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grouper.psm1
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# Grouper - Get-GPOReport XML Parser
<#
.SYNOPSIS
Consumes a Get-GPOReport XML formatted report and outputs potentially vulnerable settings.
.DESCRIPTION
Consumes a Get-GPOReport XML formatted report and outputs potentially vulnerable settings.
GPP cpassword decryption function stolen shamelessly from @harmj0y
Lots of assist from @sysop_host
.EXAMPLE
So first you need to generate a report on a machine with the Group Policy PS module installed. Do that like this:
"Get-GPOReport -All -ReportType XML -Path C:\temp\gporeport.xml"
Then import this module and:
"Invoke-AuditGPOReport -Path C:\temp\gporeport.xml"
-hideDisabled or else by default we just filter out policy objects that aren't enabled or linked anywhere.
-Level (1, 2, or 3) - adjusts whether to show everything (1) or only interesting (2) or only definitely vulnerable (3) settings. Defaults to 2.
-lazyMode (without -Path) will run the initial generation of the GPOReport for you but will need to be running as a domain user on a domain-joined machine.
-blurb will provide a little extra description on why you should care about what you're seeing and what you might want to do with it.
.NOTES
Author : Mike Loss - mike@mikeloss.net
#>
# Some arrays of group names that are 'interesting', either because they are canonically 'low-priv' and huge numbers of accounts will be in them
# or because they are high-priv enough that members are very likely to have privileged access to a host, whole domain or a number of hosts.
# TODO ADD TO THIS LIST
$intPrivLocalGroups = @()
$intPrivLocalGroups += "Administrators"
$intPrivLocalGroups += "Backup Operators"
$intPrivLocalGroups += "Hyper-V Administrators"
$intPrivLocalGroups += "Power Users"
$intPrivLocalGroups += "Print Operators"
$intPrivLocalGroups += "Remote Desktop Users"
$intPrivLocalGroups += "Remote Management Users"
# TODO ADD TO THIS LIST?
$intLowPrivDomGroups = @()
$intLowPrivDomGroups += "Domain Users"
$intLowPrivDomGroups += "Authenticated Users"
$intLowPrivDomGroups += "Everyone"
# TODO ADD TO THIS LIST?
$intLowPrivLocalGroups = @()
$intLowPrivLocalGroups += "Users"
$intLowPrivLocalGroups += "Everyone"
$intLowPrivLocalGroups += "Authenticated Users"
# TODO ADD TO THIS LIST?
$intLowPrivGroups = @()
$intLowPrivGroups += "Domain Users"
$intLowPrivGroups += "Authenticated Users"
$intLowPrivGroups += "Everyone"
$intLowPrivGroups += "Users"
# TODO ADD TO THIS LIST?
$intPrivDomGroups = @()
$intPrivDomGroups += "Domain Admins"
$intPrivDomGroups += "Administrators"
$intPrivDomGroups += "DNS Admins"
$intPrivDomGroups += "Backup Operators"
$intPrivDomGroups += "Enterprise Admins"
$intPrivDomGroups += "Schema Admins"
$intPrivDomGroups += "Server Operators"
$intPrivDomGroups += "Account Operators"
# THIS ONE IS FINE
$intRights = @()
$intRights += "SeTrustedCredManAccessPrivilege"
$intRights += "SeTcbPrivilege"
$intRights += "SeMachineAccountPrivilege"
$intRights += "SeBackupPrivilege"
$intRights += "SeCreateTokenPrivilege"
$intRights += "SeAssignPrimaryTokenPrivilege"
$intRights += "SeRestorePrivilege"
$intRights += "SeDebugPrivilege"
$intRights += "SeTakeOwnershipPrivilege"
$intRights += "SeCreateGlobalPrivilege"
$intRights += "SeLoadDriverPrivilege"
$intRights += "SeRemoteInteractiveLogonRight"
$boringTrustees = @()
$boringTrustees += "BUILTIN\Administrators"
$boringTrustees += "NT AUTHORITY\SYSTEM"
# The blurbs for each check displayed if you run with -blurb enabled.
$blurbs = @{}
$blurbs.Add("Get-GPOEnvVars", "Environment variables being set. Might find something dumb like an API key or a VM.")
$blurbs.Add("Get-GPORegSettings", "A bunch more 'misc' security settings, including all the MS Office settings around macros etc.")
$blurbs.Add("Get-GPOShortcuts", "Creates shortcuts which could provide useful intel on internal applications. Alternatively, if you can modify the target of a shortcut you might be able to replace it with /nasty.")
