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createprocess: add replace_all flag

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This commit is contained in:
Kevin Trocolli 2023-09-15 19:57:11 -04:00
parent 5a4e947354
commit 528ec4379c
3 changed files with 18 additions and 16 deletions
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2
carolhook/dllmain.c
View File

@ -124,7 +124,7 @@ static DWORD CALLBACK carol_pre_startup(void)
goto fail;
}
hr = createprocess_push_hook_a(".\\15312firm\\firmupdate_1113.exe", "inject -d -k carolhook.dll ", NULL);
hr = createprocess_push_hook_a(".\\15312firm\\firmupdate_1113.exe", "inject -d -k carolhook.dll ", NULL, false);
if (FAILED(hr)) {
goto fail;

19
hooklib/createprocess.c
View File

@ -86,7 +86,7 @@ static size_t process_nsyms_w = 0;
static CRITICAL_SECTION createproc_lock;
HRESULT createprocess_push_hook_w(const wchar_t *name, const wchar_t *head, const wchar_t *tail) {
HRESULT createprocess_push_hook_w(const wchar_t *name, const wchar_t *head, const wchar_t *tail, bool replace_all) {
struct process_hook_sym_w *new_mem;
struct process_hook_sym_w *new_proc;
HRESULT hr;
@ -112,6 +112,7 @@ HRESULT createprocess_push_hook_w(const wchar_t *name, const wchar_t *head, cons
new_proc->name = name;
new_proc->head = head;
new_proc->tail = tail;
new_proc->replace_all = replace_all;
process_syms_w = new_mem;
process_nsyms_w++;
@ -120,7 +121,7 @@ HRESULT createprocess_push_hook_w(const wchar_t *name, const wchar_t *head, cons
return S_OK;
}
HRESULT createprocess_push_hook_a(const char *name, const char *head, const char *tail) {
HRESULT createprocess_push_hook_a(const char *name, const char *head, const char *tail, bool replace_all) {
struct process_hook_sym_a *new_mem;
struct process_hook_sym_a *new_proc;
@ -146,6 +147,7 @@ HRESULT createprocess_push_hook_a(const char *name, const char *head, const char
new_proc->name = name;
new_proc->head = head;
new_proc->tail = tail;
new_proc->replace_all = replace_all;
process_syms_a = new_mem;
process_nsyms_a++;
@ -184,17 +186,20 @@ static BOOL WINAPI my_CreateProcessA(
)
{
for (int i = 0; i < process_nsyms_a; i++) {
if (strncmp(process_syms_a->name, lpCommandLine, strlen(process_syms_a->name))) {
if (strncmp(process_syms_a[i].name, lpCommandLine, strlen(process_syms_a[i].name))) {
continue;
}
dprintf("CreateProcess: Hooking child process %s %s\n", lpApplicationName, lpCommandLine);
char new_cmd[MAX_PATH] = {0};
strcat_s(new_cmd, MAX_PATH, process_syms_a->head);
strcat_s(new_cmd, MAX_PATH, lpCommandLine);
strcat_s(new_cmd, MAX_PATH, process_syms_a[i].head);
if (process_syms_a->tail != NULL) {
strcat_s(new_cmd, MAX_PATH, process_syms_a->tail);
if (!process_syms_a[i].replace_all) {
strcat_s(new_cmd, MAX_PATH, lpCommandLine);
}
if (process_syms_a[i].tail != NULL) {
strcat_s(new_cmd, MAX_PATH, process_syms_a[i].tail);
}
dprintf("CreateProcess: Replaced CreateProcessA %s\n", new_cmd);

13
hooklib/createprocess.h
View File

@ -1,24 +1,21 @@
#pragma once
#include <windows.h>
#include <stdbool.h>
HRESULT createprocess_push_hook_w(const wchar_t *name, const wchar_t *head, const wchar_t *tail);
HRESULT createprocess_push_hook_a(const char *name, const char *head, const char *tail);
HRESULT createprocess_push_hook_w(const wchar_t *name, const wchar_t *head, const wchar_t *tail, bool replace_all);
HRESULT createprocess_push_hook_a(const char *name, const char *head, const char *tail, bool replace_all);
struct process_hook_sym_w {
const wchar_t *name;
size_t name_size;
const wchar_t *head;
size_t head_size;
const wchar_t *tail;
size_t tail_size;
bool replace_all;
};
struct process_hook_sym_a {
const char *name;
size_t name_size;
const char *head;
size_t head_size;
const char *tail;
size_t tail_size;
bool replace_all;
};