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momo5502
parent
e761a12d8c
commit
92312dcf2f
@ -434,8 +434,12 @@ namespace arxan
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return false;
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}
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bool ignore = false;
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void protect_texts()
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{
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if(ignore) return;
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const auto& texts = get_text_sections();
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for (const auto& text : texts)
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{
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@ -517,134 +521,134 @@ namespace arxan
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}
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uint32_t adjust_integrity_checksum(const uint64_t return_address, uint8_t* stack_frame, bool type)
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{
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if(type)
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uint32_t adjust_integrity_checksum(const uint64_t return_address, uint8_t* stack_frame, bool type)
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{
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if (type)
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{
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OutputDebugStringA("Type1");
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}else
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{
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OutputDebugStringA("Type2");
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OutputDebugStringA("Type1");
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}
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// MessageBoxA(0, "III", 0, 0);
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const auto handler_address = return_address - 5;
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const auto handler = integrity_handlers.at(handler_address);
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const auto* context = reinterpret_cast<integrity_handler_context*>(stack_frame + handler.frame_offset);
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if (*context->computed_checksum != *context->original_checksum)
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{
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OutputDebugStringA("Patching checksum :3");
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}
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else
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{
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OutputDebugStringA("Not patching");
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}
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*context->computed_checksum = *context->original_checksum;
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return *context->original_checksum;
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}
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void patch_integrity_check(const integrity_handler_data& handler)
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{
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OutputDebugStringA(utils::string::va("Patching: %llX", handler.address));
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const auto game_address = operator"" _g(handler.address);
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constexpr auto inst_len = 3; // mov [rdx+rcx*4], eax
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const auto next_inst_addr = game_address + inst_len;
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const auto next_inst = *reinterpret_cast<uint32_t*>(next_inst_addr);
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// Basicblock is intact
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if ((next_inst & 0xFF00FFFF) == 0xFF004583)
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{
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const uint8_t other_frame_offset = next_inst >> 16;
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static const auto stub = utils::hook::assemble([](utils::hook::assembler& a)
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else
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{
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a.mov(rax, qword_ptr(rsp));
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a.sub(rax, 2); // Skip the push we inserted
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OutputDebugStringA("Type2");
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}
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// MessageBoxA(0, "III", 0, 0);
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const auto handler_address = return_address - 5;
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const auto handler = integrity_handlers.at(handler_address);
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a.push(rax);
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a.pushad64();
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const auto* context = reinterpret_cast<integrity_handler_context*>(stack_frame + handler.frame_offset);
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a.mov(r8, 0);
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a.mov(rcx, rax);
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a.mov(rdx, rbp);
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a.call_aligned(adjust_integrity_checksum);
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a.mov(qword_ptr(rsp, 0x80), rax);
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a.popad64();
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a.pop(rax);
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a.mov(dword_ptr(rdx, rcx, 4), eax);
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a.pop(rax); // return addr
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a.xchg(rax, qword_ptr(rsp)); // switch with push
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a.add(dword_ptr(rbp, rax), 0xFFFFFFFF);
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a.mov(rax, dword_ptr(rdx, rcx, 4)); // restore rax
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a.ret();
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});
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utils::hook::set<uint16_t>(game_address, 0x6A | (other_frame_offset << 8)); // push other_frame_offset
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utils::hook::call(game_address + 2, stub);
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}
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else if (*(uint8_t*)next_inst_addr == 0xE9)
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{
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const auto jump_target = utils::hook::extract<void*>(reinterpret_cast<void*>(next_inst_addr + 1));
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const auto stub = utils::hook::assemble([jump_target](utils::hook::assembler& a)
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if (*context->computed_checksum != *context->original_checksum)
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{
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a.mov(rax, qword_ptr(rsp));
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OutputDebugStringA("Patching checksum :3");
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}
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else
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{
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OutputDebugStringA("Not patching");
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}
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a.push(rax);
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a.pushad64();
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a.mov(r8, 1);
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a.mov(rcx, rax);
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a.mov(rdx, rbp);
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a.call_aligned(adjust_integrity_checksum);
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a.mov(qword_ptr(rsp, 0x80), rax);
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a.popad64();
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a.pop(rax);
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a.mov(dword_ptr(rdx, rcx, 4), eax);
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a.add(rsp, 8);
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a.jmp(jump_target);
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});
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utils::hook::call(game_address, stub);
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*context->computed_checksum = *context->original_checksum;