$blurbs.Add("Get-GPOPerms", "These are the permissions on the Group Policy Object itself. If you have modify rights here, you can take over any user or computer that the policy applies to.")
$blurbs.Add("Get-GPOUsers", "Entries in here add, change, or remove local users from hosts. If you see a password in here that's probably bad.")
$blurbs.Add("Get-GPOGroups", "These entries make changes to local groups on the hosts. If someone has been added to a highly privileged group that might be useful to you?")
$blurbs.Add("Get-GPOUserRights", "This is where you'll see users and groups being assigned interesting privileges on hosts. Google the name of the right being assigned if you wanna know what it does.")
$blurbs.Add("Get-GPOSchedTasks", "These are scheduled tasks being pushed to hosts. Sometimes they have credentials and stuff in them?")
$blurbs.Add("Get-GPOMSIInstallation", "These are MSI files that are being installed via group policy. If you can replace one of them with something nasty you could probably do something evil?")
$blurbs.Add("Get-GPOScripts", "These are startup and shutdown scripts, that kind of thing. If you can edit one you can probably have a nice time?")
$blurbs.Add("Get-GPOFileUpdate", "These are all changes being made to files on the target system, either adding new ones, removing existing ones, or updating existing ones. If you can modify the source files you o have a nice time, depending on the file type, if it ever gets executed, etc.")
$blurbs.Add("Get-GPOFilePerms", "These entries modify file permissions on the target host's file system. Could be useful for identifying privesc vulns, that kind of thing.")
$blurbs.Add("Get-GPOSecurityOptions", "A lot of these are kind of 'misc' security settings, you'll need to google individual items to understand what each means. If you want Grouper to provide more detail, I eagerly ll request.")
$blurbs.Add("Get-GPORegKeys", "These are reg keys that are being pushed to target hosts. If they show up in -Level 3 or 2 they're worth a closer look as they probably contain credentials. If you think this ore detail... I eagerly await your pull request.")
$blurbs.Add("Get-GPONetworkShares", "Defines file shares that should be created on target hosts. Handy recon data basically.")
$blurbs.Add("Get-GPOFWSettings", "Windows Firewall settings. Might be useful for identifying why a payload isn't working, or which servers are hosting what apps if that's otherwise difficult.")
$blurbs.Add("Get-GPOIniFiles", "Ini files are an old timey way of doing Windows app configs. You might find some creds in here?")
$blurbs.Add("Get-GPOAccountSettings", "These are all the settings that define stuff like password policy, some options for how passwords are stored, that kind of thing.")
#____________________ GPO Check functions _______________
# There's a whole pile of these functions. Each one consumes a single <GPO> object from a Get-GPOReport XML report,
# then depending on the -Level parameter it should output interesting/vulnerable/any policy it can process.
# The rule of thumb for whether a check function should exist at all is "Does this class of policy have any possible settings with security impact?"
# The rule of thumb for whether a setting is "Vulnerable" enough for Level 3 is "If it is likely to result in large numbers of users or the current user
# being able to get a shell or an RDP session on a host".
# The rule of thumb for whether a setting is "Interesting" enough for Level 2 is "if it could meet the criteria for Level 3 but Grouper can't tell
# whether it does without user intervention."
# At the moment Level 1 is pretty much just showing all the settings that Grouper can parse, but in the future it should filter out settings that
# have been configured 'securely', where there is a clear best-practice option.
Function Get-GPOUsers {
[cmdletbinding()]
