Merge pull request #438 from erikbarzdukas/dev-monitortcp
New module to monitor TCP connectionsmdns
Chris Ross
GitHub
commit
3baad71f09
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@ -0,0 +1,40 @@
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function Start-TCPMonitor {
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[cmdletbinding()]
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Param(
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[Parameter(Mandatory=$true)]
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[String]$TargetDomain,
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[Parameter(Mandatory=$false)]
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[Int]$CheckInterval=30
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)
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Function Get-ActiveTCPConnections {
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try {
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$TCPProperties = [System.Net.NetworkInformation.IPGlobalProperties]::GetIPGlobalProperties()
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$Connections = $TCPProperties.GetActiveTcpConnections()
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return $Connections
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} catch {
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Write-Error "Failed to get active connections. $_"
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return @()
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}
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}
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While(1){
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$TargetDomainResolution = [System.Net.Dns]::GetHostAddresses("$TargetDomain")
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$TargetIPs = New-Object System.Collections.ArrayList
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foreach($i in $TargetDomainResolution ) {
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$TargetIPs.Add($i.IPAddressToString.trim()) >$null 2>&1
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}
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$tcpConns = Get-ActiveTCPConnections
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foreach($Connection in $tcpConns) {
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foreach($IP in $TargetIPs) {
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if( $Connection.RemoteEndPoint.Address.IPAddressToString -eq $IP ) {
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"Host connected to $TargetDomain"
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}
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}
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}
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sleep($CheckInterval)
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}
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}
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@ -0,0 +1,116 @@
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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': 'Start-MonitorTCPConnections',
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# list of one or more authors for the module
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'Author': ['@erikbarzdukas'],
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# more verbose multi-line description of the module
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'Description': ('Monitors hosts for TCP connections to a specified domain name or IPv4 address.'
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' Useful for session hijacking and finding users interacting with sensitive services.'),
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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' : True,
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# the language for this module
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'Language' : 'powershell',
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# The minimum PowerShell version needed for the module to run
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'MinLanguageVersion' : '2',
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# list of any references/other comments
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'Comments': [
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'Based on code from Tim Ferrell.',
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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 monitor from.',
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'Required' : True,
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'Value' : ''
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},
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'TargetDomain' : {
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'Description' : 'Domain name or IPv4 address of target service.',
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'Required' : True,
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'Value' : ''
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},
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'CheckInterval' : {
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'Description' : 'Interval in seconds to check for the connection',
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'Required' : True,
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'Value' : '15'
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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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# the PowerShell script itself, with the command to invoke
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# for execution appended to the end. Scripts should output
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# everything to the pipeline for proper parsing.
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#
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# the script should be stripped of comments, with a link to any
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# original reference script included in the comments.
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# if you're reading in a large, external script that might be updates,
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# use the pattern below
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# read in the common module source code
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moduleSource = self.mainMenu.installPath + "/data/module_source/situational_awareness/host/Start-MonitorTCPConnections.ps1"
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try:
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f = open(moduleSource, 'r')
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except:
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print helpers.color("[!] Could not read module source path at: " + str(moduleSource))
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return ""
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moduleCode = f.read()
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f.close()
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script = moduleCode
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script += "Start-TCPMonitor"
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# add any arguments to the end execution of the script
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for option,values in self.options.iteritems():
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if option.lower() != "agent":
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if values['Value'] and values['Value'] != '':
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if values['Value'].lower() == "true":
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# if we're just adding a switch
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script += " -" + str(option)
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else:
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script += " -" + str(option) + " " + str(values['Value'])
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return script
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