【软件逆向-某上市驱动以修改早期UC无附加读源码而稳定读方法】此文章归类为：软件逆向。
很久很久以前UC公开了一篇读写方法:87fK9s2c8@1M7s2y4Q4x3@1q4Q4x3V1k6Q4x3V1k6%4N6%4N6Q4x3X3g2#2L8X3E0F1L8%4N6F1j5$3S2W2j5i4c8K6i4K6u0W2L8h3g2Q4x3V1k6X3L8%4u0#2L8g2)9J5c8X3q4F1N6r3W2Q4x3X3c8U0K9r3g2S2N6q4)9J5k6r3u0&6M7r3q4K6M7#2)9J5c8U0b7@1y4o6t1^5z5g2)9J5k6s2u0W2j5h3c8Q4x3X3c8H3M7X3!0U0k6i4y4K6i4K6u0V1M7r3S2&6M7$3W2U0j5h3I4Q4x3X3c8E0k6h3#2G2M7Y4W2Q4x3X3c8S2N6s2c8S2j5$3S2Q4x3X3g2Z5N6r3#2D9
修改其中一部分
直接上伪代码 "记得刷页 记得刷页 记得刷页"
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | NTSTATUS __fastcall readmem( HANDLE ProcessId, __int64 TargetAddress, signed __int64 Size, char *SourceAddress, __int64 Flag){ char *pSourceBuffer; // r13 signed __int64 BytesToCopy; // r14 __int64 DstAddress; // rsi NTSTATUS ntStatus; // eax __int64 ProcessCr3; // rdi int BuildNumber; // eax char FlagValue; // fl int Index; // r8d __int64 IndexOffset; // rdx char *pInternalBuffer; // r15 char *pMappingAddress; // r11 __int64 BytesRemaining; // r10 unsigned __int64 *pPTE; // rdx char _AH; // ah char _CL; // cl __int64 PageTableBase_1; // r14 __int64 cpy_already; // r13 unsigned __int64 VirtualAddress; // r9 __int64 PML4EIndex; // rcx __int64 PDPTEntry; // rcx __int64 v28; // r8 __int64 v29; // rdi __int64 v30; // rcx __int64 v31; // r9 __int64 v32; // rcx __int64 v33; // rdi unsigned __int64 v34; // r8 char *v35; // rsi __int64 v36; // rax char *v37; // rax char *v38; // rdi char _SI; // si PEPROCESS TargetProcess; // [rsp-60h] [rbp-68h] BYREF __int64 TempPTE; // [rsp-58h] [rbp-60h] BYREF __int64 ProcessCr3buffer; // [rsp-50h] [rbp-58h] unsigned __int64 v43; // [rsp-48h] [rbp-50h] __int64 CurrentIrql; // [rsp-40h] [rbp-48h] int v45; // [rsp+10h] [rbp+8h] pSourceBuffer = SourceAddress; BytesToCopy = Size; DstAddress = TargetAddress; if ( !ProcessId || !TargetAddress || !SourceAddress || (unsigned __int64)(Size - 1) > 0xFFF ) return 0xC0000001; if ( !MmAllocateMappingAddress_MEM ) // // 初始化映射地址空间和缓冲区（如果尚未初始化） MmAllocateMappingAddress_MEM = (__int64)MmAllocateMappingAddress(0x200000ui64, 1u);// 分配 2MB 的映射地址空间 if ( !ExAllocatePoolWithTag_mem ) ExAllocatePoolWithTag_mem = (__int64)ExAllocatePoolWithTag(NonPagedPool, 0x200000ui64, 1u);// 分配 2MB 的非分页内存池 if ( !qword_12D48 ) qword_12D48 = *(__int64 *)((char *)&MmGetVirtualForPhysical + 0x22);// 获取用于虚拟地址到物理地址转换的内核变量 TargetProcess = 0i64; ntStatus = PsLookupProcessByProcessId(ProcessId, &TargetProcess); if ( ntStatus ) return ntStatus; ProcessCr3 = GetCr3((__int64)TargetProcess); ProcessCr3buffer = ProcessCr3; ObfDereferenceObject(TargetProcess); BuildNumber = ((__int64 (*)(void))loc_1061)();// 获取构建号 v45 = BuildNumber; Index = BuildNumber; if ( BuildNumber == -1 ) return 0xC0000001; IndexOffset = BuildNumber << 12; // 计算临时缓冲区和映射地址的偏移 pInternalBuffer = (char *)(IndexOffset + ExAllocatePoolWithTag_mem); if ( Flag ) // 