# Consumes a single <GPO> object from a Get-GPOReport XML report.
######
# Description: Checks for changes made to local users.
# Level 3: Only show instances where a password has been set, i.e. GPP Passwords.
# Level 2: All users and all changes.
# Level 1: All users and all changes.
######
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
$GPOisinteresting = $false
$GPOisvulnerable = $false
# Grab an array of the settings we're interested in from the GPO.
$settingsUsers = ($polXml.ExtensionData.Extension.LocalUsersAndGroups.User | Sort-Object GPOSettingOrder)
# Check if there's actually anything in the array.
if ($settingsUsers) {
$output = @{}
# Iterate over array of settings, writing out only those we care about.
foreach ($setting in $settingsUsers) {
#see if we have any stored encrypted passwords
$cpasswordcrypt = $setting.properties.cpassword
if ($cpasswordcrypt) {
$GPOisvulnerable = $true
# decrypt it with harmj0y's function
$cpasswordclear = Get-DecryptedCpassword -Cpassword $cpasswordcrypt
}
#if so, or if we're showing boring, show the rest of the setting
if (($cpasswordcrypt) -Or ($level -le 2)) {
$GPOisinteresting = $true
$output = @{}
$output.Add("Name", $setting.Name)
$output.Add("New Name", $setting.properties.NewName)
$output.Add("Description", $setting.properties.Description)
$output.Add("changeLogon", $setting.properties.changeLogon)
$output.Add("noChange", $setting.properties.noChange)
$output.Add("neverExpires", $setting.properties.neverExpires)
$output.Add("Disabled", $setting.properties.acctDisabled)
$output.Add("UserName", $setting.properties.userName)
$output.Add("Password", $($cpasswordclear, "Password Not Set" -ne $null)[0])
Write-NoEmpties -output $output
}
}
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
if ($GPOisvulnerable) {
$Global:GPOsWithVulnSettings += 1
}
}
Function Get-GPOGroups {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for changes made to local groups.
# Level 3: If Domain Users, Everyone, Authenticated Users get added to 'interesting groups'.
# Level 2: Show changes to groups that grant meaningful security-relevant access.
# Level 1: All groups and all changes.
######
$GPOIsInteresting = $false
$GPOIsVulnerable = $false
$settingsGroups = ($polXml.ExtensionData.Extension.LocalUsersAndGroups.Group | Sort-Object GPOSettingOrder)
if ($settingsGroups) {
foreach ($setting in $settingsGroups) {
$settingIsInteresting = $false
$settingIsVulnerable = $false
$groupIsInteresting = $false
# check if the group being modified is one of the high-priv local groups array,
$groupName = $setting.properties.groupName
if ($intPrivLocalGroups -Contains $groupName) {
$GPOIsInteresting = $true
$settingIsInteresting = $true
$groupIsInteresting = $true
}
# if it's in that array AND a member being modified is a low-priv domain group, we flag the setting as vulnerable.
$groupmembers = $setting.properties.members.member
foreach ($groupmember in $groupmembers) {
$groupMemberName = $groupmember.name
foreach ($lowPrivDomGroup in $intLowPrivDomGroups) {
if (($groupMemberName -match $lowPrivDomGroup) -And ($groupIsInteresting)){
$settingIsVulnerable = $true
$GPOIsVulnerable = $true
}
}
}
if ((($settingIsVulnerable) -And ($level -le 3)) -Or (($settingIsInteresting) -And ($level -le 2)) -Or ($level -eq 1)) {
$output = @{}
$output.Add("Name", $setting.Name)
$output.Add("NewName", $setting.properties.NewName)
$output.Add("Description", $setting.properties.Description)
$output.Add("Group Name", $groupName)
Write-NoEmpties -output $output
foreach ($member in $setting.properties.members.member) {
$output = @{}
$output.Add("Name", $member.name)
$output.Add("Action", $member.action)
$output.Add("UserName", $member.userName)
Write-NoEmpties -output $output
}
}
}
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
if ($GPOIsVulnerable) {
$Global:GPOsWithVulnSettings += 1
}
}
Function Get-GPOUserRights {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for user rights granted to users and groups.
# Level 3: Only show "Interesting" rights, i.e. those that can be used for local privilege escalation or remote access,
# and only if they've been assigned to Domain Users, Authenticated Users, or Everyone.
# Level 2: Only show "Interesting" rights, i.e. those that can be used for local privilege escalation or remote access.
# Level 1: All non-default.
######
$GPOIsInteresting = $false
$GPOIsVulnerable = $false
$uraSettings = ($polXml.Computer.ExtensionData.Extension.UserRightsAssignment)
$uraSettings = ($uraSettings | ? {$_}) #Strips null elements from array - nfi why I was getting so many of these.
if ($uraSettings) {
foreach ($setting in $uraSettings) {
$settingIsInteresting = $false
$settingIsVulnerable = $false
$rightIsInteresting = $false
$userRight = $setting.Name
$members = @()
foreach ($member in $setting.Member) {
$members += ($member.Name.Innertext)
}
# if the right being assigned is in our array of interesting rights, the setting is interesting.
if ($intRights -contains $userRight) {
$GPOisinteresting = $true
$settingIsInteresting = $true
$rightIsInteresting = $true
}
# then we construct an array of trustees being granted the right, so we can see if they are in any of our interesting low priv groups.