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return *context->original_checksum;
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}
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else
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void patch_integrity_check(const integrity_handler_data& handler)
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{
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OutputDebugStringA(utils::string::va("Unknown :( %llX", game_address));
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}
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OutputDebugStringA(utils::string::va("Patching: %llX", handler.address));
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const auto game_address = operator"" _g(handler.address);
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constexpr auto inst_len = 3; // mov [rdx+rcx*4], eax
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const auto next_inst_addr = game_address + inst_len;
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const auto next_inst = *reinterpret_cast<uint32_t*>(next_inst_addr);
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// Basicblock is intact
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if ((next_inst & 0xFF00FFFF) == 0xFF004583)
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{
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const uint8_t other_frame_offset = next_inst >> 16;
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static const auto stub = utils::hook::assemble([](utils::hook::assembler& a)
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{
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a.mov(rax, qword_ptr(rsp));
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a.sub(rax, 2); // Skip the push we inserted
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a.push(rax);
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a.pushad64();
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a.mov(r8, 0);
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a.mov(rcx, rax);
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a.mov(rdx, rbp);
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a.call_aligned(adjust_integrity_checksum);
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a.mov(qword_ptr(rsp, 0x80), rax);
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a.popad64();
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a.pop(rax);
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a.mov(dword_ptr(rdx, rcx, 4), eax);
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a.pop(rax); // return addr
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a.xchg(rax, qword_ptr(rsp)); // switch with push
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a.add(dword_ptr(rbp, rax), 0xFFFFFFFF);
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a.mov(rax, dword_ptr(rdx, rcx, 4)); // restore rax
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a.ret();
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});
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utils::hook::set<uint16_t>(game_address, 0x6A | (other_frame_offset << 8)); // push other_frame_offset
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utils::hook::call(game_address + 2, stub);
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}
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else if (*(uint8_t*)next_inst_addr == 0xE9)
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{
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const auto jump_target = utils::hook::extract<void*>(reinterpret_cast<void*>(next_inst_addr + 1));
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const auto stub = utils::hook::assemble([jump_target](utils::hook::assembler& a)
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{
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a.mov(rax, qword_ptr(rsp));
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a.push(rax);
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a.pushad64();
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a.mov(r8, 1);
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a.mov(rcx, rax);
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a.mov(rdx, rbp);
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a.call_aligned(adjust_integrity_checksum);
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a.mov(qword_ptr(rsp, 0x80), rax);
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a.popad64();
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a.pop(rax);
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a.mov(dword_ptr(rdx, rcx, 4), eax);
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a.add(rsp, 8);
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a.jmp(jump_target);
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});
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utils::hook::call(game_address, stub);
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}
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else
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{
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OutputDebugStringA(utils::string::va("Unknown :( %llX", game_address));
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}
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OutputDebugStringA(utils::string::va("Patching done: %llX", handler.address));
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}
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void patch_integrity_checks()
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{
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load_handlers();
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//utils::thread::suspend_other_threads();
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for (const auto& handler : integrity_handlers)
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{
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patch_integrity_check(handler.second);
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// break;
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}
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OutputDebugStringA("Done patching");
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//utils::thread::resume_other_threads();
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}
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void patch_integrity_checks()
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{
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load_handlers();
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//utils::thread::suspend_other_threads();
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for (const auto& handler : integrity_handlers)
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{
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patch_integrity_check(handler.second);
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// break;
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}
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OutputDebugStringA("Done patching");
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//utils::thread::resume_other_threads();
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}
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LONG WINAPI exception_filter(const LPEXCEPTION_POINTERS info)
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{
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@ -1085,11 +1089,22 @@ namespace arxan
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MessageBoxA(0, "done", 0, 0);
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*/
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std::thread([]()
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{
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MessageBoxA(0, 0, 0, 0);
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protect_texts();
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protect_texts();
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patch_integrity_checks();
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while (true)
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{
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MessageBoxA(0, "Remove guard", 0, 0);
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ignore = true;
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unprotect_texts();
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MessageBoxA(0, "Apply guard", 0, 0);
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ignore = false;
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protect_texts();
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}
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//verify_handlers();
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/*utils::hook::set<uint8_t>(0x1423339C0_g, 0xC3);
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