Merge execute-dotnet-assembly-via-clr-host.yml with load-windows-comm…

…on-language-runtime.yml and promote load-windows-common-language-runtime.yml
mandiant · Jul 13, 2023 · 83523e8 · 83523e8
1 parent 85a980a
commit 83523e8
Show file tree

Hide file tree

Showing 3 changed files with 46 additions and 43 deletions.
diff --git a/load-code/dotnet/execute-dotnet-assembly-via-clr-host.yml b/load-code/dotnet/execute-dotnet-assembly-via-clr-host.yml
diff --git a/load-code/dotnet/load-windows-common-language-runtime.yml b/load-code/dotnet/load-windows-common-language-runtime.yml
@@ -0,0 +1,46 @@
+# generated using capa explorer for IDA Pro
+rule:
+  meta:
+    name: load Windows Common Language Runtime
+    namespace: load-code/dotnet
+    authors:
+      - [email protected]
+      - [email protected]
+      - [email protected]
+    scope: function
+    references:
+      - https://modexp.wordpress.com/2019/05/10/dotnet-loader-shellcode/
+      - https://github.com/TheWover/donut/blob/master/loader/inmem_dotnet.c
+    examples:
+      - 6CD1315F6F2FA4F8EE2B98BB3CA0A994:0x140001030
+  features:
+    - or:
+      - and:
+        - description: .NET Framework versions 2.0, 3.0, 3.5
+        - or:
+          - api: mscoree.CorBindToRuntime
+          - api: mscoree.CorBindToRuntimeEx
+          - api: mscoree.CorBindToRuntimeHost
+          - api: mscoree.CorBindToRuntimeByCfg
+          - api: mscoree.CorBindToCurrentRuntime
+          - api: ole32.CoCreateInstance
+          - and:
+            - or:
+              - string: "CorBindToRuntime"
+              - string: "CorBindToRuntimeEx"
+              - string: "CorBindToRuntimeHost"
+              - string: "CorBindToRuntimeByCfg"
+              - string: "CorBindToCurrentRuntime"
+              - string: "CoCreateInstance"
+            - match: link function at runtime on Windows
+        - bytes: 23 67 2F CB 3A AB D2 11 9C 40 00 C0 4F A3 0A 3E = CLSID_CorRuntimeHost
+        - bytes: 22 67 2F CB 3A AB D2 11 9C 40 00 C0 4F A3 0A 3E = IID_ICorRuntimeHost
+      - and:
+        - description: .NET Framework version 4.x
+        - or:
+          - api: mscoree.CLRCreateInstance
+          - and:
+            - string: "CLRCreateInstance"
+            - match: link function at runtime on Windows
+        - bytes: 8D 18 80 92 8E 0E 67 48 B3 0C 7F A8 38 84 E8 DE = CLSID_CLRMetaHost
+        - bytes: 9E DB 32 D3 B3 B9 25 41 82 07 A1 48 84 F5 32 16 = IID_ICLRMetaHost
diff --git a/nursery/load-windows-common-language-runtime.yml b/nursery/load-windows-common-language-runtime.yml