Add crontab persistence and LoginHook persistence (#29)

* Add crontab persistence

#17

* Shorten URL

* Add LoginHook persistence method

* Add comment for removal

src/persistence/macOS/LoginHook.py

@@ -0,0 +1,37 @@
+# This approach is explained in Patrick Wardle's "Methods of Malware
+# Persistence on macOS" paper on page 18.
+#
+# NOTE: Untested.
+
+
+import os
+import sys
+sys.path.insert(0, "../..")
+from utils.print import *
+from utils.utils import choice
+
+
+def main():
+	action = choice("Establish persistence or remove persistence?", [" Establish", " Remove"])
+
+	if action == "establish":
+		print_blue("Establishing macOS persistence with LoginHook")
+		command = "sudo defaults write com.apple.loginwindow LoginHook"
+		path = input("Enter the path of a script you'd like to run on login.")
+		if not os.path.isfile(path):
+			print_red("ERROR: {} is not a file.".format(path))
+			sys.exit(1)
+
+		# TODO: Print stdout, stderr
+		run_cmd("{} {}".format(command, path))
+		print_green("Persistence established.")
+	elif action == "remove":
+		print_blue("Removing macOS persistence with LoginHook")
+		command = "sudo defaults delete com.apple.loginwindow LoginHook"
+		# TODO: Print stdout, stderr
+		run_cmd("{} {}".format(command))
+		print_green("Persistence removed.")
+
+
+if __name__ == '__main__':
+	main()

src/utils/utils.py

@@ -1,5 +1,7 @@
+import inquirer
 import platform
 import subprocess as sp
+from colorama import Fore, Style
 
 
 def get_os_name():
@@ -16,3 +18,14 @@ def run_cmd(command):
 	else:
 		process = sp.run(command, stdout=sp.PIPE, stderr=sp.DEVNULL)
 	return process
+
+
+def choice(question, choices):
+	"""
+	Displays list of choices and returns the one that was selected.
+	"""
+	choice_prompt = [inquirer.List('choice',
+                             message=Fore.GREEN + Style.BRIGHT + question + Fore.BLUE,
+                             choices=choices)
+	]
+	return inquirer.prompt(choice_prompt).get('choice').strip()