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@ -1,32 +1,38 @@
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#define NOMINMAX
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#include <Windows.h>
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#include <Windows.h>
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#include <filesystem>
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#include <filesystem>
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#include <fstream>
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#include <fstream>
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#include <iostream>
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#include <iostream>
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#include <vtil/vtil>
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#include <ZydisExportConfig.h>
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#include <cli-parser.hpp>
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#include <cli-parser.hpp>
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#include <vmp2.hpp>
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#include <vmp2.hpp>
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#include <vmprofiler.hpp>
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#include <vmprofiler.hpp>
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#include <xtils.hpp>
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#include <xtils.hpp>
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#include <ZydisExportConfig.h>
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#define ABS_TO_IMG( addr, mod_base, img_base ) ( addr - mod_base ) + img_base
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int __cdecl main( int argc, const char *argv[] )
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int __cdecl main( int argc, const char *argv[] )
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{
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{
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argparse::argument_parser_t parser( "vmprofiler-cli", "virtual instruction pseudo code generator" );
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argparse::argument_parser_t parser( "vmprofiler-cli", "virtual instruction pseudo code generator" );
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parser.add_argument().names( { "--bin", "--vmpbin" } ).description( "unpacked binary protected with VMProtect 2" );
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parser.add_argument().names( { "--vmentry", "--entry" } ).description( "rva to push prior to a vm_entry" );
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parser.add_argument().name( "--showhandlers" ).description( "show all vm handlers..." );
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parser.add_argument().name( "--showhandler" ).description( "show a specific vm handler given its index..." );
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parser.add_argument().name( "--vmp2file" ).description( "path to .vmp2 file..." );
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parser.add_argument()
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parser.add_argument()
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.names( { "--bin", "--vmpbin" } )
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.name( "--showblockinstrs" )
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.description( "unpacked binary protected with VMProtect 2" )
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.description( "show the virtual instructions of a specific code block..." );
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.required( true );
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parser.add_argument().name( "--showallblocks" ).description( "shows all information for all code blocks..." );
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parser.add_argument()
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parser.add_argument()
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.names( { "--vmentry", "--entry" } )
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.name( "--devirt" )
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.description( "rva to push prior to a vm_entry" )
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.description( "lift to VTIL IR and apply optimizations, then display the output..." );
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.required( true );
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parser.add_argument().name( "--showhandlers" ).description( "show all vm handlers..." );
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parser.enable_help();
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parser.enable_help();
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auto err = parser.parse( argc, argv );
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auto err = parser.parse( argc, argv );
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const auto umtils = xtils::um_t::get_instance();
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if ( err )
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if ( err )
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{
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{
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@ -40,128 +46,242 @@ int __cdecl main( int argc, const char *argv[] )
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return 0;
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return 0;
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}
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}
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if ( parser.exists( "bin" ) && parser.exists( "vmentry" ) )
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{
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if ( !std::filesystem::exists( parser.get< std::string >( "bin" ) ) )
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{
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std::printf( "> path to protected file is invalid... check your cli args...\n" );
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return -1;
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}
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const auto module_base = reinterpret_cast< std::uintptr_t >(
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const auto module_base = reinterpret_cast< std::uintptr_t >(
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LoadLibraryExA( parser.get< std::string >( "bin" ).c_str(), NULL, DONT_RESOLVE_DLL_REFERENCES ) );
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LoadLibraryExA( parser.get< std::string >( "bin" ).c_str(), NULL, DONT_RESOLVE_DLL_REFERENCES ) );
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const auto vm_entry_ptr =
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const auto vm_entry_rva = std::strtoull( parser.get< std::string >( "vmentry" ).c_str(), nullptr, 16 );
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module_base + std::strtoull( parser.get< std::string >( "vmentry" ).c_str(), nullptr, 16 );
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const auto image_base = umtils->image_base( parser.get< std::string >( "bin" ).c_str() );
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const auto image_size = NT_HEADER( module_base )->OptionalHeader.SizeOfImage;
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const auto image_base = xtils::um_t::get_instance()->image_base( parser.get< std::string >( "bin" ).c_str() );
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std::printf( "> module base = 0x%p, image base = 0x%p, image size = 0x%p\n", module_base, image_base,
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image_size );
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zydis_routine_t vm_entry, calc_jmp;
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vm::ctx_t vmctx( module_base, image_base, image_size, vm_entry_rva );
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std::printf( "> vm entry start = 0x%p\n", vm_entry_ptr );
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if ( !vm::util::flatten( vm_entry, vm_entry_ptr ) )
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if ( !vmctx.init() )
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{
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{
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std::printf( "> failed to flatten vm entry...\n" );
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std::printf( "[!] failed to init vm::ctx_t... make sure all cli arguments are correct!\n" );
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return -1;
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return -1;
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}
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}
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vm::util::deobfuscate( vm_entry );
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std::puts( "======================== [vm entry] ========================\n" );
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std::printf( "> flattened vm entry...\n" );
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vm::util::print( vmctx.vm_entry );
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std::printf( "> deobfuscated vm entry...\n" );
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std::puts( "======================== [calc jmp] ========================\n" );
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std::printf( "==================================================================================\n" );
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vm::util::print( vmctx.calc_jmp );
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vm::util::print( vm_entry );
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std::puts( "============================================================\n" );
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std::printf( "> vip advancement = %s\n\n",
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vmctx.exec_type == vmp2::exec_type_t::forward ? "forward" : "backward" );
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if ( !vm::calc_jmp::get( vm_entry, calc_jmp ) )
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if ( parser.exists( "showhandlers" ) )
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{
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{
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std::printf( "> failed to extract calc_jmp from vm_entry...\n" );
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for ( auto idx = 0u; idx < vmctx.vm_handlers.size(); ++idx )
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return -1;
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{
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std::printf( "======================== [%s #%d] ========================\n",
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vmctx.vm_handlers[ idx ].profile ? vmctx.vm_handlers[ idx ].profile->name : "UNK", idx );
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vm::util::print( vmctx.vm_handlers[ idx ].instrs );
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// if there is no imm then there are no transforms...