if ($rightIsInteresting) {
foreach ($lowPrivGroup in $intLowPrivGroups) {
foreach ($member in $members) {
if ($member -match $lowPrivGroup) {
$GPOIsVulnerable = $true
$settingIsVulnerable = $true
}
}
}
}
if ((($settingIsVulnerable) -And ($level -le 3)) -Or (($settingIsInteresting) -And ($level -le 2)) -Or ($level -eq 1)) {
$output = @{}
$output.Add("Right", $userRight)
$output.Add("Members", $members -join ',')
Write-NoEmpties -output $output
}
}
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
if ($GPOIsVulnerable) {
$Global:GPOsWithVulnSettings += 1
}
}
Function Get-GPOSchedTasks {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for scheduled tasks being configured on a host.
# Level 3: Only show instances where a password has been set.
# Level 2: TODO If a password has been set or the thing being run is non-local or there are arguments set.
# Level 1: All scheduled tasks.
######
$GPOisinteresting = $false
$GPOisvulnerable = $false
$tasktypes = @()
$tasktypes += $polXml.ExtensionData.Extension.ScheduledTasks.Task
$tasktypes += $polXml.ExtensionData.Extension.ScheduledTasks.ImmediateTask
$tasktypes += $polXml.ExtensionData.Extension.ScheduledTasks.TaskV2
$settingsSchedTasks = $tasktypes | Sort-Object GPOSettingOrder
if ($settingsSchedTasks) {
foreach ($setting in $settingsSchedTasks) {
#see if we have any stored encrypted passwords
$cpasswordcrypt = $setting.properties.cpassword
if ($cpasswordcrypt) {
$GPOisvulnerable = $true
$GPOisinteresting = $true
# decrypt it with harmj0y's function
$cpasswordclear = Get-DecryptedCpassword -Cpassword $cpasswordcrypt
}
#see if any arguments have been set
$taskArgs = $setting.Properties.args
if ($taskArgs) {
$GPOisinteresting = $true
}
#if so, or if we're showing everything, or if there are args and we're at level 2, show the setting.
if ((($cpasswordcrypt) -And ($level -le 3)) -Or ($level -le 2)) {
$output = @{}
$output.Add("Name", $setting.Properties.name)
$output.Add("runAs", $setting.Properties.runAs)
$output.Add("Password", $($cpasswordclear, "Password Not Set" -ne $null)[0])
$output.Add("Action", $setting.Properties.action)
$output.Add("appName", $setting.Properties.appName)
$output.Add("args", $setting.Properties.args)
$output.Add("startIn", $setting.Properties.startIn)
Write-NoEmpties -output $output
if ($setting.Properties.Triggers) {
foreach ($trigger in $setting.Properties.Triggers) {
$output = @{}
$output.Add("type", $trigger.Trigger.type)
$output.Add("startHour", $trigger.Trigger.startHour)
$output.Add("startMinutes", $trigger.Trigger.startMinutes)
Write-NoEmpties -output $output
}
}
}
}
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
if ($GPOisvulnerable) {
$Global:GPOsWithVulnSettings += 1
}
}
Function Get-GPOMSIInstallation {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for MSI installers being used to install software.
# Level 3: TODO Only show instances where the file is writable by the current user or 'Everyone' or 'Domain Users' or 'Authenticated Users'.
# Level 2: All MSI installations.
# Level 1: All MSI installations.
######
$MSIInstallation = ($polXml.ExtensionData.Extension.MsiApplication | Sort-Object GPOSettingOrder)
if ($MSIInstallation) {
$GPOisinteresting = $true
$GPOisvulnerable = $false
foreach ($setting in $MSIInstallation) {
$output = @{}
$MSIPath = $setting.Path
$output.Add("Name", $setting.Name)
$output.Add("Path", $MSIPath)
if ($Global:onlineChecks) {
if ($MSIPath.StartsWith("\\")) {
$ACLData = Find-IntACL -Path $MSIPath
$output.Add("Owner",$ACLData["Owner"])
if ($ACLData["Vulnerable"] -eq "True") {
$settingIsVulnerable = $true
$GPOisvulnerable = $true
$output.Add("[!]", "Source file writable by current user!")
}
$MSIPathAccess = $ACLData["Trustees"]
}
}
if (($level -le 2) -Or (($level -le 3) -And ($settingisVulnerable))) {
Write-NoEmpties -output $output
""
if ($MSIPathAccess) {
Write-Title -Text "Permissions on source file:" -DividerChar "-"
Write-Output $MSIPathAccess
""
}
}
}
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
if ($GPOisvulnerable) {
$Global:GPOsWithVulnSettings += 1
}
}
Function Get-GPOScripts {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for startup/shutdown/logon/logoff scripts.
