, I stumbled upon some really wierd function names in my objdump DLL Name: msvcrt.dll vma: Hint/Ord Member-Name ...
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Field that is never assigned? [closed]

I am reversing a DLL insied a Unity game with .NET Reflector, and I found some weird fields. They are never assinged, there was no item under the Assigned by while there were some items under the Used ...
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Where can be assembly-csharp.dll decrypted?

So I have an android game. Its Assembly-CSharp.dll causes .NET Reflector to show File is not a portable executable. DOS header does not contain 'MZ' signature It's encrypted. The app seems to ...
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Issue decompiling c# method

I'm trying to decompile a c# dll and on a particular method I'm getting this result public IEnumerable<Guid> GetDbIdentifiers(int classId) { switch ((794999935 == 794999935) ? 1 : 0) { ...
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369 views

Question of analysing function of DLL and write program to call it [closed]

I have a customized DLL in a large software. The DLL compress/decompress image files. I need to use the DLL separately to get my important images back to decompressed version. I can see its function ...
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Reverse Engineering a whole project desktop application

Friends: i am trying to reverse engineer a CMS desktop application with the objective to make another with better functionallity; that CMS application contains 32 Dll´s; the idea is instead of create ...
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1answer
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How to intercept a call to function with known name from known DLL

First of all I wasn't very much into reversing until now, so excuse me if my question is dumb. I have a windows DLL most likely made with Visual C++. It's been developed in 1998 and has Mfc42.dll (4....
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Get DLL from EXE file [duplicate]

I am trying to reverse engineer an DLL that is loaded from a EXE. I don't have the DLL file. I just have an executable file that injects the DLL into a certain process. When I try using ollydbg or ...
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2answers
2k views

Editing a string in a native dll

Can anyone help me edit a string in a native dll? When I try to open the dll in CFF explorer or other similar tools, I can't see the string table, probably because it's hidden somehow. The DLL in ...
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IDA Pro 64 bit disassembly error for system DLLs

I use IDA Pro 6.8.150428 (idaq64.exe) to disassemble system dlls (64 bit) e.g. ntdll.dll, kernel32.dll, etc. in Windows 10 64 bit. I found idaq64.exe correctly disassembling 64 bit sample applications ...