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if ( !vmctx.vm_handlers[ idx ].imm_size )
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{
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std::puts( "\n" );
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continue;
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}
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}
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vm::util::deobfuscate( calc_jmp );
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std::puts( "======================== [transforms] ========================\n" );
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std::printf( "> calc_jmp extracted from vm_entry... calc_jmp:\n" );
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for ( auto &[ mnemonic, instr ] : vmctx.vm_handlers[ idx ].transforms )
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std::printf( "==================================================================================\n" );
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{
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vm::util::print( calc_jmp );
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if ( instr.mnemonic == ZYDIS_MNEMONIC_INVALID )
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std::printf( "==================================================================================\n" );
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continue;
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const auto vm_handler_table = vm::handler::table::get( vm_entry );
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vm::util::print( instr );
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}
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std::puts( "\n" );
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}
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}
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else if ( parser.exists( "showhandler" ) )
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{
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const auto vm_handler_idx = std::strtoul( parser.get< std::string >( "showhandler" ).c_str(), nullptr, 10 );
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if ( !vm_handler_table )
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if ( vm_handler_idx > 256 )
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{
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{
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std::printf( "> failed to locate vm handler table...\n" );
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std::printf( "> invalid vm handler index... too large...\n" );
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return -1;
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return -1;
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}
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}
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auto advancement = vm::calc_jmp::get_advancement( calc_jmp );
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std::printf( "======================== [%s #%d] ========================\n",
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if ( advancement.has_value() )
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vmctx.vm_handlers[ vm_handler_idx ].profile ? vmctx.vm_handlers[ vm_handler_idx ].profile->name
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std::printf( "> virtual instruction pointer advancement: %s\n",
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: "UNK",
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advancement == vmp2::exec_type_t::forward ? "forward" : "backward" );
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vm_handler_idx );
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else
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std::printf( "> virtual instruction pointer advancement was unable to be parsed!\n" );
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std::printf( "> located vm handler table... at = 0x%p, rva = 0x%p\n", vm_handler_table,
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vm::util::print( vmctx.vm_handlers[ vm_handler_idx ].instrs );
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( reinterpret_cast< std::uintptr_t >( vm_handler_table ) - module_base ) + image_base );
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zydis_decoded_instr_t vm_handler_transform;
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// if there is no imm then there are no transforms...