# Level 3: TODO Only show instances where the file is writable by the current user or 'Everyone' or 'Domain Users' or 'Authenticated Users'.
# Level 2: All scripts.
# Level 1: All scripts.
######
$settingsScripts = ($polXml.ExtensionData.Extension.Script | Sort-Object GPOSettingOrder)
if ($settingsScripts) {
$GPOisinteresting = $true
$GPOisvulnerable = $false
foreach ($setting in $settingsScripts) {
$commandPath = $setting.Command
$output = @{}
$output.Add("Command", $commandPath)
$output.Add("Type", $setting.Type)
$output.Add("Parameters", $setting.Parameters)
$settingIsVulnerable = $false
if ($Global:onlineChecks) {
if ($commandPath.StartsWith("\\")) {
$ACLData = Find-IntACL -Path $commandPath
$output.Add("Owner",$ACLData["Owner"])
if ($ACLData["Vulnerable"] -eq "True") {
$settingIsVulnerable = $true
$GPOisvulnerable = $true
$output.Add("[!]", "Source file writable by current user!")
}
$commandPathAccess = $ACLData["Trustees"]
}
}
if (($level -le 2) -Or (($level -le 3) -And ($settingisVulnerable))) {
Write-NoEmpties -output $output
""
if ($commandPathAccess) {
Write-Title -Text "Permissions on source file:" -DividerChar "-"
Write-Output $commandPathAccess
""
}
}
}
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
if ($GPOisvulnerable) {
$Global:GPOsWithVulnSettings += 1
}
}
Function Get-GPOFileUpdate {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for files being copied/updated/whatever.
# Level 3: TODO Only show instances where the 'fromPath' file is writable by the current user or 'Everyone' or 'Domain Users' or 'Authenticated Users'.
# Level 2: All File Updates where FromPath is a network share
# Level 1: All File Updates.
######
$settingsFiles = ($polXml.ExtensionData.Extension.FilesSettings | Sort-Object GPOSettingOrder)
if ($settingsFiles) {
$GPOisinteresting = $true
$GPOisvulnerable = $false
foreach ($setting in $settingsFiles.File) {
$fromPath = $setting.Properties.fromPath
$targetPath = $setting.Properties.targetPath
$output = @{}
$output.Add("Name", $setting.name)
$output.Add("Action", $setting.Properties.action)
$output.Add("fromPath", $fromPath)
$output.Add("targetPath", $targetPath)
$settingIsVulnerable = $false
if ($Global:onlineChecks) {
if ($fromPath.StartsWith("\\")) {
$ACLData = Find-IntACL -Path $fromPath
$output.Add("Owner",$ACLData["Owner"])
if ($ACLData["Vulnerable"] -eq "True") {
$settingIsVulnerable = $true
$GPOisvulnerable = $true
$output.Add("[!]", "Source file writable by current user!")
}
$fromPathAccess = $ACLData["Trustees"]
}
}
if (($level -le 2) -Or (($level -le 3) -And ($settingisVulnerable))) {
Write-NoEmpties -output $output
""
if ($fromPathAccess) {
Write-Title -Text "Permissions on source file:" -DividerChar "-"
Write-Output $fromPathAccess
""
}
}
}
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
if ($GPOisvulnerable) {
$Global:GPOsWithVulnSettings += 1
}
}
Function Get-GPOFilePerms {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for changes to local file permissions.
# Level 3: TODO Only show instances where the file is writable by the current user or 'Everyone' or 'Domain Users' or 'Authenticated Users'.
# Level 2: TODO Also show instances where any user/group other than the usual default Domain/Enterprise Admins has 'Full Control'.
# Level 1: All file permission changes.
######
$settingsFilePerms = ($polXml.Computer.ExtensionData.Extension.File | Sort-Object GPOSettingOrder)
if ($settingsFilePerms) {
foreach ($setting in $settingsFilePerms) {
if ($level -eq 1) {
$output = @{}
$output.Add("Path", $setting.Path)
$output.Add("SDDL", $setting.SecurityDescriptor.SDDL.innertext)
Write-NoEmpties -output $output
}
}
}
}
Function Get-GPOSecurityOptions {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for potentially vulnerable "Security Options" settings.
