_xeroxz
3 years ago
parent
419f0c8778
commit
44e1817460
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#include "scn.hpp"
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namespace scn
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{
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bool read_only(u64 image_base, u64 ptr)
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{
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auto dos_header = reinterpret_cast<PIMAGE_DOS_HEADER>(image_base);
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auto nt_header = reinterpret_cast<PIMAGE_NT_HEADERS64>(
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reinterpret_cast<u64>(dos_header) + dos_header->e_lfanew);
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auto section_count = nt_header->FileHeader.NumberOfSections;
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auto sections = reinterpret_cast<PIMAGE_SECTION_HEADER>(
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reinterpret_cast<u64>(nt_header) + sizeof(u32) + sizeof(IMAGE_FILE_HEADER) +
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nt_header->FileHeader.SizeOfOptionalHeader);
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// for each section try and find the section that contains this pointer...
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for (auto idx = 0u; idx < section_count; ++idx)
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// if the section contains this pointer...
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if (ptr >= sections[idx].VirtualAddress + image_base &&
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ptr < sections[idx].VirtualAddress + image_base + sections[idx].Misc.VirtualSize)
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// returns true if the section isnt discardable and isnt writeable (I.E in memory and readonly)...
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return !(sections[idx].Characteristics & IMAGE_SCN_MEM_DISCARDABLE) &&
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!(sections[idx].Characteristics & IMAGE_SCN_MEM_WRITE);
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// pointer isnt inside of the driver...
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return false;
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}
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}
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@ -0,0 +1,121 @@
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#pragma once
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#include <ntifs.h>
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#include <intrin.h>
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#include <vmhook.hpp>
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#define IMAGE_SCN_MEM_DISCARDABLE 0x02000000
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#define IMAGE_SCN_MEM_WRITE 0x80000000
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namespace scn
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{
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typedef struct _IMAGE_DOS_HEADER
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{
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/* 0x0000 */ unsigned short e_magic;
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/* 0x0002 */ unsigned short e_cblp;
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/* 0x0004 */ unsigned short e_cp;
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/* 0x0006 */ unsigned short e_crlc;
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/* 0x0008 */ unsigned short e_cparhdr;
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/* 0x000a */ unsigned short e_minalloc;
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/* 0x000c */ unsigned short e_maxalloc;
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/* 0x000e */ unsigned short e_ss;
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/* 0x0010 */ unsigned short e_sp;
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/* 0x0012 */ unsigned short e_csum;
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/* 0x0014 */ unsigned short e_ip;
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/* 0x0016 */ unsigned short e_cs;
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/* 0x0018 */ unsigned short e_lfarlc;
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/* 0x001a */ unsigned short e_ovno;
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/* 0x001c */ unsigned short e_res[4];
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/* 0x0024 */ unsigned short e_oemid;
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/* 0x0026 */ unsigned short e_oeminfo;
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/* 0x0028 */ unsigned short e_res2[10];
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/* 0x003c */ long e_lfanew;
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} IMAGE_DOS_HEADER, * PIMAGE_DOS_HEADER; /* size: 0x0040 */
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typedef struct _IMAGE_FILE_HEADER
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{
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/* 0x0000 */ unsigned short Machine;
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/* 0x0002 */ unsigned short NumberOfSections;
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/* 0x0004 */ unsigned long TimeDateStamp;
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/* 0x0008 */ unsigned long PointerToSymbolTable;
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/* 0x000c */ unsigned long NumberOfSymbols;
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/* 0x0010 */ unsigned short SizeOfOptionalHeader;
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/* 0x0012 */ unsigned short Characteristics;
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} IMAGE_FILE_HEADER, * PIMAGE_FILE_HEADER; /* size: 0x0014 */
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typedef struct _IMAGE_DATA_DIRECTORY
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{