根据 Flag 预先复制数据到内部缓冲区 { qmemcpy(pInternalBuffer, pSourceBuffer, BytesToCopy); DstAddress = TargetAddress; ProcessCr3 = ProcessCr3buffer; } pMappingAddress = (char *)(IndexOffset + MmAllocateMappingAddress_MEM);// 计算映射地址 BytesRemaining = BytesToCopy; // 计算 PTE 指针 pPTE = (unsigned __int64 *)(qword_12D48 + (((unsigned __int64)(IndexOffset + MmAllocateMappingAddress_MEM) >> 9) & 0x7FFFFFFFF8i64)); v43 = *pPTE; // 保存原始 PTE _AH = FlagValue; _disable(); // 禁用中断并提升 IRQL __asm { rcl ah, 96h } CurrentIrql = KeGetCurrentIrql(); __writecr8(2ui64); // 将 IRQL 设置为 DISPATCH_LEVEL if ( BytesToCopy > 0 ) // 循环遍历内存页，逐页复制数据 { _CL = -79; __asm { rcr r9w, cl rcl r9w, 3Ch } PageTableBase_1 = ProcessCr3 & 0xFFFFFFFFFF000i64;// 获取页目录基地址的低 48 位 cpy_already = 0i64; while ( 1 ) { VirtualAddress = DstAddress + cpy_already;// 当前要处理的虚拟地址 TempPTE = 0i64; PML4EIndex = ((unsigned __int64)(DstAddress + cpy_already) >> 39) & 0x1FF; *pPTE = (PageTableBase_1 + 8 * PML4EIndex) & 0xFFFFFFFFFFFFF000ui64 | 0x1E3; __invlpg(pMappingAddress); // TLB 中对应的条目失效 qmemcpy(&TempPTE, &pMappingAddress[8 * PML4EIndex], sizeof(TempPTE));// 读取 PML4E // PDPTEntry = TempPTE; if ( (TempPTE & 1) == 0 || ((ProcessCr3buffer ^ TempPTE) & 0xFFFFFFFFFF000i64) == 0 || (TempPTE = 0i64, v28 = (PDPTEntry & 0xFFFFFFFFFF000i64) + 8 * ((VirtualAddress >> 30) & 0x1FF), *pPTE = v28 & 0xFFFFFFFFFFFFF000ui64 | 0x1E3, __invlpg(pMappingAddress), qmemcpy(&TempPTE, &pMappingAddress[v28 & 0xFFF], sizeof(TempPTE)), v29 = TempPTE, (TempPTE & 1) == 0) ) {LABEL_44: BytesToCopy = Size; pSourceBuffer = SourceAddress; Index = v45; break; } if ( (TempPTE & 0x80u) == 0i64 ) { TempPTE = 0i64; v28 = (v29 & 0xFFFFFFFFFF000i64) + 8 * ((VirtualAddress >> 21) & 0x1FF); *pPTE = v28 & 0xFFFFFFFFFFFFF000ui64 | 0x1E3; __invlpg(pMappingAddress); qmemcpy(&TempPTE, &pMappingAddress[v28 & 0xFFF], sizeof(TempPTE)); v29 = TempPTE; if ( (TempPTE & 1) == 0 ) goto LABEL_44; if ( (TempPTE & 0x80u) == 0i64 ) { TempPTE = 0i64; v28 = (v29 & 0xFFFFFFFFFF000i64) + 8 * ((VirtualAddress >> 12) & 0x1FF); *pPTE = v28 & 0xFFFFFFFFFFFFF000ui64 | 0x1E3; __invlpg(pMappingAddress); qmemcpy(&TempPTE, &pMappingAddress[v28 & 0xFFF], sizeof(TempPTE)); if ( (TempPTE & 1) == 0 ) goto LABEL_44; if ( (TempPTE & 2) != 0 ) v28 = 0i64; v32 = (VirtualAddress & 0xFFF) + (TempPTE & 0xFFFFFFFFFF000i64); goto LABEL_32; } v30 = TempPTE & 0xFFFFFFFE00000i64; v31 = VirtualAddress & 0x1FFFFF; } else { v30 = TempPTE & 0xFFFFFC0000000i64; v31 = VirtualAddress & 0x3FFFFFFF; } v32 = v30 + v31; if ( (v29 & 2) != 0 ) v28 = 0i64;LABEL_32: if ( v32 && (!v28 || Flag != 1) ) { v33 = v32 & 0xFFF; v34 = BytesRemaining; if ( 4096 - v33 < (unsigned __int64)BytesRemaining ) v34 = 4096 - v33; if ( v34 ) { v35 = &pInternalBuffer[cpy_already]; v36 = 483i64; if ( Flag == 2 ) v36 = 511i64; *pPTE = v32 & 0xFFFFFFFFFFFFF000ui64 | v36; __invlpg(pMappingAddress); v37 = &pMappingAddress[v33]; if ( Flag ) { v38 = &pMappingAddress[v33]; } else { v38 = &pInternalBuffer[cpy_already]; v35 = v37; } BytesRemaining -= v34; cpy_already += v34; qmemcpy(v38, v35, v34); _SI = (_BYTE)v35 + v34; __asm { rcl sil, cl } DstAddress = TargetAddress; if ( BytesRemaining > 0 ) continue; } } goto LABEL_44; } } *pPTE = v43; __invlpg(pMappingAddress); __writecr8((unsigned __int8)CurrentIrql); _enable(); if ( !Flag ) qmemcpy(pSourceBuffer, pInternalBuffer, BytesToCopy); memset(pInternalBuffer, 0, BytesToCopy); byte_12B40[Index] = 0; return -(int)BytesRemaining;} |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 | #include <ntddk.h>// 假设的全局变量，在实际驱动程序中需要正确初始化extern PVOID MmAllocateMappingAddress_MEM;extern PVOID ExAllocatePoolWithTag_mem;extern PVOID qword_12D48;extern CHAR byte_12B40[256]; // 假设的大小// 假设的函数原型，这些函数在 ntoskrnl.exe 中extern NTSTATUS ObfDereferenceObject(PVOID Object);extern NTSTATUS PsLookupProcessByProcessId(HANDLE ProcessId, PEPROCESS* Process);extern PHYSICAL_ADDRESS MmGetPhysicalAddress(PVOID BaseAddress);extern PVOID MmGetVirtualForPhysical(PHYSICAL_ADDRESS PhysicalAddress);extern PVOID MmAllocateMappingAddress(SIZE_T NumberOfBytes, ULONG Tag);extern VOID MmFreeMappingAddress(PVOID BaseAddress, ULONG Tag);extern PVOID ExAllocatePoolWithTag(POOL_TYPE PoolType, SIZE_T NumberOfBytes, ULONG Tag);extern VOID ExFreePool(PVOID P);extern KIRQL KeGetCurrentIrql();extern void _disable();extern void _enable();extern __int64 GetCr3(__int64 a1);extern int loc_1061(); // 假设的函数//将内联汇编改写成C/C++#define Barrier() _ReadWriteBarrier()#define __invlpg(addr) { \ __try { \ ProbeForRead(addr, 1, 1); \ } __except (EXCEPTION_EXECUTE_HANDLER) {} \ }NTSTATUS tlb_relate( HANDLE ProcessId, PVOID TargetAddress, SIZE_T Size, PVOID SourceAddress, ULONG Flag){ // 检查参数有效性 if (!ProcessId || !TargetAddress || !SourceAddress || (Size - 1) > 0xFFF) { return STATUS_INVALID_PARAMETER; } // 1. 获取目标进程的 EPROCESS PEPROCESS TargetProcess = nullptr; NTSTATUS status = PsLookupProcessByProcessId(ProcessId, &TargetProcess); if (!NT_SUCCESS(status)) { return status; } // 2. 获取目标进程的 CR3 __int64 ProcessCr3 = GetCr3((__int64)TargetProcess); __int64 OriginalCr3 = ProcessCr3; // 保存原始 CR3 值 ObfDereferenceObject(TargetProcess); //获取构建号 int BuildNumber = loc_1061(); if (BuildNumber == -1) { return STATUS_INVALID_PARAMETER; } // 3. 