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if ( !vm::handler::table::get_transform( vm_entry, &vm_handler_transform ) )
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if ( !vmctx.vm_handlers[ vm_handler_idx ].imm_size )
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{
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{
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std::printf( "[!] failed to locate vm handler table entry transformation...\n" );
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std::puts( "\n" );
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return -1;
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return {};
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}
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}
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std::printf( "> vm handler table entries decrypted with = " );
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std::puts( "======================== [transforms] ========================\n" );
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vm::util::print( vm_handler_transform );
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for ( auto &[ mnemonic, instr ] : vmctx.vm_handlers[ vm_handler_idx ].transforms )
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{
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if ( instr.mnemonic == ZYDIS_MNEMONIC_INVALID )
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continue;
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vm::util::print( instr );
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}
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std::puts( "\n" );
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}
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}
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vm_handler_transform.mnemonic = vm::transform::inverse[ vm_handler_transform.mnemonic ];
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if ( !parser.exists( "vmp2file" ) )
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std::printf( "> vm handler table entries encrypted with = " );
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return {};
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vm::util::print( vm_handler_transform );
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std::printf( "==================================================================================\n" );
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std::vector< std::uint8_t > vmp2file;
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std::vector< zydis_decoded_instr_t > vinstr_rva_decrypt_instrs;
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if ( !umtils->open_binary_file( parser.get< std::string >( "vmp2file" ), vmp2file ) )
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if ( !vm::instrs::get_rva_decrypt( vm_entry, vinstr_rva_decrypt_instrs ) )
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{
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{
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std::printf( "[!] failed to get virtual instruction rva decrypt transformations...\n" );
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std::printf( "[!] failed to open vmp2 file...\n" );
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return -1;
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return -1;
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}
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}
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std::printf( "> virtual instruction rva decryption instructions:\n" );
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const auto file_header = reinterpret_cast< vmp2::v3::file_header * >( vmp2file.data() );
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for ( auto &transform : vinstr_rva_decrypt_instrs )
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{
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if ( file_header->version != vmp2::version_t::v3 )
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std::printf( "\t" );
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vm::util::print( transform );
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}
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std::printf( "> virtual instruction rva encryption instructions:\n" );
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if (!vm::transform::inverse_transforms(vinstr_rva_decrypt_instrs))
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{
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{
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std::printf( "> failed to inverse rva encryption instructions...\n" );
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std::printf( "[!] invalid vmp2 file version... this build uses v3...\n" );
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return -1;
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return -1;
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}
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}
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for ( auto &transform : vinstr_rva_decrypt_instrs )
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auto first_block = reinterpret_cast< vmp2::v3::code_block_t * >( reinterpret_cast< std::uintptr_t >( file_header ) +
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file_header->code_block_offset );
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if ( parser.exists( "showallblocks" ) )
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{
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for ( auto [ code_block, code_block_num ] = std::tuple{ first_block, 0u };
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code_block_num < file_header->code_block_count;
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code_block = reinterpret_cast< vmp2::v3::code_block_t * >(
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reinterpret_cast< std::uintptr_t >( code_block ) + code_block->next_block_offset ),
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++code_block_num )
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{
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{
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std::printf( "\t" );
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vm::util::print( transform );
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std::printf( "[code block #%d] begin = 0x%p, virtual instruction count = %d\n", code_block_num,
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ABS_TO_IMG( code_block->vip_begin, file_header->module_base, file_header->image_base ),
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code_block->vinstr_count );
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if ( code_block->jcc.has_jcc )
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std::printf(
|
|
|
|
|
|
|
|