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/* 0x0000 */ unsigned long VirtualAddress;
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/* 0x0004 */ unsigned long Size;
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} IMAGE_DATA_DIRECTORY, * PIMAGE_DATA_DIRECTORY; /* size: 0x0008 */
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typedef struct _IMAGE_OPTIONAL_HEADER64
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{
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/* 0x0000 */ unsigned short Magic;
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/* 0x0002 */ unsigned char MajorLinkerVersion;
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/* 0x0003 */ unsigned char MinorLinkerVersion;
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/* 0x0004 */ unsigned long SizeOfCode;
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/* 0x0008 */ unsigned long SizeOfInitializedData;
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/* 0x000c */ unsigned long SizeOfUninitializedData;
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/* 0x0010 */ unsigned long AddressOfEntryPoint;
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/* 0x0014 */ unsigned long BaseOfCode;
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/* 0x0018 */ unsigned __int64 ImageBase;
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/* 0x0020 */ unsigned long SectionAlignment;
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/* 0x0024 */ unsigned long FileAlignment;
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/* 0x0028 */ unsigned short MajorOperatingSystemVersion;
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/* 0x002a */ unsigned short MinorOperatingSystemVersion;
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/* 0x002c */ unsigned short MajorImageVersion;
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/* 0x002e */ unsigned short MinorImageVersion;
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/* 0x0030 */ unsigned short MajorSubsystemVersion;
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/* 0x0032 */ unsigned short MinorSubsystemVersion;
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/* 0x0034 */ unsigned long Win32VersionValue;
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/* 0x0038 */ unsigned long SizeOfImage;
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/* 0x003c */ unsigned long SizeOfHeaders;
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/* 0x0040 */ unsigned long CheckSum;
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/* 0x0044 */ unsigned short Subsystem;
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/* 0x0046 */ unsigned short DllCharacteristics;
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/* 0x0048 */ unsigned __int64 SizeOfStackReserve;
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/* 0x0050 */ unsigned __int64 SizeOfStackCommit;
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/* 0x0058 */ unsigned __int64 SizeOfHeapReserve;
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/* 0x0060 */ unsigned __int64 SizeOfHeapCommit;
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/* 0x0068 */ unsigned long LoaderFlags;
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/* 0x006c */ unsigned long NumberOfRvaAndSizes;
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/* 0x0070 */ struct _IMAGE_DATA_DIRECTORY DataDirectory[16];
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} IMAGE_OPTIONAL_HEADER64, * PIMAGE_OPTIONAL_HEADER64; /* size: 0x00f0 */
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typedef struct _IMAGE_NT_HEADERS64
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{
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/* 0x0000 */ unsigned long Signature;
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/* 0x0004 */ struct _IMAGE_FILE_HEADER FileHeader;
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/* 0x0018 */ struct _IMAGE_OPTIONAL_HEADER64 OptionalHeader;
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} IMAGE_NT_HEADERS64, * PIMAGE_NT_HEADERS64; /* size: 0x0108 */
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typedef struct _IMAGE_SECTION_HEADER
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{
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/* 0x0000 */ unsigned char Name[8];
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union
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{
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union
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{
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/* 0x0008 */ unsigned long PhysicalAddress;
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/* 0x0008 */ unsigned long VirtualSize;
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}; /* size: 0x0004 */
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} /* size: 0x0004 */ Misc;
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/* 0x000c */ unsigned long VirtualAddress;
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/* 0x0010 */ unsigned long SizeOfRawData;
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/* 0x0014 */ unsigned long PointerToRawData;
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/* 0x0018 */ unsigned long PointerToRelocations;
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/* 0x001c */ unsigned long PointerToLinenumbers;
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/* 0x0020 */ unsigned short NumberOfRelocations;
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/* 0x0022 */ unsigned short NumberOfLinenumbers;
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/* 0x0024 */ unsigned long Characteristics;
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} IMAGE_SECTION_HEADER, * PIMAGE_SECTION_HEADER; /* size: 0x0028 */
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/// <summary>
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/// returns true if the ptr pointers to something in a section
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/// that is read only...
