DragonCrack

// Author: Juan Sacco
#include "pch.h"
#include <iostream>
#include <chrono>
#include <ctime>
#include <string>
#include <windows.h>
#include <stdio.h>

// Download compiled binary here: https://crackmes.one/static/crackme/5d3052e133c5d444ad3017b9.zip

void press_any_key()
{
	std::string temp;
	std::getline(std::cin, temp);
}

// IsInsideVPC's exception filter
DWORD __forceinline IsInsideVPC_exceptionFilter(LPEXCEPTION_POINTERS ep)
{
	PCONTEXT ctx = ep->ContextRecord;

	ctx->Ebx = -1; // Not running VPC
	ctx->Eip += 4; // skip past the "call VPC" opcodes
	return EXCEPTION_CONTINUE_EXECUTION;
	// we can safely resume execution since we skipped faulty instruction
}

// IsInsideVPC()
bool IsInsideVPC()
{
	bool rc = false;

	__try
	{
		_asm push ebx
		_asm mov  ebx, 0 // It will stay ZERO if VPC is running
		_asm mov  eax, 1 // VPC function number

		// call VPC 
		_asm __emit 0Fh
		_asm __emit 3Fh
		_asm __emit 07h
		_asm __emit 0Bh

		_asm test ebx, ebx
		_asm setz[rc]
			_asm pop ebx
	}
	// The except block shouldn't get triggered if VPC is running!!
	__except (IsInsideVPC_exceptionFilter(GetExceptionInformation()))
	{
	}

	return rc;
}

bool IsInsideVMWare()
{
	bool rc = true;

	__try
	{
		__asm
		{
			push   edx
			push   ecx
			push   ebx

			mov    eax, 'VMXh'
			mov    ebx, 0 // any value but not the MAGIC VALUE
			mov    ecx, 10 // get VMWare version
			mov    edx, 'VX' // port number

			in     eax, dx // read port
			   // on return EAX returns the VERSION
			   cmp    ebx, 'VMXh' // is it a reply from VMWare?
			   setz[rc] // set return value

			   pop    ebx
			   pop    ecx
			   pop    edx
		}
	}
	__except (EXCEPTION_EXECUTE_HANDLER)
	{
		rc = false;
	}

	return rc;
}

void checkDebuggerPresent()
{
	BOOL isDebugged = TRUE;
	__try
	{
		// Trap flag is used by every debugger in order to debug a program. Asking for the trap flag a "Second" time will trigger an exception.
		// This approach is similar to the previous one, except that here you enable the
		// trap flag in the current process and check whether an exception is raised or
		//  not. If an exception is not raised, you can assume that a debugger has triggered -
		//  the exception for us, and that the program is being traced.The beauty
		//  of this approach is that it detects every debugger, user mode or kernel mode,
		//  because they all use the trap flag for tracing a program.The following is a sam -
		//  ple implementation of this technique.Again, the code is written in C for the
		//  Microsoft C / C++ compiler.
		__asm
		{
			pushfd
			or dword ptr[esp], 0x100
			popfd

			nop
		}
	}
	__except (EXCEPTION_EXECUTE_HANDLER)
	{
		isDebugged = FALSE;
	}

	if (isDebugged)
	{
		std::cout << "[!] Nice try.. But nope! :-(\n" << std::endl;
		exit(-1);
	}
}

int YouAreDead(std::string reason)
{
	system("CLS");
	printf("You are DEAD. The Dragon has hit you and killed you using %s magic spell!\n\n", reason.c_str());
	std::cout << "LIFE: 0 # SECRET KEY: 0\n\n";
	int msgboxID = MessageBox(
		NULL,
		(LPCWSTR)L"The Dragon has used magic upon you.",
		(LPCWSTR)L"You are DEAD",
		MB_ICONWARNING | MB_DEFBUTTON2
	);

	switch (msgboxID)
	{
	case IDCANCEL:
		// TODO: add code
		break;
	case IDTRYAGAIN:
		// TODO: add code
		break;
	case IDCONTINUE:
		// TODO: add code
		break;
	}

	return msgboxID;
}


int YouWon()
{
	int msgboxID = MessageBox(
		NULL,
		(LPCWSTR)L"You have successfully escaped the DUNGEON. Well done..",
		(LPCWSTR)L"You won",
		MB_ICONINFORMATION | MB_DEFBUTTON2
	);

	switch (msgboxID)
	{
	case IDCANCEL:
		// TODO: add code
		break;
	case IDTRYAGAIN:
		// TODO: add code
		break;
	case IDCONTINUE:
		// TODO: add code
		break;
	}

	return msgboxID;
}

bool IsHWBreakpointExists()
{
	// This structure is key to the function and is the 
	CONTEXT ctx;
	ZeroMemory(&ctx, sizeof(CONTEXT));

	// The CONTEXT structure is an in/out parameter therefore we have
	// to set the flags so Get/SetThreadContext knows what to set or get.   
	ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;