# Level 3: TODO.
# Level 2: Show everything that matches $intKeyNames or $intSysAccPolName.
# Level 1: All settings.
######
$GPOisinteresting = $false
$settingsSecurityOptions = ($polXml.Computer.ExtensionData.Extension.SecurityOptions | Sort-Object GPOSettingOrder)
if ($settingsSecurityOptions) {
if ($level -le 2) {
$intKeyNameBools = @{}
$intKeyNameBools.Add("MACHINE\System\CurrentControlSet\Control\Lsa\DisableDomainCreds", "false")
$intKeyNameBools.Add("MACHINE\System\CurrentControlSet\Control\Lsa\EveryoneIncludesAnonymous", "true")
$intKeyNameBools.Add("MACHINE\System\CurrentControlSet\Control\Lsa\LimitBlankPasswordUse", "false")
$intKeyNameBools.Add("MACHINE\System\CurrentControlSet\Control\Lsa\NoLMHash", "false")
$intKeyNameBools.Add("MACHINE\System\CurrentControlSet\Control\Lsa\RestrictAnonymous", "false")
$intKeyNameBools.Add("MACHINE\System\CurrentControlSet\Control\Lsa\RestrictAnonymousSAM", "false")
$intKeyNameBools.Add("MACHINE\System\CurrentControlSet\Control\Lsa\SubmitControl", "true")
$intKeyNameBools.Add("MACHINE\System\CurrentControlSet\Control\Lsa\UseMachineId", "true")
$intKeyNameBools.Add("MACHINE\System\CurrentControlSet\Control\Print\Providers\LanMan Print Services\Servers\AddPrinterDrivers", "false")
$intKeyNameLists = @()
$intKeyNameLists += "MACHINE\System\CurrentControlSet\Control\SecurePipeServers\Winreg\AllowedExactPaths\Machine"
$intKeyNameLists += "MACHINE\System\CurrentControlSet\Control\SecurePipeServers\Winreg\AllowedPaths\Machine"
$intKeyNameLists += "MACHINE\System\CurrentControlSet\Services\LanManServer\Parameters\NullSessionPipes"
$intKeyNameLists += "MACHINE\System\CurrentControlSet\Services\LanManServer\Parameters\NullSessionShares"
$intKeyNameLists += "MACHINE\System\CurrentControlSet\Services\LanManServer\Parameters\RestrictNullSessAccess"
$intSysAccPolBools = @{}
$intSysAccPolBools.Add("EnableGuestAccount", 1)
$intSysAccPolBools.Add("EnableAdminAccount", 1)
$intSysAccPolBools.Add("LSAAnonymousNameLookup", 1)
$intSysAccPolStrings = @{}
$intSysAccPolStrings.Add("NewAdministratorName", "")
$intSysAccPolStrings.Add("NewGuestName", "")
foreach ($setting in $settingsSecurityOptions) {
#Check if it's a registry based option
if ($setting.KeyName) {
$keyname = $setting.KeyName
$output = @{}
$values = @{}
$foundit = 0
if ($foundit -eq 0) {
if ($intKeyNameLists -contains $keyname) {
$GPOisinteresting = $true
$foundit = 1
$output.Add("Name", $setting.Display.Name)
$output.Add("KeyName", $setting.KeyName)
$dispstrings = $setting.Display.DisplayStrings.Value
#here we have to iterate over the list of values
$i = 0
foreach ($dispstring in $dispstrings) {
$values.Add("Path/Pipe$i", $dispstring)
$i += 1
}
Write-NoEmpties -output $output
Write-NoEmpties -output $values
}
}
if ($foundit -eq 0) {
foreach ($intKeyNameBool in $intKeyNamesBools) {
if (($keyNameBool.ContainsKey($keyname)) -And ($keyNameBool.ContainsValue($setting.Display.DisplayBoolean))) {
$GPOIsInteresting =1
$foundit = 1
$output.Add("Name", $setting.Display.Name)
$output.Add("KeyName", $setting.KeyName)
$values.Add("DisplayBoolean", $setting.Display.Displayboolean)
Write-NoEmpties -output $output
Write-NoEmpties -output $values
}
}
}
}
# or a 'system access policy name'
elseif ($setting.SystemAccessPolicyName) {
$output = @{}
foreach ($SAP in $intSysAccPolBools) {
if (($SAP.ContainsKey($setting.SystemAccessPolicyName)) -And ($SAP.ContainsValue($setting.SettingNumber))) {
$output.Add("Name", $setting.SystemAccessPolicyName)
$output.Add("SettingNumber",$setting.SettingNumber)
$GPOisinteresting = $true
Write-NoEmpties -output $output
}
}
foreach ($SAP in $intSysAccPolStrings) {
if ($SAP.ContainsKey($setting.SystemAccessPolicyName)) {
$output.Add("Name", $setting.SystemAccessPolicyName)
$output.Add("SettingString",$setting.SettingString)
$GPOisinteresting = $true
Write-NoEmpties -output $output
}
}
}
}
}
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
}
Function Get-GPORegKeys {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for registry keys being set that may contain sensitive information.