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/// </summary>
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/// <param name="image_base">module base of the driver...</param>
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/// <param name="ptr">a valid pointer that lands inside of the driver...</param>
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/// <returns>returns true if the ptr pointers to something in a section that is read only</returns>
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bool read_only(u64 image_base, u64 ptr);
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}
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@ -0,0 +1,316 @@
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#pragma once
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/*
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SHA-1 in C
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By Steve Reid <steve@edmweb.com>
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100% Public Domain
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*/
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using uint32_t = unsigned int;
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typedef struct _sha1_ctx
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{
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uint32_t state[5];
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uint32_t count[2];
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unsigned char buffer[64];
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} sha1_ctx, * psha1_ctx;
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void sha1_transform(
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uint32_t state[5],
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const unsigned char buffer[64]
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);
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void sha1_init(
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sha1_ctx* context
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);
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void sha1_update(
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sha1_ctx* context,
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const unsigned char* data,
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uint32_t len
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);
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void sha1_final(
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unsigned char digest[20],
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sha1_ctx* context
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);
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void sha1(
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char* hash_out,
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const char* str,
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int len);
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#define SHA1HANDSOFF
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#include <stdio.h>
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#include <string.h>
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#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
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/* blk0() and blk() perform the initial expand. */
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/* I got the idea of expanding during the round function from SSLeay */
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
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|(rol(block->l[i],8)&0x00FF00FF))
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#elif BYTE_ORDER == BIG_ENDIAN
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#define blk0(i) block->l[i]
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#else
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#error "Endianness not defined!"
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#endif
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#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
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^block->l[(i+2)&15]^block->l[i&15],1))
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/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
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#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
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#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
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#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
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#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
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#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
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/* Hash a single 512-bit block. This is the core of the algorithm. */
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void sha1_transform(
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uint32_t state[5],
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const unsigned char buffer[64]
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)
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{
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uint32_t a, b, c, d, e;
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typedef union
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{
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unsigned char c[64];
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uint32_t l[16];
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} CHAR64LONG16;
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#ifdef SHA1HANDSOFF
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CHAR64LONG16 block[1]; /* use array to appear as a pointer */
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memcpy(block, buffer, 64);
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#else
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/* The following had better never be used because it causes the
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* pointer-to-const buffer to be cast into a pointer to non-const.
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* And the result is written through. I threw a "const" in, hoping
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* this will cause a diagnostic.
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*/
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CHAR64LONG16* block = (const CHAR64LONG16*)buffer;
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#endif
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/* Copy context->state[] to working vars */
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a = state[0];
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b = state[1];
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c = state[2];
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d = state[3];
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e = state[4];
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/* 4 rounds of 20 operations each. Loop unrolled. */
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R0(a, b, c, d, e, 0);
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R0(e, a, b, c, d, 1);
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R0(d, e, a, b, c, 2);
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R0(c, d, e, a, b, 3);
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R0(b, c, d, e, a, 4);
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R0(a, b, c, d, e, 5);
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R0(e, a, b, c, d, 6);
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R0(d, e, a, b, c, 7);
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R0(c, d, e, a, b, 8);
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R0(b, c, d, e, a, 9);
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R0(a, b, c, d, e, 10);
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R0(e, a, b, c, d, 11);
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R0(d, e, a, b, c, 12);
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R0(c, d, e, a, b, 13);
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R0(b, c, d, e, a, 14);
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R0(a, b, c, d, e, 15);
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R1(e, a, b, c, d, 16);
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R1(d, e, a, b, c, 17);
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R1(c, d, e, a, b, 18);
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R1(b, c, d, e, a, 19);
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R2(a, b, c, d, e, 20);
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R2(e, a, b, c, d, 21);
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R2(d, e, a, b, c, 22);
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R2(c, d, e, a, b, 23);
