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#include <cli-parser.hpp>
#include <fstream>
#include <iostream>
#include <thread>
#include "vmemu_t.hpp"
#define NUM_THREADS 20
int __cdecl main(int argc, const char* argv[]) {
argparse::argument_parser_t parser("VMEmu",
"VMProtect 3 VM Handler Emulator");
parser.add_argument()
.name("--vmentry")
.description("relative virtual address to a vm entry...");
parser.add_argument()
.name("--bin")
.description("path to unpacked virtualized binary...")
.required(true);
parser.add_argument()
.name("--out")
.description("output file name...")
.required(true);
parser.add_argument().name("--unpack").description("unpack a vmp2 binary...");
parser.add_argument()
.names({"-f", "--force"})
.description("force emulation of unknown vm handlers...");
parser.add_argument()
.name("--emuall")
.description(
"scan for all vm enters and trace all of them... this may take a few "
"minutes...");
parser.enable_help();
auto result = parser.parse(argc, argv);
if (result) {
std::printf("[!] error parsing commandline arguments... reason = %s\n",
result.what().c_str());
return -1;
}
if (parser.exists("help")) {
parser.print_help();
return 0;
}
vm::util::init();
std::vector<std::uint8_t> module_data, tmp, unpacked_bin;
if (!vm::util::open_binary_file(parser.get<std::string>("bin"),
module_data)) {
std::printf("[!] failed to open binary file...\n");
return -1;
}
auto img = reinterpret_cast<win::image_t<>*>(module_data.data());
auto image_size = img->get_nt_headers()->optional_header.size_image;
const auto image_base = img->get_nt_headers()->optional_header.image_base;
// page align the vector allocation so that unicorn-engine is happy girl...
tmp.resize(image_size + PAGE_4KB);
const std::uintptr_t module_base =
reinterpret_cast<std::uintptr_t>(tmp.data()) +
(PAGE_4KB - (reinterpret_cast<std::uintptr_t>(tmp.data()) & 0xFFFull));
std::memcpy((void*)module_base, module_data.data(), 0x1000);
std::for_each(img->get_nt_headers()->get_sections(),
img->get_nt_headers()->get_sections() +
img->get_nt_headers()->file_header.num_sections,
[&](const auto& section_header) {
std::memcpy(
(void*)(module_base + section_header.virtual_address),
module_data.data() + section_header.ptr_raw_data,
section_header.size_raw_data);
});
auto win_img = reinterpret_cast<win::image_t<>*>(module_base);
auto basereloc_dir =
win_img->get_directory(win::directory_id::directory_entry_basereloc);
auto reloc_dir = reinterpret_cast<win::reloc_directory_t*>(
basereloc_dir->rva + module_base);
win::reloc_block_t* reloc_block = &reloc_dir->first_block;
// apply relocations to all sections...
while (reloc_block->base_rva && reloc_block->size_block) {
std::for_each(reloc_block->begin(), reloc_block->end(),
[&](win::reloc_entry_t& entry) {
switch (entry.type) {
case win::reloc_type_id::rel_based_dir64: {
auto reloc_at = reinterpret_cast<std::uintptr_t*>(
entry.offset + reloc_block->base_rva + module_base);
*reloc_at = module_base + ((*reloc_at) - image_base);
break;
}
default:
break;
}
});
reloc_block = reloc_block->next();
}
std::printf("> image base = %p, image size = %p, module base = %p\n",
image_base, image_size, module_base);
if (!image_base || !image_size || !module_base) {
std::printf("[!] failed to open binary on disk...\n");
return -1;
}
if (parser.exists("vmentry")) {
const auto vm_entry_rva =
std::strtoull(parser.get<std::string>("vmentry").c_str(), nullptr, 16);
std::vector<vm::instrs::code_block_t> code_blocks;
vm::ctx_t vmctx(module_base, image_base, image_size, vm_entry_rva);
if (!vmctx.init()) {
std::printf(
"[!] failed to init vmctx... this can be for many reasons..."
" try validating your vm entry rva... make sure the binary is "
"unpacked and is"
"protected with VMProtect 2...\n");
return -1;
}
vm::util::print(vmctx.vm_entry);
}
}