# Level 3: Any key that matches '$intKeys'.
# Level 2: TODO Also show instances containing the strings 'pass', 'pwd', 'cred', or 'vnc'.
# Level 1: All Registry Keys
######
$GPOisinteresting = $false
$GPOisvulnerable = $false
$settingsRegKeys = ($polXml.ExtensionData.Extension.RegistrySettings.Registry | Sort-Object GPOSettingOrder)
$vulnKeys = @()
$vulnKeys += "Software\Network Associates\ePolicy Orchestrator"
$vulnKeys += "SOFTWARE\FileZilla Server"
$vulnKeys += "SOFTWARE\Wow6432Node\FileZilla Server"
$vulnKeys += "Software\Wow6432Node\McAfee\DesktopProtection - McAfee VSE"
$vulnKeys += "Software\McAfee\DesktopProtection - McAfee VSE"
$vulnKeys += "Software\ORL\WinVNC3"
$vulnKeys += "Software\ORL\WinVNC3\Default"
$vulnKeys += "Software\ORL\WinVNC\Default"
$vulnKeys += "Software\RealVNC\WinVNC4"
$vulnKeys += "Software\RealVNC\Default"
$vulnKeys += "Software\TightVNC\Server"
$vulnKeys += "SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon"
$intWords = @()
$intWords += "vnc"
$intWords += "vpn"
$intWords += "pwd"
$intWords += "cred"
$intWords += "key"
$intWords += "pass"
if ($settingsRegKeys) {
foreach ($setting in $settingsRegKeys) {
$settingkey = $setting.Properties.key
$settingisInteresting = $false
$settingIsVulnerable = $false
if ($vulnKeys -Contains $settingkey) {
$GPOisvulnerable = $true
$settingIsVulnerable = $true
}
foreach ($intWord in $intWords) {
# if either key or value include our interesting words as a substring, mark the setting as interesting
if (($settingkey -match $intWord) -Or ($settingValue -match $intWord)) {
$GPOisinteresting = $true
$settingisInteresting = $true
}
}
# if setting matches any of our criteria for printing (combined interest level + output level)
if ((($settingisVulnerable) -And ($level -le 3)) -Or (($settingisInteresting) -And ($level -le 2)) -Or ($level -eq 1)) {
$output = @{}
$output.Add("Key", $settingkey)
$output.Add("Action", $setting.Properties.action)
$output.Add("Hive", $setting.Properties.hive)
$output.Add("Name", $setting.Properties.name)
$output.Add("Value", $setting.Properties.value)
Write-NoEmpties -output $output
}
}
}
# update the global counters
if ($GPOisivulnerable) {
$Global:GPOsWithVulnSettings += 1
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
}
Function Get-GPOFolderRedirection {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for user Folder redirections.
# Level 3: TODO Only show instances where DestPath is writable by the current user or 'Everyone' or 'Domain Users' or 'Authenticated Users'.
# Level 2: TODO Also show instances where any user/group other than the usual default Domain/Enterprise Admins has 'Full Control'.
# Level 1: All Folder Redirection.
######
$settingsFolderRedirection = ($polXml.User.ExtensionData.Extension.Folder | Sort-Object GPOSettingOrder)
if ($settingsFolderRedirection) {
foreach ($setting in $settingsFolderRedirection) {
if ($level -eq 1) {
$output = @{}
$output.Add("DestPath", $setting.Location.DestinationPath)
$output.Add("Target Group", $setting.Location.SecurityGroup.Name.innertext)
$output.Add("Target SID", $setting.Location.SecurityGroup.SID.innertext)
$output.Add("ID", $setting.Id)
Write-NoEmpties -output $output
}
}
}
}
Function Get-GPOAccountSettings {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for Account Settings.
# Level 3: TODO
# Level 2: If it matches our list of interesting settings - undecided if i want to include weak password policy here.
# Level 1: All Account Settings.
######
$settingsAccount = ($polXml.Computer.ExtensionData.Extension.Account | Sort-Object GPOSettingOrder)
$GPOisinteresting = $false
$intAccSettingBools = @{}
$intAccSettingBools.Add("ClearTextPassword","true")
if ($settingsAccount) {
foreach ($setting in $settingsAccount) {
$settingName = $setting.Name
$settingisInteresting = $false
foreach ($intAccSetting in $intAccSettingBools) {
if (($intAccSetting.ContainsKey($settingName)) -And ($intAccSetting.containsValue($setting.SettingBoolean))) {
$settingisInteresting = $true
$GPOisinteresting = $true
}
}
if (($level -eq 1) -Or (($settingisInteresting) -And ($level -le 2))) {
$output = @{}
$output.Add("Name", $settingName)
if ($setting.SettingBoolean) {
$output.Add("SettingBoolean", $setting.SettingBoolean)
}
if ($setting.SettingNumber) {
$output.Add("SettingNumber", $setting.SettingNumber)
}
$output.Add("Type", $setting.Type)
Write-NoEmpties -output $output
}
}
}
# update the global counters
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
}
Function Get-GPOFolders {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for creation/renaming of local folders
# Level 3: TODO
# Level 2: TODO Need to generate a list of 'interesting' settings.
# Level 1: All folders changes.
######
$settingsFolders = ($polXml.ExtensionData.Extension.Folders.Folder | Sort-Object GPOSettingOrder)
if ($settingsFolders) {
foreach ($setting in $settingsFolders) {
if ($level -eq 1) {
$output = @{}
$output.Add("Name", $setting.name)
$output.Add("Action", $setting.Properties.action)
$output.Add("Path", $setting.Properties.path)
Write-NoEmpties -output $output
}
}
}
}
Function Get-GPONetworkShares {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for Network Shares being created on hosts.
# Level 3: TODO
# Level 2: All Network Shares.
# Level 1: All Network Shares.
######
$GPOisinteresting = $false
$settingsNetShares = ($polXml.Computer.ExtensionData.Extension.NetworkShares.Netshare | Sort-Object GPOSettingOrder)
if ($settingsNetShares) {
foreach ($setting in $settingsNetShares) {
if ($level -le 2) {
$GPOisinteresting = $true
$output = @{}
$output.Add("Name", $setting.name)
$output.Add("Action", $setting.Properties.action)
$output.Add("PropName", $setting.Properties.name)
$output.Add("Path", $setting.Properties.path)
$output.Add("Comment", $setting.Properties.comment)
Write-NoEmpties -output $output
}
}
}
if ($GPOisinteresting) {
$Global:GPOsWithIntSettings += 1
}
}
Function Get-GPOFWSettings {
[cmdletbinding()]
Param (
[Parameter(Mandatory=$true)][ValidateNotNullOrEmpty()][System.Xml.XmlElement]$polXML,
[Parameter(Mandatory=$true)][ValidateSet(1,2,3)][int]$level
)
######
# Description: Checks for changes to Firewall Rules.
# Level 3: TODO
# Level 2: TODO
# Level 1: Show all Firewall settings
######
if ($level -le 2) {
if ($polXml.Computer.ExtensionData.Extension.PrivateProfile.EnableFirewall -ne $null) {
$output = [ordered]@{}
$output.Add("Firewall Profile","PrivateProfile")
$output.Add("DefaultInboundAction",$polXml.Computer.ExtensionData.Extension.PrivateProfile.DefaultInboundAction.Value)
$output.Add("DefaultOutboundAction",$polXml.Computer.ExtensionData.Extension.PrivateProfile.DefaultOutboundAction.Value)
$output.Add("EnableFirewall",$polXml.Computer.ExtensionData.Extension.PrivateProfile.EnableFirewall.Value)
Write-NoEmpties -output $output
""
}
if ($polXml.Computer.ExtensionData.Extension.PublicProfile.EnableFirewall -ne $null) {
$output = [ordered]@{}
$output.Add("Firewall Profile","PublicProfile")
$output.Add("DefaultInboundAction",$polXml.Computer.ExtensionData.Extension.PublicProfile.DefaultInboundAction.Value)
$output.Add("DefaultOutboundAction",$polXml.Computer.ExtensionData.Extension.PublicProfile.DefaultOutboundAction.Value)
$output.Add("EnableFirewall",$polXml.Computer.ExtensionData.Extension.PublicProfile.EnableFirewall.Value)
Write-NoEmpties -output $output
""
}