Windows Binaries Lolbins Renamed
| Id | cbf6ad48-fa5c-4bf7-b205-28dbadb91255 |
| Rulename | Windows Binaries Lolbins Renamed |
| Description | This query detects the execution of renamed Windows binaries (Lolbins). This is a common technique used by adversaries to evade detection. Ref: https://docs.paloaltonetworks.com/cortex/cortex-xdr/cortex-xdr-analytics-alert-reference/cortex-xdr-analytics-alert-reference/execution-of-renamed-lolbin.html |
| Severity | Medium |
| Tactics | Execution |
| Techniques | T1059 |
| Required data connectors | SecurityEvents WindowsSecurityEvents |
| Kind | Scheduled |
| Query frequency | 1h |
| Query period | 1h |
| Trigger threshold | 0 |
| Trigger operator | gt |
| Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Endpoint Threat Protection Essentials/Analytic Rules/WindowsBinariesLolbinsRenamed.yaml |
| Version | 1.0.3 |
| Arm template | cbf6ad48-fa5c-4bf7-b205-28dbadb91255.json |
let procList = externaldata(Process:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Microsoft_Lolbas_Execution_Binaries.csv"] with (format="csv", ignoreFirstRecord=True);
Event
| where EventLog =~ "Microsoft-Windows-Sysmon/Operational" and EventID==1
| parse EventData with * 'Image">' Image "<" * 'OriginalFileName">' OriginalFileName "<" *
| where OriginalFileName has_any (procList) and not (Image has_any (procList))
| parse EventData with * 'ProcessGuid">' ProcessGuid "<" * 'Description">' Description "<" * 'CommandLine">' CommandLine "<" * 'CurrentDirectory">' CurrentDirectory "<" * 'User">' User "<" * 'LogonGuid">' LogonGuid "<" * 'Hashes">' Hashes "<" * 'ParentProcessGuid">' ParentProcessGuid "<" * 'ParentImage">' ParentImage "<" * 'ParentCommandLine">' ParentCommandLine "<" * 'ParentUser">' ParentUser "<" *
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by EventID, Computer, User, ParentImage, ParentProcessGuid, ParentCommandLine, ParentUser, Image, ProcessGuid, CommandLine, Description, OriginalFileName, CurrentDirectory, Hashes
| extend HostName = iif(Computer has '.',substring(Computer,0,indexof(Computer,'.')),Computer) , DnsDomain = iif(Computer has '.',substring(Computer,indexof(Computer,'.')+1),'')
relevantTechniques:
- T1059
name: Windows Binaries Lolbins Renamed
requiredDataConnectors:
- dataTypes:
- SecurityEvent
connectorId: SecurityEvents
- dataTypes:
- SecurityEvent
connectorId: WindowsSecurityEvents
entityMappings:
- fieldMappings:
- identifier: CommandLine
columnName: CommandLine
entityType: Process
- fieldMappings:
- identifier: FullName
columnName: Computer
- identifier: HostName
columnName: HostName
- identifier: DnsDomain
columnName: DnsDomain
entityType: Host
- fieldMappings:
- identifier: Name
columnName: User
entityType: Account
triggerThreshold: 0
id: cbf6ad48-fa5c-4bf7-b205-28dbadb91255
tactics:
- Execution
version: 1.0.3
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Endpoint Threat Protection Essentials/Analytic Rules/WindowsBinariesLolbinsRenamed.yaml
queryPeriod: 1h
kind: Scheduled
queryFrequency: 1h
severity: Medium
status: Available
description: |
'This query detects the execution of renamed Windows binaries (Lolbins). This is a common technique used by adversaries to evade detection.
Ref: https://docs.paloaltonetworks.com/cortex/cortex-xdr/cortex-xdr-analytics-alert-reference/cortex-xdr-analytics-alert-reference/execution-of-renamed-lolbin.html'
query: |
let procList = externaldata(Process:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Microsoft_Lolbas_Execution_Binaries.csv"] with (format="csv", ignoreFirstRecord=True);
Event
| where EventLog =~ "Microsoft-Windows-Sysmon/Operational" and EventID==1
| parse EventData with * 'Image">' Image "<" * 'OriginalFileName">' OriginalFileName "<" *
| where OriginalFileName has_any (procList) and not (Image has_any (procList))
| parse EventData with * 'ProcessGuid">' ProcessGuid "<" * 'Description">' Description "<" * 'CommandLine">' CommandLine "<" * 'CurrentDirectory">' CurrentDirectory "<" * 'User">' User "<" * 'LogonGuid">' LogonGuid "<" * 'Hashes">' Hashes "<" * 'ParentProcessGuid">' ParentProcessGuid "<" * 'ParentImage">' ParentImage "<" * 'ParentCommandLine">' ParentCommandLine "<" * 'ParentUser">' ParentUser "<" *
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by EventID, Computer, User, ParentImage, ParentProcessGuid, ParentCommandLine, ParentUser, Image, ProcessGuid, CommandLine, Description, OriginalFileName, CurrentDirectory, Hashes
| extend HostName = iif(Computer has '.',substring(Computer,0,indexof(Computer,'.')),Computer) , DnsDomain = iif(Computer has '.',substring(Computer,indexof(Computer,'.')+1),'')
triggerOperator: gt
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2024-01-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/cbf6ad48-fa5c-4bf7-b205-28dbadb91255')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/cbf6ad48-fa5c-4bf7-b205-28dbadb91255')]",
"properties": {
"alertRuleTemplateName": "cbf6ad48-fa5c-4bf7-b205-28dbadb91255",
"customDetails": null,
"description": "'This query detects the execution of renamed Windows binaries (Lolbins). This is a common technique used by adversaries to evade detection. \nRef: https://docs.paloaltonetworks.com/cortex/cortex-xdr/cortex-xdr-analytics-alert-reference/cortex-xdr-analytics-alert-reference/execution-of-renamed-lolbin.html'\n",
"displayName": "Windows Binaries Lolbins Renamed",
"enabled": true,
"entityMappings": [
{
"entityType": "Process",
"fieldMappings": [
{
"columnName": "CommandLine",
"identifier": "CommandLine"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "Computer",
"identifier": "FullName"
},
{
"columnName": "HostName",
"identifier": "HostName"
},
{
"columnName": "DnsDomain",
"identifier": "DnsDomain"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "User",
"identifier": "Name"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Endpoint Threat Protection Essentials/Analytic Rules/WindowsBinariesLolbinsRenamed.yaml",
"query": "let procList = externaldata(Process:string) [@\"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Microsoft_Lolbas_Execution_Binaries.csv\"] with (format=\"csv\", ignoreFirstRecord=True);\nEvent\n| where EventLog =~ \"Microsoft-Windows-Sysmon/Operational\" and EventID==1\n| parse EventData with * 'Image\">' Image \"<\" * 'OriginalFileName\">' OriginalFileName \"<\" *\n| where OriginalFileName has_any (procList) and not (Image has_any (procList))\n| parse EventData with * 'ProcessGuid\">' ProcessGuid \"<\" * 'Description\">' Description \"<\" * 'CommandLine\">' CommandLine \"<\" * 'CurrentDirectory\">' CurrentDirectory \"<\" * 'User\">' User \"<\" * 'LogonGuid\">' LogonGuid \"<\" * 'Hashes\">' Hashes \"<\" * 'ParentProcessGuid\">' ParentProcessGuid \"<\" * 'ParentImage\">' ParentImage \"<\" * 'ParentCommandLine\">' ParentCommandLine \"<\" * 'ParentUser\">' ParentUser \"<\" *\n| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by EventID, Computer, User, ParentImage, ParentProcessGuid, ParentCommandLine, ParentUser, Image, ProcessGuid, CommandLine, Description, OriginalFileName, CurrentDirectory, Hashes\n| extend HostName = iif(Computer has '.',substring(Computer,0,indexof(Computer,'.')),Computer) , DnsDomain = iif(Computer has '.',substring(Computer,indexof(Computer,'.')+1),'')\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Execution"
],
"techniques": [
"T1059"
],
"templateVersion": "1.0.3",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}