初始化内部缓冲区和映射地址空间 if (!MmAllocateMappingAddress_MEM) { MmAllocateMappingAddress_MEM = MmAllocateMappingAddress(0x200000, 'MyTg'); //使用'MyTg'作为tag } if (!ExAllocatePoolWithTag_mem) { ExAllocatePoolWithTag_mem = ExAllocatePoolWithTag(NonPagedPool, 0x200000, 'MyTg'); //使用'MyTg'作为tag } if (!MmAllocateMappingAddress_MEM || !ExAllocatePoolWithTag_mem) { if (MmAllocateMappingAddress_MEM) { MmFreeMappingAddress(MmAllocateMappingAddress_MEM, 'MyTg'); MmAllocateMappingAddress_MEM = nullptr; // 避免double free } if (ExAllocatePoolWithTag_mem) { ExFreePool(ExAllocatePoolWithTag_mem); ExAllocatePoolWithTag_mem = nullptr; // 避免 double free } return STATUS_INSUFFICIENT_RESOURCES; } if (!qword_12D48) { qword_12D48 = *reinterpret_cast<PVOID*>(reinterpret_cast<char*>(MmGetVirtualForPhysical) + 0x22); } //计算在缓冲区内的偏移 __int64 IndexOffset = (__int64)BuildNumber << 12; char* pInternalBuffer = reinterpret_cast<char*>(ExAllocatePoolWithTag_mem) + IndexOffset; char* pMappingAddress = reinterpret_cast<char*>(MmAllocateMappingAddress_MEM) + IndexOffset; // 4. 根据 Flag 预复制数据 if (Flag && (Flag != 1)) { RtlCopyMemory(pInternalBuffer, SourceAddress, Size); } // 5. 提升 IRQL 并禁用中断 (进入关键区) KIRQL OldIrql = KeGetCurrentIrql(); if (OldIrql < DISPATCH_LEVEL) { KeRaiseIrql(DISPATCH_LEVEL, &OldIrql); } // 6. 遍历页表 SIZE_T BytesRemaining = Size; SIZE_T BytesCopied = 0; while (BytesRemaining > 0) { PVOID CurrentVirtualAddress = reinterpret_cast<char*>(TargetAddress) + BytesCopied; // 6.1 计算页表索引 ULONG64 PML4EIndex = ((ULONG64)CurrentVirtualAddress >> 39) & 0x1FF; ULONG64 PDPEIndex = ((ULONG64)CurrentVirtualAddress >> 30) & 0x1FF; ULONG64 PDEIndex = ((ULONG64)CurrentVirtualAddress >> 21) & 0x1FF; ULONG64 PTEIndex = ((ULONG64)CurrentVirtualAddress >> 12) & 0x1FF; ULONG64 PageOffset = (ULONG64)CurrentVirtualAddress & 0xFFF; // 6.2 获取并修改 PTE ULONG64* pPTE = reinterpret_cast<ULONG64*>(reinterpret_cast<char*>(qword_12D48) + (((ULONG64)pMappingAddress >> 9) & 0x7FFFFFFFF8)); Barrier(); ULONG64 OriginalPTE = *pPTE; // 6.2.1 获取 PML4E *pPTE = (ProcessCr3 & 0xFFFFFFFFFF000ULL) | (PML4EIndex << 3) | 0x1E3; __invlpg(pMappingAddress); Barrier(); ULONG64 PML4E = *reinterpret_cast<PULONG64>(pMappingAddress + (PML4EIndex * sizeof(ULONG64))); if (!(PML4E & 1) || ((OriginalCr3 ^ PML4E) & 0xFFFFFFFFFF000ULL) == 0) { goto Cleanup; } // 6.2.2 获取 PDPE *pPTE = (PML4E & 0xFFFFFFFFFF000ULL) | (PDPEIndex << 3) | 0x1E3; __invlpg(pMappingAddress); Barrier(); ULONG64 PDPE = *reinterpret_cast<PULONG64>(pMappingAddress + (PDPEIndex * sizeof(ULONG64))); if (!(PDPE & 1)) { goto Cleanup; } if (!(PDPE & 0x80)) // 如果不是大页(1GB) { // 6.2.3 获取 PDE *pPTE = (PDPE & 0xFFFFFFFFFF000ULL) | (PDEIndex << 3) | 0x1E3; __invlpg(pMappingAddress); Barrier(); ULONG64 PDE = *reinterpret_cast<PULONG64>(pMappingAddress + (PDEIndex * sizeof(ULONG64))); if (!(PDE & 1)) //检查有效位 { goto Cleanup; } if (!(PDE & 0x80)) // 如果不是大页 (2MB) { // 6.2.4 获取 PTE *pPTE = (PDE & 0xFFFFFFFFFF000ULL) | (PTEIndex << 3) | 0x1E3; __invlpg(pMappingAddress); Barrier(); ULONG64 PTE = *reinterpret_cast<PULONG64>(pMappingAddress + (PTEIndex * sizeof(ULONG64))); if (!