"\tcode block branches to 0x%p and 0x%p\n",
|
|
|
|
|
|
|
|
ABS_TO_IMG( code_block->jcc.block_addr[ 0 ], file_header->module_base, file_header->image_base ),
|
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|
|
|
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|
ABS_TO_IMG( code_block->jcc.block_addr[ 1 ], file_header->module_base, file_header->image_base ) );
|
|
|
|
|
|
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|
}
|
|
|
|
}
|
|
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|
}
|
|
|
|
std::printf( "==================================================================================\n" );
|
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|
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|
|
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|
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|
|
|
std::vector< vm::handler::handler_t > vm_handlers;
|
|
|
|
if ( parser.exists( "devirt" ) )
|
|
|
|
if ( !vm::handler::get_all( module_base, image_base, vm_entry, vm_handler_table, vm_handlers ) )
|
|
|
|
|
|
|
|
{
|
|
|
|
{
|
|
|
|
std::printf( "> failed to get all vm handler meta data...\n" );
|
|
|
|
vtil::basic_block *rtn = nullptr, *first = nullptr;
|
|
|
|
return -1;
|
|
|
|
for ( auto [ code_block, code_block_num ] = std::tuple{ first_block, 0u };
|
|
|
|
|
|
|
|
code_block_num < file_header->code_block_count;
|
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|
code_block = reinterpret_cast< vmp2::v3::code_block_t * >(
|
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|
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|
reinterpret_cast< std::uintptr_t >( code_block ) + code_block->next_block_offset ),
|
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|
|
|
|
|
|
++code_block_num )
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
if ( !rtn )
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
rtn = vtil::basic_block::begin(
|
|
|
|
|
|
|
|
ABS_TO_IMG( code_block->vip_begin, file_header->module_base, file_header->image_base ) );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
else
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
first = rtn;
|
|
|
|
|
|
|
|
|
|
|
|
if ( parser.exists( "showhandlers" ) )
|
|
|
|
rtn =
|
|
|
|
|
|
|
|
rtn->fork( ABS_TO_IMG( code_block->vip_begin, file_header->module_base, file_header->image_base ) );
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
for ( auto idx = 0u; idx < code_block->vinstr_count; ++idx )
|
|
|
|
{
|
|
|
|
{
|
|
|
|
for ( auto idx = 0u; idx < vm_handlers.size(); ++idx )
|
|
|
|
auto vinstr = &code_block->vinstr[ idx ];
|
|
|
|
|
|
|
|
if ( vinstr->mnemonic_t == vm::handler::INVALID )
|
|
|
|
{
|
|
|
|
{
|
|
|
|
auto vm_handler = vm_handlers[ idx ];
|
|
|
|
std::printf( "[WARNING] vm handler #%d is not implimented, the VTIL output may be incorrect!\n",
|
|
|
|
std::printf( "==========[vm handler %s, idx = %d, imm size = %d]========\n",
|
|
|
|
vinstr->opcode );
|
|
|
|
vm_handler.profile ? vm_handler.profile->name : "UNKNOWN", idx, vm_handler.imm_size );
|
|
|
|
rtn->nop();
|
|
|
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
std::printf( "================[vm handler instructions]==============\n" );
|
|
|
|
const auto result = std::find_if(
|
|
|
|
vm::util::print( vm_handler.instrs );
|
|
|
|
vm::lifters::all.begin(), vm::lifters::all.end(),
|
|
|
|
|
|
|
|
[ & ]( vm::lifters::lifter_t *lifter ) -> bool { return lifter->first == vinstr->mnemonic_t; } );
|
|
|
|
|
|
|
|
|
|
|
|
if ( vm_handler.imm_size )
|
|
|
|
if ( result == vm::lifters::all.end() )
|
|
|
|
{
|
|
|
|
{
|
|
|
|
std::printf( "=================[vm handler transforms]===============\n" );
|
|
|
|
std::printf(
|
|
|
|
for ( const auto &[ transform_type, transform ] : vm_handler.transforms )
|
|
|
|
"[WARNING] vm handler #%d lifter is not implimented, the VTIL output may be incorrect!\n",
|
|
|
|
vm::util::print( transform );
|
|
|
|
vinstr->opcode );
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
rtn->nop();
|
|
|
|
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
std::printf( "=======================================================\n\n" );
|
|
|
|
// lift the virtual instruction...
|
|
|
|
|
|
|
|
( *result )->second( rtn, vinstr, code_block );
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
vtil::optimizer::apply_all( first );
|
|
|
|
|
|
|
|
vtil::debug::dump( first );
|
|
|
|
|
|
|
|
return {};
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
if ( parser.exists( "showblockinstrs" ) )
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
const auto block_img_addr = parser.get< std::string >( "showblockinstrs" );
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
for ( auto [ code_block, code_block_num ] = std::tuple{ first_block, 0u };
|
|
|
|
|
|
|
|
code_block_num < file_header->code_block_count;
|
|
|
|
|
|
|
|
code_block = reinterpret_cast< vmp2::v3::code_block_t * >(
|
|
|
|
|
|
|
|
reinterpret_cast< std::uintptr_t >( code_block ) + code_block->next_block_offset ),
|
|
|
|
|
|
|
|
++code_block_num )
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
if ( ABS_TO_IMG( code_block->vip_begin, file_header->module_base, file_header->image_base ) ==
|
|
|
|
|
|
|
|
std::strtoull( block_img_addr.c_str(), nullptr, 16 ) )
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
std::printf( "[code block #%d] begin = 0x%p, virtual instruction count = %d\n", code_block_num,
|
|
|
|
|
|
|
|
ABS_TO_IMG( code_block->vip_begin, file_header->module_base, file_header->image_base ),
|
|
|
|
|
|
|
|
code_block->vinstr_count );
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
std::printf( "> -----------------------------------------------------------------------\n" );
|
|
|
|
|
|
|
|
std::printf( "> opcode | virtual instructions | virtual instruction pointer\n" );
|
|
|
|
|
|
|
|
std::printf( "> -----------------------------------------------------------------------\n" );
|
|
|
|
|
|
|
|
for ( auto idx = 0u; idx < code_block->vinstr_count; ++idx )
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
const auto vinstr = &code_block->vinstr[ idx ];
|
|
|
|
|
|
|
|
const auto vm_profile = vm::handler::get_profile( vinstr->mnemonic_t );
|
|
|
|
|
|
|
|
if ( vinstr->operand.has_imm )
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
std::printf(
|
|
|
|
|
|
|
|
"> %-6x | %-15s %-15p | 0x%p\n", vinstr->opcode, vm_profile ? vm_profile->name : "UNK",
|
|
|
|
|
|
|
|
vinstr->operand.imm.u,
|
|
|
|
|
|
|
|
ABS_TO_IMG( vinstr->trace_data.vip, file_header->module_base, file_header->image_base ) );
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
else
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
std::printf(
|
|
|
|
|
|
|
|
"> %-6x | %-32s | 0x%p\n", vinstr->opcode, vm_profile ? vm_profile->name : "UNK",
|
|
|
|
|
|
|
|
ABS_TO_IMG( vinstr->trace_data.vip, file_header->module_base, file_header->image_base ) );
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
std::printf( "> finished...\n" );
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
_xeroxz
4 years ago