diff --git a/ThunksList.md b/ThunksList.md
index 7c8bb74..8edd493 100644
--- a/ThunksList.md
+++ b/ThunksList.md
@@ -80,6 +80,11 @@
 | BCryptCloseAlgorithmProvider               | 内部实现。
 | BCryptGenRandom                            | 不存在时调用，RtlGenRandom。
 
+## bcryptprimitives.dll
+| 函数                                       | Fallback
+| ----                                       | -----------
+| ProcessPrng                                | 不存在时调用，RtlGenRandom。
+
 ## bluetoothapis.dll
 | 函数                                       | Fallback
 | ----                                       | -----------
diff --git a/src/Thunks/BCryptPrimitives.hpp b/src/Thunks/BCryptPrimitives.hpp
new file mode 100644
index 0000000..a2a3ce7
--- /dev/null
+++ b/src/Thunks/BCryptPrimitives.hpp
@@ -0,0 +1,41 @@
+
+extern "C" BOOL WINAPI ProcessPrng(
+    _Out_writes_bytes_(_cbBuffer) PUCHAR _pbBuffer,
+    _In_                          ULONG _cbBuffer
+    );
+
+namespace YY
+{
+    namespace Thunks
+    {
+#if (YY_Thunks_Support_Version < NTDDI_WIN6)
+
+		// 最低受支持的客户端	Windows Vista [桌面应用|UWP 应用]
+		// 最低受支持的服务器	Windows Server 2008[桌面应用 | UWP 应用]
+		__DEFINE_THUNK(
+		bcryptprimitives,
+		8,
+		BOOL,
+		WINAPI,
+		ProcessPrng,
+            _Out_writes_bytes_(_cbBuffer) PUCHAR _pbBuffer,
+            _In_                          ULONG _cbBuffer
+            )
+		{
+			if (auto _pfnProcessPrng = try_get_ProcessPrng())
+			{
+				return _pfnProcessPrng(_pbBuffer, _cbBuffer);
+			}
+
+            const auto _pfnRtlGenRandom = try_get_SystemFunction036();
+            if (!_pfnRtlGenRandom)
+            {
+                SetLastError(ERROR_FUNCTION_FAILED);
+                return FALSE;
+            }
+
+            return _pfnRtlGenRandom(_pbBuffer, _cbBuffer);
+		}
+#endif
+    } // namespace Thunks
+} // namespace YY
diff --git a/src/Thunks/YY_Thunks.cpp b/src/Thunks/YY_Thunks.cpp
index ff07a4f..d257f8e 100644
--- a/src/Thunks/YY_Thunks.cpp
+++ b/src/Thunks/YY_Thunks.cpp
@@ -11,6 +11,7 @@
     _APPLY(version,                                      "version"                            , 0                 ) \
 	_APPLY(advapi32,                                     "advapi32"                           , 0                 ) \
 	_APPLY(bcrypt,                                       "bcrypt"                             , 0                 ) \
+	_APPLY(bcryptprimitives,                             "bcryptprimitives"                   , 0                 ) \
     _APPLY(user32,                                       "user32"                             , 0                 ) \
     _APPLY(ws2_32,                                       "ws2_32"                             , 0                 ) \
     _APPLY(shell32,                                      "shell32"                            , 0                 ) \
diff --git a/src/Thunks/bcrypt.hpp b/src/Thunks/bcrypt.hpp
index 2513fd9..45c23d8 100644
--- a/src/Thunks/bcrypt.hpp
+++ b/src/Thunks/bcrypt.hpp
@@ -139,7 +139,7 @@ namespace YY
 		WINAPI,
 		BCryptGenRandom,
 			_In_opt_                        BCRYPT_ALG_HANDLE _hAlgorithm,
-			_Out_writes_bytes_(cbBuffer)    PUCHAR _pbBuffer,
+			_Out_writes_bytes_(_cbBuffer)   PUCHAR _pbBuffer,
 			_In_                            ULONG _cbBuffer,
 			_In_                            ULONG _fFlags
 			)
@@ -180,4 +180,4 @@ namespace YY
 		}
 #endif
 	}
-}
\ No newline at end of file
+}
diff --git a/src/YY-Thunks.UnitTest/YY-Thunks.UnitTest.vcxproj b/src/YY-Thunks.UnitTest/YY-Thunks.UnitTest.vcxproj
index 8f32298..0b19370 100644
--- a/src/YY-Thunks.UnitTest/YY-Thunks.UnitTest.vcxproj
+++ b/src/YY-Thunks.UnitTest/YY-Thunks.UnitTest.vcxproj
@@ -198,6 +198,7 @@
     <ClInclude Include="..\Thunks\api-ms-win-eventing-provider.hpp" />
     <ClInclude Include="..\Thunks\api-ms-win-power-base.hpp" />
     <ClInclude Include="..\Thunks\bcrypt.hpp" />
+    <ClInclude Include="..\Thunks\BCryptPrimitives.hpp" />
     <ClInclude Include="..\Thunks\bluetoothapis.hpp" />
     <ClInclude Include="..\Thunks\dwmapi.hpp" />
     <ClInclude Include="..\Thunks\ext-ms-win-ntuser-powermanagement.hpp" />
diff --git a/src/YY-Thunks.UnitTest/YY-Thunks.UnitTest.vcxproj.filters b/src/YY-Thunks.UnitTest/YY-Thunks.UnitTest.vcxproj.filters
index 7b5dfc2..9e237a7 100644
--- a/src/YY-Thunks.UnitTest/YY-Thunks.UnitTest.vcxproj.filters
+++ b/src/YY-Thunks.UnitTest/YY-Thunks.UnitTest.vcxproj.filters
@@ -236,6 +236,9 @@
     <ClInclude Include="..\Thunks\dwmapi.hpp">
       <Filter>Thunks</Filter>
     </ClInclude>
+    <ClInclude Include="..\Thunks\BCryptPrimitives.hpp">
+      <Filter>Thunks</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="..\def\x86\PSAPI2Kernel32.def">