diff --git a/dll/advapi32.cpp b/dll/advapi32.cpp
index f4b996a..ebc4c1d 100644
--- a/dll/advapi32.cpp
+++ b/dll/advapi32.cpp
@@ -1,4 +1,5 @@
 #include "common.h"
+#include <sys/random.h>
 
 namespace advapi32 {
 	unsigned int WIN_FUNC RegOpenKeyExA(void *hKey, const char *lpSubKey, unsigned int ulOptions, void *samDesired, void **phkResult) {
@@ -23,12 +24,25 @@ namespace advapi32 {
 
 		return false;
 	}
+
+	bool WIN_FUNC CryptGenRandom(void* hProv, unsigned int dwLen, char* pbBuffer){
+		DEBUG_LOG("STUB: CryptGenRandom(%p)\n", hProv);
+		if (!pbBuffer || dwLen == 0) return false;
+
+		ssize_t ret = getrandom(pbBuffer, dwLen, 0);
+		if (ret < 0 || (size_t)ret != dwLen) {
+			return false;
+		}
+
+		return true;
+	}
 }
 
 static void *resolveByName(const char *name) {
 	if (strcmp(name, "RegOpenKeyExA") == 0) return (void *) advapi32::RegOpenKeyExA;
 	if (strcmp(name, "CryptReleaseContext") == 0) return (void*) advapi32::CryptReleaseContext;
 	if (strcmp(name, "CryptAcquireContextW") == 0) return (void*) advapi32::CryptAcquireContextW;
+	if (strcmp(name, "CryptGenRandom") == 0) return (void*) advapi32::CryptGenRandom;
 	return nullptr;
 }
 
diff --git a/dll/kernel32.cpp b/dll/kernel32.cpp
index 8e18008..b39d018 100644
--- a/dll/kernel32.cpp
+++ b/dll/kernel32.cpp
@@ -17,6 +17,7 @@
 #include <system_error>
 #include <sys/mman.h>
 #include <sys/stat.h>
+#include <sys/statvfs.h>
 #include <sys/wait.h>
 #include <spawn.h>
 #include <vector>
@@ -1709,6 +1710,30 @@ namespace kernel32 {
 		// return (void*)0x100003;
 	}
 
+	BOOL WIN_FUNC GetDiskFreeSpaceExW(const uint16_t* lpDirectoryName,
+		uint64_t* lpFreeBytesAvailableToCaller, uint64_t* lpTotalNumberOfBytes, uint64_t* lpTotalNumberOfFreeBytes){
+		if(!lpDirectoryName) return false;
+
+		std::string directoryName = wideStringToString(lpDirectoryName);
+		DEBUG_LOG("GetDiskFreeSpaceExW %s\n", directoryName.c_str());
+
+		struct statvfs buf;
+		if(statvfs(directoryName.c_str(), &buf) != 0){
+			return false;
+		}
+
+		if (lpFreeBytesAvailableToCaller)
+		    *lpFreeBytesAvailableToCaller = (uint64_t)buf.f_bavail * buf.f_bsize;
+		if (lpTotalNumberOfBytes)
+		    *lpTotalNumberOfBytes = (uint64_t)buf.f_blocks * buf.f_bsize;
+		if (lpTotalNumberOfFreeBytes)
+		    *lpTotalNumberOfFreeBytes = (uint64_t)buf.f_bfree * buf.f_bsize;
+
+		DEBUG_LOG("\t-> available bytes %llu, total bytes %llu, total free bytes %llu\n",
+			*lpFreeBytesAvailableToCaller, *lpTotalNumberOfBytes, *lpTotalNumberOfFreeBytes);
+		return true;
+	}
+
 	void* WIN_FUNC LockResource(void* res) {
 		DEBUG_LOG("LockResource %p\n", res);
 		return (void*)0x100004;
@@ -2622,6 +2647,7 @@ static void *resolveByName(const char *name) {
 	if (strcmp(name, "GetFileInformationByHandle") == 0) return (void *) kernel32::GetFileInformationByHandle;
 	if (strcmp(name, "GetTempFileNameA") == 0) return (void *) kernel32::GetTempFileNameA;
 	if (strcmp(name, "GetTempPathA") == 0) return (void *) kernel32::GetTempPathA;
+	if (strcmp(name, "GetDiskFreeSpaceExW") == 0) return (void*) kernel32::GetDiskFreeSpaceExW;
 
