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add: elements of strings are now 1 byte, string encryption for Windows APIs, fix: nullptr

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This commit is contained in:
ALittlePatate
2024-08-24 19:32:57 +02:00
parent e5603117d4
commit 5e230e1e02
4 changed files with 70 additions and 27 deletions
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24
src/api.c
View File

@@ -53,7 +53,13 @@ void api_callrawaddr() {
#endif
void api_VirtualAlloc(void) {
#ifdef _WIN32
fVirtualAlloc pVirtualAlloc = GetApi(L"kernel32.dll", "VirtualAlloc");
char api[] = "[nwyzfqFqqth";
fVirtualAlloc pVirtualAlloc = GetApi(L"kernel32.dll", PCAESAR_DECRYPT(api));
if (pVirtualAlloc == NULL) {
state->STACK_IDX -= 4;
state->registers->eax = 1;
return;
}
long long arg0 = state->STACK[state->STACK_IDX--];
long long arg1 = state->STACK[state->STACK_IDX--];
long long arg2 = state->STACK[state->STACK_IDX--];
@@ -71,7 +77,13 @@ void api_VirtualAlloc(void) {
#endif
void api_VirtualFree(void) {
#ifdef _WIN32
fVirtualFree pVirtualFree = GetApi(L"kernel32.dll", "VirtualFree");
char api[] = "[nwyzfqKwjj";
fVirtualFree pVirtualFree = GetApi(L"kernel32.dll", PCAESAR_DECRYPT(api));
if (pVirtualFree == NULL) {
state->STACK_IDX -= 3;
state->registers->eax = 1;
return;
}
long long arg0 = state->STACK[state->STACK_IDX--];
long long arg1 = state->STACK[state->STACK_IDX--];
long long arg2 = state->STACK[state->STACK_IDX--];
@@ -88,7 +100,13 @@ void api_VirtualFree(void) {
#endif
void api_GetAsyncKeyState(void) {
#ifdef _WIN32
fGetAsyncKeyState pGetAsyncKeyState = GetApi(L"user32.dll", "GetAsyncKeyState");
char api[] = "LjyFx~shPj~Xyfyj";
fGetAsyncKeyState pGetAsyncKeyState = GetApi(L"user32.dll", PCAESAR_DECRYPT(api));
if (pGetAsyncKeyState == NULL) {
state->STACK_IDX -= 1;
state->registers->eax = 1;
return;
}
long long arg0 = state->STACK[state->STACK_IDX--];
state->registers->eax = (long long)pGetAsyncKeyState((int)arg0);
#else

52
src/libc.c
View File

@@ -39,19 +39,43 @@ fHeapReAlloc pHeapReAlloc = NULL;
#define IS_NUM(c) ((c >= '0' && c <= '9') ? (1) : (0))
#define IS_SPACE(c) (c == ' ')
int strlen__(char const* str)
{
int len = 0;
if (!str)
return 1;
for (int i = 0; str[i] != '\0'; i += 1) {
len += 1;
}
return (len);
}
#ifdef _WIN32
char* PCAESAR_DECRYPT(char* in) {
for (int i = 0; i < strlen__(in); i++) {
in[i] -= KEY;
}
return in;
}
#endif
void* malloc_(size_t _Size) {
#ifndef _WIN32
return malloc(_Size);
#else
if (_crt_heap_ == 0) {
if (pHeapCreate == NULL) {
pHeapCreate = GetApi(L"KERNEL32.DLL", "HeapCreate");
char api[] = "MjfuHwjfyj";
pHeapCreate = GetApi(L"KERNEL32.DLL", PCAESAR_DECRYPT(api));
}
_crt_heap_ = pHeapCreate(0, 0, 0);
}
if (pHeapAlloc == NULL) {
pHeapAlloc = GetApi(L"KERNEL32.DLL", "HeapAlloc");
char api[] = "MjfuFqqth";
pHeapAlloc = GetApi(L"KERNEL32.DLL", PCAESAR_DECRYPT(api));
}
return pHeapAlloc(_crt_heap_, HEAP_ZERO_MEMORY, _Size);
#endif
@@ -63,7 +87,8 @@ void free_(void* _Block) {
return;
#else
if (pHeapFree == NULL) {
pHeapFree = GetApi(L"KERNEL32.DLL", "HeapFree");
char api[] = "MjfuKwjj";
pHeapFree = GetApi(L"KERNEL32.DLL", PCAESAR_DECRYPT(api));
}
pHeapFree(_crt_heap_, 0, _Block);
return;
@@ -76,35 +101,26 @@ void* realloc_(void* _Block, size_t _Size) {
#else
if (_crt_heap_ == 0) {
if (pHeapCreate == NULL) {
pHeapCreate = GetApi(L"KERNEL32.DLL", "HeapCreate");
char api[] = "MjfuHwjfyj";
pHeapCreate = GetApi(L"KERNEL32.DLL", PCAESAR_DECRYPT(api));
}
_crt_heap_ = pHeapCreate(0, 0, 0);
}
if (_Block == NULL) {
if (pHeapAlloc == NULL) {
pHeapAlloc = GetApi(L"KERNEL32.DLL", "HeapAlloc");
char api[] = "MjfuFqqth";
pHeapAlloc = GetApi(L"KERNEL32.DLL", PCAESAR_DECRYPT(api));
}
return pHeapAlloc(_crt_heap_, HEAP_ZERO_MEMORY, _Size);
}
if (pHeapReAlloc == NULL) {
pHeapReAlloc = GetApi(L"KERNEL32.DLL", "HeapReAlloc");
char api[] = "MjfuWjFqqth";
pHeapReAlloc = GetApi(L"KERNEL32.DLL", PCAESAR_DECRYPT(api));
}
return pHeapReAlloc(_crt_heap_, HEAP_ZERO_MEMORY, _Block, _Size);
#endif
}
int strlen__(char const* str)
{
int len = 0;
if (!str)
return 1;
for (int i = 0; str[i] != '\0'; i += 1) {
len += 1;
}
return (len);
}
char* strcpy__(char* dest, char const* src)
{
int len = strlen__(src);

3
src/libc.h
View File

@@ -5,6 +5,9 @@
#include <Windows.h>
extern HANDLE _crt_heap_;
#define KEY 5
char* PCAESAR_DECRYPT(char* in);
#endif
void* malloc_(size_t _Size);

18
src/pasm.c
View File

@@ -30,12 +30,18 @@ int dprintf(int stream, const char * format, ...) {
va_start(args, format);
HANDLE h;
if (pGetStdHandle == NULL)
pGetStdHandle = (fGetStdHandle)GetApi(L"KERNEL32.DLL", "GetStdHandle");
if (pwvsprintfA == NULL)
pwvsprintfA = (fwvsprintfA)GetApi(L"USER32.dll", "wvsprintfA");
if (pWriteFile == NULL)
pWriteFile = (fWriteFile)GetApi(L"KERNEL32.DLL", "WriteFile");
if (pGetStdHandle == NULL) {
char api[] = "LjyXyiMfsiqj";
pGetStdHandle = (fGetStdHandle)GetApi(L"KERNEL32.DLL", PCAESAR_DECRYPT(api));
}
if (pwvsprintfA == NULL) {
char api[] = "|{xuwnsykF";
pwvsprintfA = (fwvsprintfA)GetApi(L"USER32.dll", PCAESAR_DECRYPT(api));
}
if (pWriteFile == NULL) {
char api[] = "\\wnyjKnqj";
pWriteFile = (fWriteFile)GetApi(L"KERNEL32.DLL", PCAESAR_DECRYPT(api));
}
switch (stream) {
case 1: // stdout