	// Get a handle to our thread
	HANDLE hThread = GetCurrentThread();
	// Get the registers
	if (GetThreadContext(hThread, &ctx) == 0)
		return false;

	if ((ctx.Dr0) || (ctx.Dr1) || (ctx.Dr2) || (ctx.Dr3)) {
		return true;
	}
	else {
		return false;
	}
}


std::string dragon_spell()
{
	const int buffer_size = MAX_COMPUTERNAME_LENGTH + 1;
	char buffer[buffer_size];
	DWORD lpnSize = buffer_size;
	if (GetComputerNameA(buffer, &lpnSize) == FALSE)
		throw std::runtime_error("");
	return std::string{ buffer };
}

const std::string dragonkey = "";
int main()
{
	std::cout << "\n";
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	std::cout << "\n";
	std::cout << "\n";
	std::cout << "\n";
	std::cout << "\n";
	std::cout << "\n";
	std::string serial4("3232-2332-3432-8854-8821");
	std::string serial5("3232-3443-3424-8854-8821");
	std::string serial6("6223-2332-3432-8854-0098");
	std::string serial7("3232-3456-3432-8854-8821");
	std::string serial8("3453-2332-3432-8854-8821");
	std::string serial9("3232-5356-4322-3432-8854");
	std::string serial10("3232-2332-3432-8854-8821");
	std::string serial11("9887-1212-7754-8854-5432");
	std::string serial12("7777-2332-3432-2323-8821");
	std::string serial13("What are you looking at? ;-)");
	std::string serial14("What are you looking at? ;-)");
	std::string serial15("What are you looking at? ;-)");
	std::string serial16("What are you looking at? ;-)");
	std::string serial17("What are you looking at? ;-)");
	std::string serial18("What are you looking at? ;-)");
	std::string serial19("What are you looking at? ;-)");
	std::string serial20("What are you looking at? ;-)");
	std::string serial21("What are you looking at? ;-)");
	std::string serial22("What are you looking at? ;-)");
	std::string serial23("What are you looking at? ;-)");
	std::string serial24("What are you looking at? ;-)");
	std::string serial25("What are you looking at? ;-)");
	std::string serial26("What are you looking at? ;-)");
	std::string serial27("What are you looking at? ;-)");
	std::string serial28("What are you looking at? ;-)");
	std::string serial29("What are you looking at? ;-)");
	std::string serial30("What are you looking at? ;-)");
	std::string serial31("What are you looking at? ;-)");
	std::string serial32("What are you looking at? ;-)");
	std::string serial33("What are you looking at? ;-)");
	std::string serial34("What are you looking at? ;-)");
	std::string serial35("What are you looking at? ;-)");
	std::string serial36("What are you looking at? ;-)");
	std::string serial37("What are you looking at? ;-)");
	std::string serial38("What are you looking at? ;-)");
	std::string serial39("What are you looking at? ;-)");
	std::string serial40("What are you looking at? ;-)");
	std::string serial41("What are you looking at? ;-)");
	std::string serial42("What are you looking at? ;-)");
	std::string serial43("What are you looking at? ;-)");
	std::string serial44("What are you looking at? ;-)");
	std::string serial45("What are you looking at? ;-)");
	std::string serial46("What are you looking at? ;-)");
	std::string serial47("What are you looking at? ;-)");
	std::string serial48("What are you looking at? ;-)");
	std::string serial49("What are you looking at? ;-)");
	std::string serial50("What are you looking at? ;-)");
	std::string serial51("What are you looking at? ;-)");
	std::string serial52("What are you looking at? ;-)");
	std::string serial53("What are you looking at? ;-)");
	std::string serial54("What are you looking at? ;-)");
	std::string serial55("What are you looking at? ;-)");
	std::string serial56("What are you looking at? ;-)");
	std::string serial57("What are you looking at? ;-)");
	std::string serial58("What are you looking at? ;-)");
	std::string serial59("What are you looking at? ;-)");
	std::string serial60("What are you looking at? ;-)");
	std::string serial61("What are you looking at? ;-)");
	std::string serial62("What are you looking at? ;-)");
	std::string serial63("What are you looking at? ;-)");
	std::string serial64("What are you looking at? ;-)");
	std::string serial65("What are you looking at? ;-)");
	std::string serial66("What are you looking at? ;-)");
	std::string serial67("What are you looking at? ;-)");
	std::string serial68("What are you looking at? ;-)");
	std::string serial69("What are you looking at? ;-)");
	std::string serial70("What are you looking at? ;-)");
	std::string serial71("What are you looking at? ;-)");
	std::string serial72("What are you looking at? ;-)");
	std::string serial73("What are you looking at? ;-)");
	std::string serial74("What are you looking at? ;-)");
	std::string serial75("What are you looking at? ;-)");
	std::string serial76("What are you looking at? ;-)");