 	// sysinfoapi.h
 	if (strcmp(name, "GetSystemTime") == 0) return (void *) kernel32::GetSystemTime;
diff --git a/dll/msvcrt.cpp b/dll/msvcrt.cpp
index e12f982..2dbaaac 100644
--- a/dll/msvcrt.cpp
+++ b/dll/msvcrt.cpp
@@ -4,8 +4,10 @@
 #include <cstdlib>
 #include <cwchar>
 #include <cwctype>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string>
+#include <unistd.h>
 #include "strutil.h"
 
 typedef void (*_PVFV)();
@@ -273,7 +275,7 @@ namespace msvcrt {
 
 	uint16_t* WIN_ENTRY _wcsdup(const uint16_t *strSource){
 		std::string src_str = wideStringToString(strSource);
-		DEBUG_LOG("_wcsdup: %s", src_str.c_str());
+		// DEBUG_LOG("_wcsdup: %s", src_str.c_str());
 		if(!strSource) return nullptr;
 		size_t strLen = wstrlen(strSource);
 
@@ -285,10 +287,16 @@ namespace msvcrt {
 		}
 
 		std::string dst_str = wideStringToString(dup);
-		DEBUG_LOG(" --> %s\n", dst_str.c_str());
+		// DEBUG_LOG(" --> %s\n", dst_str.c_str());
 		return dup;
 	}
 
+	int WIN_ENTRY _waccess_s(const uint16_t* path, int mode){
+		std::string str = wideStringToString(path);
+		DEBUG_LOG("_waccess_s %s\n", str.c_str());
+		return access(str.c_str(), mode);
+	}
+
 	void* WIN_ENTRY memset(void *s, int c, size_t n){
 		return std::memset(s, c, n);
 	}
@@ -424,6 +432,43 @@ namespace msvcrt {
 		return wstrtoul(strSource, endptr, base);
 	}
 
+	int WIN_ENTRY _dup2(int fd1, int fd2){
+		return dup2(fd1, fd2);
+	}
+
+	FILE* WIN_ENTRY _wfsopen(const uint16_t* filename, const uint16_t* mode, int shflag){
+		if (!filename || !mode) return nullptr;
+		std::string fname_str = wideStringToString(filename);
+		std::string mode_str = wideStringToString(mode);
+		DEBUG_LOG("_wfsopen file %s, mode %s\n", fname_str.c_str(), mode_str.c_str());
+
+		return fopen(fname_str.c_str(), mode_str.c_str());
+	}
+
+	int WIN_ENTRY fputws(const uint16_t* str, FILE* stream){
+		if(!str || !stream) return EOF;
+		
+		std::string fname_str = wideStringToString(str);
+		DEBUG_LOG("fputws %s\n", fname_str.c_str());
+
+		if(fputs(fname_str.c_str(), stream) < 0) return EOF;
+		else return 0;
+	}
+
+	int WIN_ENTRY fclose(FILE* stream){
+		return ::fclose(stream);
+	}
+
+	int WIN_ENTRY _flushall(){
+		DEBUG_LOG("flushall\n");
+		int count = 0;
+
+		if (fflush(stdin) == 0) count++;
+		if (fflush(stdout) == 0) count++;
+		if (fflush(stderr) == 0) count++;
+
+		return count;
+	}
 }
 
 
@@ -466,6 +511,12 @@ static void *resolveByName(const char *name) {
 	if (strcmp(name, "wcschr") == 0) return (void*)msvcrt::wcschr;
 	if (strcmp(name, "getenv") == 0) return (void*)msvcrt::getenv;
 	if (strcmp(name, "_wgetenv_s") == 0) return (void*)msvcrt::_wgetenv_s;
+	if (strcmp(name, "_waccess_s") == 0) return (void*)msvcrt::_waccess_s;
+	if (strcmp(name, "_dup2") == 0) return (void*)msvcrt::_dup2;
+	if (strcmp(name, "_wfsopen") == 0) return (void*)msvcrt::_wfsopen;
+	if (strcmp(name, "fputws") == 0) return (void*)msvcrt::fputws;
+	if (strcmp(name, "fclose") == 0) return (void*)msvcrt::fclose;
+	if (strcmp(name, "_flushall") == 0) return (void*)msvcrt::_flushall;
 	return nullptr;
 }