(PTE & 1)) //检查有效位 { goto Cleanup; } // 6.2.5 4KB 页复制 PHYSICAL_ADDRESS PhysicalAddress; PhysicalAddress.QuadPart = (PTE & 0xFFFFFFFFFF000ULL) | PageOffset; // 设置 PTE 为可读写等 ULONG64 PTEFlags = 483; if (Flag == 2) { PTEFlags = 511; } *pPTE = PhysicalAddress.QuadPart & 0xFFFFFFFFFFFFF000ULL | PTEFlags; __invlpg(pMappingAddress); Barrier(); PVOID DestAddress = pMappingAddress + PageOffset; PVOID SrcAddress = nullptr; if (Flag == 0) { //写 SrcAddress = pInternalBuffer + BytesCopied; } else { //读 SrcAddress = DestAddress; DestAddress = pInternalBuffer + BytesCopied; } SIZE_T BytesToCopyInPage = min(4096 - PageOffset, BytesRemaining); RtlCopyMemory(DestAddress, SrcAddress, BytesToCopyInPage); BytesRemaining -= BytesToCopyInPage; BytesCopied += BytesToCopyInPage; } else { // 6.2.6 处理 2MB 大页 PHYSICAL_ADDRESS PhysicalAddress; PhysicalAddress.QuadPart = (PDE & 0xFFFFFFFE00000ULL) | ((ULONG64)CurrentVirtualAddress & 0x1FFFFF); // 设置 PTE 为可读写等 ULONG64 PTEFlags = 483; if (Flag == 2) { PTEFlags = 511; } *pPTE = PhysicalAddress.QuadPart & 0xFFFFFFFFFFFFF000ULL | PTEFlags; __invlpg(pMappingAddress); Barrier(); PVOID DestAddress = pMappingAddress + ((ULONG64)CurrentVirtualAddress & 0xFFF); PVOID SrcAddress = nullptr; if (Flag == 0) { //写 SrcAddress = pInternalBuffer + BytesCopied; } else { //读 SrcAddress = DestAddress; DestAddress = pInternalBuffer + BytesCopied; } SIZE_T BytesToCopyInPage = min(4096 - ((ULONG64)CurrentVirtualAddress & 0xFFF), BytesRemaining); RtlCopyMemory(DestAddress, SrcAddress, BytesToCopyInPage); BytesRemaining -= BytesToCopyInPage; BytesCopied += BytesToCopyInPage; } } else { //6.2.7 处理1GB页 PHYSICAL_ADDRESS PhysicalAddress; PhysicalAddress.QuadPart = (PDPE & 0xFFFFFC0000000ULL) | ((ULONG64)CurrentVirtualAddress & 0x3FFFFFFF); // 设置 PTE 为可读写等 ULONG64 PTEFlags = 483; if (Flag == 2) { PTEFlags = 511; } *pPTE = PhysicalAddress.QuadPart & 0xFFFFFFFFFFFFF000ULL | PTEFlags; __invlpg(pMappingAddress); Barrier(); PVOID DestAddress = pMappingAddress + ((ULONG64)CurrentVirtualAddress & 0xFFF); PVOID SrcAddress = nullptr; if (Flag == 0) { //写 SrcAddress = pInternalBuffer + BytesCopied; } else { //读 SrcAddress = DestAddress; DestAddress = pInternalBuffer + BytesCopied; } SIZE_T BytesToCopyInPage = min(4096 - ((ULONG64)CurrentVirtualAddress & 0xFFF), BytesRemaining); RtlCopyMemory(DestAddress, SrcAddress, BytesToCopyInPage); BytesRemaining -= BytesToCopyInPage; BytesCopied += BytesToCopyInPage; } }Cleanup: // 7. 恢复 PTE、IRQL 和中断 *pPTE = OriginalPTE; __invlpg(pMappingAddress); Barrier(); if (OldIrql < DISPATCH_LEVEL) { KeLowerIrql(OldIrql); } // 8. 如果 Flag 为 0，将数据从内部缓冲区复制到 SourceAddress if (Flag == 0) { RtlCopyMemory(SourceAddress, pInternalBuffer, Size); } // 9. 清空内部缓冲区, 设置标志位, 返回 RtlZeroMemory(pInternalBuffer, Size); byte_12B40[BuildNumber] = 0; return (NTSTATUS)(BytesRemaining == 0 ? STATUS_SUCCESS : STATUS_UNSUCCESSFUL);} |
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