	std::string serial77("What are you looking at? ;-)");
	std::string serial78("What are you looking at? ;-)");
	IsHWBreakpointExists();
	system("CLS");
	std::cout << "##############################################################################################\n";
	std::cout << "Welcome to a CrackRPG Game. Escape the Dungeon and retrieve the secret key from the Dragon.\n";
	std::cout << "To defeat this game you need to crack the secret key and avoid all the spells casted upon you!\n\n ";
	std::cout << "Rules: Patching is not allowed\n";
	std::cout << " Author: Juan Sacco\n";
	std::cout << "##############################################################################################\n\n";
	std::cout << "Press ENTER to continue..";
	press_any_key();
	system("CLS");
	int key = 0;
	std::string user_choice("");	
	std::cout << "Shall I pick a character's race, role, gender and alignment for you? [y/n] ";
	press_any_key();
	system("CLS");
	std::cout << "Your answer: [YES] ;-) Good choice. \n";
	std::cout << "You are now a chaotic female orcish Barbarian with gender dysphoria. You are lucky! Full moon tonight.\n\n";
	std::cout << "Press ENTER to start your journey! \n"; 
	press_any_key();
	system("CLS");
	std::cout << "It is written in the red book: ";
	std::cout << "\"I am not going to run or escape from my destiny\"\n\n";
	std::cout << "    After the Creation, the cruel god rebelled against the authority of the Dragon\n";
	std::cout << "    and stole from him the most powerful of all artifacts of the gods.\n\n";
	std::cout << "    The power of this artifact can only be released with a secret key. \n\n";
	std::cout << "    You are destined to recover the key, or die in the attempt.\n";
	std::cout << "    You, a newly trained Tenderfoot, have heralded from birth as the instrument of cracking.\n\n";
	std::cout << "The secret key must be recovered from the dungeon! Can you defeat the DRAGON and recover it?\n\n";
	std::cout << "Press ENTER to start your adventure. \n";
	press_any_key();
	system("CLS");
	std::cout << "You are standing at the end of a road before a small brick building\n";
	std::cout << "Around you is a forest. A small house is ahead of you.\n\n\n";
	std::cout << "LIFE: 100 ~ SECRET KEY: 0\n\n";
	std::cout << "ACTIONS: [ENTER THE HOUSE] ";
	press_any_key();
	system("CLS");
	std::cout << "You enter the house and you see a bed, a chair and a desk\n";
	std::cout << "On the desk there is a parchment with some weird text written on it.\n\n\n";
	std::cout << "LIFE: 100 ~ SECRET KEY: 0\n\n";
	std::cout << "ACTIONS: [READ THE PARCHMENT ] [LEAVE THE HOUSE] ";
	press_any_key();
	system("CLS");
	std::cout << "These are the secret words of Kruma repeat them to summon the DRAGON\n";
	std::cout << "Beware adventurer this will cost you some blood\n";
	std::cout << "The magic spell shows these words: \"Ramna Nanarakak Oal\"\n\n\n";
	std::cout << "LIFE: 100 ~ SECRET KEY: 0\n\n";
	std::cout << "ACTIONS: [RANMA NANARAKAK OAL] ";
	press_any_key();
	system("CLS");
	std::cout << "A mighty DRAGON appears in front of you and hit you with a SPELL\n";
	std::cout << "You are now pretified and you feel something warm going down your pants.\n\n\n";
	std::cout << "LIFE: 50 ~ SECRET KEY: 0\n\n";
	std::cout << "ACTIONS: [FIGHT] [COWARDLY RUN AWAY] ";
	press_any_key();
	if (IsDebuggerPresent())
	{
		YouAreDead("IsDebuggerPresent()");
		exit(0);
	}
	system("CLS");
	std::cout << "You hit the DRAGON with all your strenght and he falls, droping a key, but before dying he hits you for a last time!\n";
	std::cout << "Next to you a small glowing box appears\n\n\n";
	std::cout << "LIFE: 50 ~ SECRET KEY: 0\n\n";
	std::cout << "ACTIONS: [GRAB KEY] ";
	press_any_key();
	if (IsInsideVMWare || IsInsideVPC)
	{
		YouAreDead("VMDetection()");
		checkDebuggerPresent();
		IsHWBreakpointExists();
		exit(0);
	}
	system("CLS");
	key = 1;
	std::cout << "Next to you a small glowing box appears, inside the secret of cracking it's awaiting\n\n\n";
	std::cout << "LIFE: 50 ~ SECRET KEY: 1\n\n";
	std::cout << "ACTIONS: [USE KEY] ";
	press_any_key();
	system("CLS");
	std::cout << "You are about to use your key to escape the dungeon!\n\n\n";
	std::cout << "LIFE: 50 ~ SECRET KEY: 1\n\n";
	std::cout << "Please type the secret key: ";
	std::string secret_key("");
	std::cin >> secret_key;
	std::string dragonkey = dragon_spell();
	if (secret_key == dragonkey) {
			system("CLS");
			std::cout << "You have defeated the DRAGON!\n\n\n";
			std::cout << "LIFE: 50 ~ SECRET KEY: 1\n\n";
			YouWon();
			press_any_key();
	} else{
		system("CLS");
		std::cout << "Your key has no magic! The chest explodes and you die.\n\n\n";
		std::cout << "LIFE: 0 ~ SECRET KEY: 1\n\n";
		press_any_key();
	}
}