mirror of
https://github.com/wavestone-cdt/EDRSandblast.git
synced 2026-06-08 16:37:12 +00:00
Maxime Meignan
85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/*
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* Functions that browse the PEB structure instead of relying on GetModuleHandle
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*/
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#include "Undoc.h"
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#include "PEBBrowse.h"
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#include "PrintFunctions.h"
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#include <stdio.h>
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/*
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Get the module entry in the InLoadOrderModuleList given the module name
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*/
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LDR_DATA_TABLE_ENTRY* getModuleEntryFromNameW(const WCHAR* name) {
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size_t nameSize = wcslen(name);
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for (LDR_DATA_TABLE_ENTRY* currentModuleEntry = getNextModuleEntryInLoadOrder(NULL); currentModuleEntry != NULL; currentModuleEntry = getNextModuleEntryInLoadOrder(currentModuleEntry)) {
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if (!_memicmp(currentModuleEntry->BaseDllName.Buffer, name, sizeof(WCHAR) * nameSize)) {
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return currentModuleEntry;
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}
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}
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#ifdef _DEBUG
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printf_or_not("getModuleEntryFromNameW failed to find module\n");
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#endif // _DEBUG
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return NULL;
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}
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/*
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Get the module entry in the InLoadOrderModuleList given an address inside it
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Assumes : the address belong to a module
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Returns : the module it should belong to
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*/
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LDR_DATA_TABLE_ENTRY* getModuleEntryFromAbsoluteAddr(PVOID addr) {
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LDR_DATA_TABLE_ENTRY* closest = NULL;
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uintptr_t distance = (uintptr_t)-1;
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for (LDR_DATA_TABLE_ENTRY* ptr = getNextModuleEntryInLoadOrder(NULL); ptr != NULL; ptr = getNextModuleEntryInLoadOrder(ptr)) {
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if (ptr->DllBase <= addr && ((uintptr_t)addr - (uintptr_t)ptr->DllBase) < distance) {
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distance = ((uintptr_t)addr - (uintptr_t)ptr->DllBase);
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closest = ptr;
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}
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}
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return closest;
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}
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/*
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Returns the next module entry in the InLoadOrderModuleList
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Assumes : curr is a ptr to a module entry in the list or NULL
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Returns :
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* if curr is non-NULL:
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* A pointer to the next entry in the list, or
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* A NULL pointer, if end of the list is reached
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* if curr is NULL
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* A pointer to the first element of the list
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*/
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LDR_DATA_TABLE_ENTRY* getNextModuleEntryInLoadOrder(LDR_DATA_TABLE_ENTRY* curr) {
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LDR_DATA_TABLE_ENTRY* start = (LDR_DATA_TABLE_ENTRY*)getPEB()->Ldr->InLoadOrderModuleList.Flink;
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if (curr == NULL) {
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return start;
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}
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LDR_DATA_TABLE_ENTRY* next = (LDR_DATA_TABLE_ENTRY*)curr->InLoadOrderLinks.Flink;
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if (next == start) {
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return NULL;
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}
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return next;
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}
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#if _WIN64
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PEB64* getPEB() {
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return (PEB64*)__readgsqword(0x60);
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}
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TEB64* getTEB() {
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return (TEB64*)__readgsqword(0x30);
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}
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#else
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PEB* getPEB() {
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return (PEB*)__readfsdword(0x30);
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}
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TEB* getTEB() {
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return (TEB*)__readfsdword(0x18);
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}
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#endif |