Add busybox

_gtfobins/busybox.md

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+---
+description: BusyBox may contain many UNIX utilities, run `busybox --list-full` to check what GTFBins binaries are supported. Here some example.
+functions:
+  execute-interactive:
+    - code: busybox sh
+  sudo-enabled:
+    - code: sudo busybox sh
+  suid-enabled:
+    - description: It may drop the SUID privileges depending on the compilation flags and the runtime configuration.
+      code: ./busybox sh
+  file-read:
+    - code: |
+        LFILE=file_to_read
+        ./busybox cat "$LFILE"
+  file-write:
+    - code: |
+        LFILE=file_to_write
+        busybox sh -c 'echo "data" > $LFILE'
+  upload:
+  - description: Serve files in the local folder running an HTTP server.
+    code: |
+      export LPORT=12345
+      busybox httpd -f -p $LPORT -h .
+---