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R2(b, c, d, e, a, 24);
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R2(a, b, c, d, e, 25);
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R2(e, a, b, c, d, 26);
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R2(d, e, a, b, c, 27);
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R2(c, d, e, a, b, 28);
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R2(b, c, d, e, a, 29);
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R2(a, b, c, d, e, 30);
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R2(e, a, b, c, d, 31);
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R2(d, e, a, b, c, 32);
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R2(c, d, e, a, b, 33);
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R2(b, c, d, e, a, 34);
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R2(a, b, c, d, e, 35);
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R2(e, a, b, c, d, 36);
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R2(d, e, a, b, c, 37);
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R2(c, d, e, a, b, 38);
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R2(b, c, d, e, a, 39);
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R3(a, b, c, d, e, 40);
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R3(e, a, b, c, d, 41);
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R3(d, e, a, b, c, 42);
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R3(c, d, e, a, b, 43);
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R3(b, c, d, e, a, 44);
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R3(a, b, c, d, e, 45);
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R3(e, a, b, c, d, 46);
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R3(d, e, a, b, c, 47);
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R3(c, d, e, a, b, 48);
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R3(b, c, d, e, a, 49);
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R3(a, b, c, d, e, 50);
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R3(e, a, b, c, d, 51);
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R3(d, e, a, b, c, 52);
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R3(c, d, e, a, b, 53);
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R3(b, c, d, e, a, 54);
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R3(a, b, c, d, e, 55);
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R3(e, a, b, c, d, 56);
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R3(d, e, a, b, c, 57);
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R3(c, d, e, a, b, 58);
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R3(b, c, d, e, a, 59);
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R4(a, b, c, d, e, 60);
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R4(e, a, b, c, d, 61);
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R4(d, e, a, b, c, 62);
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R4(c, d, e, a, b, 63);
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R4(b, c, d, e, a, 64);
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R4(a, b, c, d, e, 65);
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R4(e, a, b, c, d, 66);
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R4(d, e, a, b, c, 67);
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R4(c, d, e, a, b, 68);
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R4(b, c, d, e, a, 69);
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R4(a, b, c, d, e, 70);
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R4(e, a, b, c, d, 71);
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R4(d, e, a, b, c, 72);
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R4(c, d, e, a, b, 73);
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R4(b, c, d, e, a, 74);
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R4(a, b, c, d, e, 75);
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R4(e, a, b, c, d, 76);
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R4(d, e, a, b, c, 77);
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R4(c, d, e, a, b, 78);
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R4(b, c, d, e, a, 79);
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/* Add the working vars back into context.state[] */
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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state[4] += e;
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/* Wipe variables */
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a = b = c = d = e = 0;
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#ifdef SHA1HANDSOFF
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memset(block, '\0', sizeof(block));
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#endif
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}
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/* SHA1Init - Initialize new context */
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void sha1_init(
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sha1_ctx* context
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)
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{
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/* SHA1 initialization constants */
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context->state[0] = 0x67452301;
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context->state[1] = 0xEFCDAB89;
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context->state[2] = 0x98BADCFE;
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context->state[3] = 0x10325476;
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context->state[4] = 0xC3D2E1F0;
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context->count[0] = context->count[1] = 0;
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}
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/* Run your data through this. */
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void sha1_update(
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sha1_ctx* context,
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const unsigned char* data,
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uint32_t len
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)
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{
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uint32_t i;
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uint32_t j;
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j = context->count[0];
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if ((context->count[0] += len << 3) < j)
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context->count[1]++;
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context->count[1] += (len >> 29);
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j = (j >> 3) & 63;
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if ((j + len) > 63)
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{
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memcpy(&context->buffer[j], data, (i = 64 - j));
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sha1_transform(context->state, context->buffer);
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for (; i + 63 < len; i += 64)
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{
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sha1_transform(context->state, &data[i]);
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}
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j = 0;
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}
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else
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i = 0;
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memcpy(&context->buffer[j], &data[i], len - i);
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}
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/* Add padding and return the message digest. */
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void sha1_final(
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unsigned char digest[20],
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sha1_ctx* context
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)
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{
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unsigned i;
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unsigned char finalcount[8];
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unsigned char c;
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#if 0 /* untested "improvement" by DHR */
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/* Convert context->count to a sequence of bytes
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* in finalcount. Second element first, but
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* big-endian order within element.
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* But we do it all backwards.
