Utility For Inspecting Mac Drives Under Windows Xp

UTILITY FOR INSPECTING DRIVES UNDER WINDOWS XP CODE BELOW SHOWS

Cracks were noticed on the back walls of buildings (around the windows). Click the USB drive and click Erase tab > select NTFS under Format pull-down menuAGRICULTURE MINISTER INSPECTS MFCs AND HANDOVER SEEDS TO SEED GROWERS IN CRR/S. Click Applications > Utilities > Disk Utility, it will show all internal and removable disk on your Mac computer. Connect the USB thumb drive to Mac computer and install a NTFS driver on the computer.

IsDebuggerPresentPerhaps the simplest anti-debugging method is calling the IsDebuggerPresent function. We wonвЂ™t consider different theories of software protection, only practical examples. This article presents popular anti-debugging techniques, starting from the simplest, and notes how to bypass them. The main goal of various anti-reverse engineering techniques is simply to complicate the process as much as possible.The best way to be prepared for an attack is to know where one could come from. We should mention right at the beginning that it's impossible to completely protect software from being reverse engineered.

Utility For Inspecting Drives Under Windows Xp Code Below Shows

The PEB structure also includes the NtGlobalFlag field, and its bit structure does not correspond to the NtGlobalFlag global system variable. The variable flags are undocumented, but the SDK includes the gflags utility, which allows you to edit a global flag value. At boot, the NtGlobalFlag global system variable is initialized with the value from the system registry key: This variable value is used for system tracing, debugging, and control. The code below shows an example of elementary protection:VOID NTAnopPI TlsCallback(PVOID DllHandle, DWORD Reason, VOID Reserved)Var = 0xB15BADB0 // Required for TLS Callback callMessageBoxA(NULL, 'Stop debugging program!', 'Error', MB_OK | MB_ICONERROR) TerminateProcess(GetCurrentProcess(), 0xBABEFACE) _declspec(allocate('.CRT$XLY'))PIMAGE_TLS_CALLBACK g_tlsCallback = TlsCallback In Windows NT, there's a set of flags that are stored in the global variable NtGlobalFlag, which is common for the whole system.

This structure has the GlobalFlagsClear field, which indicates which flags of the NtGlobalFlag field of the PEB structure should be reset. This structure is not built into an executable by default, but it can be added using a patch. NtGlobalFlag and IMAGE_LOAD_CONFIG_DIRECTORYThe executable can include the IMAGE_LOAD_CONFIG_DIRECTORY structure, which contains additional configuration parameters for the system loader.

Obviously, these field values should be redefined before the heap flag check. Heap Flags and ForceFlagsThe PEB structure contains a pointer to the process heap (the _HEAP structure):IsVistaOrHigher() ? 0x70 : 0x14: //x64 offsetsIsVistaOrHigher() ? 0x40 : 0x0C //x86 offsetsIsVistaOrHigher() ? 0x74 : 0x18: //x64 offsetsIsVistaOrHigher() ? 0x44 : 0x10 //x86 offsetsPDWORD heapFlagsPtr = 0, heapForceFlagsPtr = 0 Heap = (PVOID)*(PDWORD_PTR)((PBYTE)pPeb + offsetProcessHeap) HeapFlagsPtr = (PDWORD)((PBYTE)heap + GetHeapFlagsOffset(x64)) HeapForceFlagsPtr = (PDWORD)((PBYTE)heap + GetHeapForceFlagsOffset(x64)) Heap = (PVOID)*(PDWORD_PTR)((PBYTE)pPeb64 + 0x30) HeapFlagsPtr = (PDWORD)((PBYTE)heap + GetHeapFlagsOffset(true)) HeapForceFlagsPtr = (PDWORD)((PBYTE)heap + GetHeapForceFlagsOffset(true)) How to bypass the Heap Flags and ForceFlags checksTo bypass anti-debugging protection based on the heap flag check, set the HEAP_GROWABLE flag for the Flags field as well as the value of the ForceFlags field to 0. The CheckGlobalFlagsClearInFile function performs the same check but for the executable on the disk. If this value is not 0, then the process is likely being debugged. The code example below checks the GlobalFlagsClear field in the memory of the running process and on the disk thus illustrating one of the popular anti debugging techniques:PIMAGE_NT_HEADERS GetImageNtHeaders(PBYTE pImageBase)PIMAGE_DOS_HEADER pImageDosHeader = (PIMAGE_DOS_HEADER)pImageBase Return (PIMAGE_NT_HEADERS)(pImageBase + pImageDosHeader->e_lfanew) PIMAGE_SECTION_HEADER FindRDataSection(PBYTE pImageBase)Static const std::string rdata = '.rdata' PIMAGE_NT_HEADERS pImageNtHeaders = GetImageNtHeaders(pImageBase) PIMAGE_SECTION_HEADER pImageSectionHeader = IMAGE_FIRST_SECTION(pImageNtHeaders) For ( n FileHeader.NumberOfSections ++n)If (rdata = (char*)pImageSectionHeader.Name)PBYTE pImageBase = (PBYTE)GetModuleHandle(NULL) PIMAGE_LOAD_CONFIG_DIRECTORY pImageLoadConfigDirectory = (PIMAGE_LOAD_CONFIG_DIRECTORY)(pImageBase+ pImageNtHeaders->OptionalHeader.DataDirectory.VirtualAddress) If (pImageLoadConfigDirectory->GlobalFlagsClear != 0)Std::cout PointerToRawData + pImageSectionHeader->SizeOfRawData) PIMAGE_NT_HEADERS pImageNtHeaders = GetImageNtHeaders(pMappedImageBase) PIMAGE_LOAD_CONFIG_DIRECTORY pImageLoadConfigDirectory = (PIMAGE_LOAD_CONFIG_DIRECTORY)(pMappedImageBase+ (pImageNtHeaders->OptionalHeader.DataDirectory.VirtualAddress - pImageSectionHeader->VirtualAddress))) In this code sample, the CheckGlobalFlagsClearInProcess function finds the PIMAGE_LOAD_CONFIG_DIRECTORY structure by the loading address of the currently running process and checks the value of the GlobalFlagsClear field.

The following anti-debugging example is based on the TF setting and exception call check:Or dword ptr, 0x100 // set the Trap FlagPopfd // Load the value into EFLAGS register// If an exception has been raised вЂ“ debugger is not presentHere TF is intentionally set to generate an exception. If TF is set to 1, the CPU will generate INT 01h, or the 'Single Step' exception after each instruction execution.

Utility For Inspecting Mac Drives Under Windows Xp