c - Error when writing to memory from DLL -

-

I am trying to change my MessageBox display to a program. I will apply a DLL injection And trying to jump on my DLL with the MessageBox function which causes my MessageBox to be displayed instead of regular one. / P>

I have written the following code which also writes the address of MessageBox and my message box in memory, I'm trying to calculate the Opododes I have to prepare already but unfortunately every time I inject DLL, I get the " Access violation " error, here is the code: 

  DWORD OldProtect; PVOID MessageboxArc = GetModuleHandle ("User32.dll"), "Messagebox A"); PVID Message BoxHooksAuthor = & amp; Hookedmessage box; DWORD relJmp = (DWORD) messagebox assistant- ((DWORD) message box hooked + 5); Virtual Protote (Message Box Assistant, Size (BYTE) * 5, PAGE_EXECUTE_READWRITE, and Older Preserve); // This line precedes the small Debian method and is caused by error (PBETE Messagebox Assistant) [0] = 0xe9; (PBETE messaging) [1] = relJmp ^ 0x000000ff; (PBETE messboxbox) [2] = (relJmp ^ 0x0000ff00) & gt; & Gt; 8; (PBETE messaging) [3] = (relJmp ^ 0x00ff0000) & gt; & Gt; 16; (PBETE messaging) [4] = (relJmp ^ 0xff000000) & gt; & Gt; 24; Virtual Protocol (Message Box Assistant, Size (BYTE) * 5, PAGE_EXECUTE_READ, and Older Protected); Return 0;     
 
 
 In a user 32, a function like  MessageBox  is not. Dll 
 
  messagebox  is actually a macro that determines whether the preprocessor is based on either the  MessageBoxA  or  MessageBoxW  Flag  Unicode  is set. 
 
 So you can either target  MessageBoxA  or  MessageBoxW , but  GetProcAddress (.., "MessageBox"  ) Will return  NULL ,  VirtualProtect  >  NULL  is trying to change the usage of the page on the pointer and that is why you have a Access violation is occurring. 
 
 Alternatively, you may want to use the Microsoft Detours library instead of rolling your own code.

Comments

Post a Comment

Popular posts from this blog

java - org.apache.http.ProtocolException: Target host is not specified -

-
I have written a simple httprequest / response code and I am getting this error below: I used to type in my classpath httpclient, httpcore, common -Codecs and general logging. I am very new to Java and I do not know what's going on here. Please help me. code: import org.apache.http.client.HttpClient; Import org.apache.http.client.methods.HttpGet; Import org.apache.http.HttpResponse; Import org.apache.http.impl.client.HttpClientBuilder; Import org.apache.http.Header; Import org.apache.http.HttpHeaders; Public class UnshorteningUrl {public static zero main (string [] args throws exception {HttpGet request = zero; HTTP Client Client = HTTP ClientBuilder.credit (). Build (); Try {Request = New HTTP Gate ("trib.me/1lBFzSi"); HttpResponse httpResponse = client.execute (request); Header [] header = httpResponse.getHeaders (HttpHeaders.LOCATION); // Preconditions.checkState (headers.length == 1); String new url = header [0] .getValue (); System.out.println ("new url...
Read more

java - Gradle dependencies: compile project by relative path -

-
Is it possible to specify a dependency on another gradeal project in the granular (in android studios) outside the current project limits? For example, with a relative path like this: dependence {collection project ('../../ stdlib / dagger'}} MyApp (path / user / foo / workspace / mypad) The app (Path / User / Foo / Workspace / MyPass / App) And I have an Android Library Project with 3 subdomules: stdlib (path is / user / foo / Utilities (Path / User / Foo / Workspace / Stadlib / Utilis) http (Path / User / Foo / Workspace / Stadlib / HT) / Li> What I have to do is compile the Dagger, Util, http module in the MyApp project. The Stidelib Library module under heavy development And MyApp will grow in the form of Growth, so I do not want to push them into a Mewen repository. I am a little change. is likely to add another Gredle projects in some way? I will push the study library into the Maven repository after the source is in search of a temp...
Read more

ruby on rails - Object doesn't support #inspect when used with .include -

-
So I have participated in a glitch error that I do not even know how to debug. I am very new to the railing, so it has kicked my ass well when I use the .includes (school) seen by the student, it gives a blue box error, But when I look at any other model and .includes (school) , the school works just fine. class student & lt; ActiveRecord :: Base has has_many: relationships, foreign_key: "liker_id", dependent :: has_many: matches, foreign_key: "student_1_id", dependent :: deleted belong_to: school belong_to: conference belong_to: would_you_rather belong_to: home city belong_to: year is_to: Major and class school & lt; on the console activatecord :: Affiliate for the base: conference includes: respondent, class: "school", foreign_key: "rival_id" (e.g. For: School) Select SQL generated Select "School". * "School" from "school" "ID" IN (1) error message back NoMethodError: u...
Read more