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*/
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unsigned char* fcp = &finalcount[8];
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for (i = 0; i < 2; i++)
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{
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uint32_t t = context->count[i];
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int j;
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for (j = 0; j < 4; t >>= 8, j++)
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*--fcp = (unsigned char)t
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}
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#else
|
||||
for (i = 0; i < 8; i++)
|
||||
{
|
||||
finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] >> ((3 - (i & 3)) * 8)) & 255); /* Endian independent */
|
||||
}
|
||||
#endif
|
||||
c = 0200;
|
||||
sha1_update(context, &c, 1);
|
||||
while ((context->count[0] & 504) != 448)
|
||||
{
|
||||
c = 0000;
|
||||
sha1_update(context, &c, 1);
|
||||
}
|
||||
sha1_update(context, finalcount, 8); /* Should cause a SHA1Transform() */
|
||||
for (i = 0; i < 20; i++)
|
||||
{
|
||||
digest[i] = (unsigned char)
|
||||
((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
|
||||
}
|
||||
/* Wipe variables */
|
||||
memset(context, '\0', sizeof(*context));
|
||||
memset(&finalcount, '\0', sizeof(finalcount));
|
||||
}
|
||||
|
||||
void sha1(
|
||||
char* hash_out,
|
||||
const char* str,
|
||||
int len)
|
||||
{
|
||||
sha1_ctx ctx;
|
||||
unsigned int ii;
|
||||
|
||||
sha1_init(&ctx);
|
||||
for (ii = 0; ii < len; ii += 1)
|
||||
sha1_update(&ctx, (const unsigned char*)str + ii, 1);
|
||||
sha1_final((unsigned char*)hash_out, &ctx);
|
||||
hash_out[20] = '\0';
|
||||
}
|
||||
@ -0,0 +1,75 @@
|
||||
#pragma once
|
||||
#include <ntifs.h>
|
||||
|
||||
typedef struct _inline_hook_t
|
||||
{
|
||||
unsigned char code[14];
|
||||
unsigned char jmp_code[14];
|
||||
|
||||
void* address;
|
||||
void* hook_address;
|
||||
} inline_hook_t, * pinline_hook_t;
|
||||
|
||||
void make_inline_hook(pinline_hook_t, void*, void*, bool);
|
||||
void enable_inline_hook(pinline_hook_t);
|
||||
void disable_inline_hook(pinline_hook_t);
|
||||
|
||||
inline void make_inline_hook(pinline_hook_t hook, void* hook_from, void* hook_to, bool install)
|
||||
{
|
||||
unsigned char jmp_code[14] =
|
||||
{
|
||||
0xff, 0x25, 0x0, 0x0, 0x0, 0x0, // jmp QWORD PTR[rip + 0x0]
|
||||
|
||||
// jmp address...
|
||||
0x0, 0x0, 0x0, 0x0,
|
||||
0x0, 0x0, 0x0, 0x0
|
||||
};
|
||||
|
||||
// save original bytes, and hook related addresses....
|
||||
hook->address = hook_from;
|
||||
hook->hook_address = hook_to;
|
||||
memcpy(hook->code, hook_from, sizeof hook->code);
|
||||
|
||||
// setup hook...
|
||||
memcpy(jmp_code + 6, &hook_to, sizeof hook_to);
|
||||
memcpy(hook->jmp_code, jmp_code, sizeof jmp_code);
|
||||
if (install) enable_inline_hook(hook);
|
||||
}
|
||||
|
||||
inline void enable_inline_hook(pinline_hook_t hook)
|
||||
{
|
||||
{
|
||||
auto cr0 = __readcr0();
|
||||
cr0 &= 0xfffffffffffeffff;
|
||||
__writecr0(cr0);
|
||||
_disable();
|
||||
}
|
||||
|
||||
memcpy(hook->address, hook->jmp_code, sizeof hook->jmp_code);
|
||||
|
||||
{
|
||||
auto cr0 = __readcr0();
|
||||
cr0 |= 0x10000;
|
||||
_enable();
|
||||
__writecr0(cr0);
|
||||
}
|
||||
}
|
||||
|
||||
inline void disable_inline_hook(pinline_hook_t hook)
|
||||
{
|
||||
{
|
||||
auto cr0 = __readcr0();
|
||||
cr0 &= 0xfffffffffffeffff;
|
||||
__writecr0(cr0);
|
||||
_disable();
|
||||
}
|
||||
|
||||
memcpy(hook->address, hook->code, sizeof hook->code);
|
||||
|
||||
{
|
||||
auto cr0 = __readcr0();
|
||||
cr0 |= 0x10000;
|
||||
_enable();
|
||||
__writecr0(cr0);
|
||||
}
|
||||
}
|
||||
|
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