Created
January 14, 2016 21:53
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An example of how to use permanent WMI event subscriptions to log a malicious action to the event log
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# Define the signature - i.e. __EventFilter | |
$EventFilterArgs = @{ | |
EventNamespace = 'root/cimv2' | |
Name = 'LateralMovementEvent' | |
Query = 'SELECT * FROM MSFT_WmiProvider_ExecMethodAsyncEvent_Pre WHERE ObjectPath="Win32_Process" AND MethodName="Create"' | |
QueryLanguage = 'WQL' | |
} | |
$InstanceArgs = @{ | |
Namespace = 'root/subscription' | |
Class = '__EventFilter' | |
Arguments = $EventFilterArgs | |
} | |
$Filter = Set-WmiInstance @InstanceArgs | |
# Define the event log template and parameters | |
$Template = @( | |
'Lateral movement detected!', | |
'Namespace: %Namespace%', | |
'Object: %ObjectPath%', | |
'Method Executed: %MethodName%', | |
'Command Executed: %InputParameters.CommandLine%' | |
) | |
$NtEventLogArgs = @{ | |
Name = 'LogLateralMovementEvent' | |
Category = [UInt16] 0 | |
EventType = [UInt32] 2 # Warning | |
EventID = [UInt32] 8 | |
SourceName = 'WSH' | |
NumberOfInsertionStrings = [UInt32] $Template.Length | |
InsertionStringTemplates = $Template | |
} | |
$InstanceArgs = @{ | |
Namespace = 'root/subscription' | |
Class = 'NTEventLogEventConsumer' | |
Arguments = $NtEventLogArgs | |
} | |
$Consumer = Set-WmiInstance @InstanceArgs | |
$FilterConsumerBingingArgs = @{ | |
Filter = $Filter | |
Consumer = $Consumer | |
} | |
$InstanceArgs = @{ | |
Namespace = 'root/subscription' | |
Class = '__FilterToConsumerBinding' | |
Arguments = $FilterConsumerBingingArgs | |
} | |
# Run the following code from an elevated PowerShell console. | |
# Register the alert | |
$Binding = Set-WmiInstance @InstanceArgs | |
# Now, this will automatically generate an event log entry in the Application event log. | |
Invoke-WmiMethod -Class Win32_Process -Name Create -ArgumentList notepad.exe | |
# Delete the permanent WMI event subscriptions you just made | |
<# | |
Get-WmiObject -Namespace 'root/subscription' -Class '__EventFilter' -Filter 'Name="LateralMovementEvent"' | Remove-WmiObject | |
Get-WmiObject -Namespace 'root/subscription' -Class 'NTEventLogEventConsumer' -Filter 'Name="LogLateralMovementEvent"' | Remove-WmiObject | |
Get-WmiObject -Namespace 'root/subscription' -Class '__FilterToConsumerBinding' -Filter 'Filter="__EventFilter.Name=\"LateralMovementEvent\""' | Remove-WmiObject | |
#> |
Wow, you are indeed a master of batch. Thank you for sharing!
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@mattifestation here is a little batch file to go along with your wmi logs: