Query: write Sigma for Identifies when a Firewall Policy is Modified or Deleted.
Matching passage: Sigma rule: Identifies when a Firewall Policy is Modified or Deleted.. Logsource: azure / activitylogs. Rule: title: Azure Network Firewall Policy Modified or Deleted id: 83c17918-746e-4bd9-920b-8e098bf88c23 status: test description: Identifies when a Firewall Policy is Modified or Deleted. references: - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations author: Austin Songer @austinsonger date: 2021-09-02 modified: 2022-08-23 tags: - attack.impact - attack.defense-impairment - attack.t1686.001 logsource: product: azure service: activitylogs detection: selection: operationName: - MICROSOFT.NETWORK/FIREWALLPOLICIES/WRITE - MICROSOFT.NETWORK/FIREWALLPOLICIES/JOIN/ACTION - MICROSOFT.NETWORK/FIREWALLPOLICIES/CERTIFICATES/ACTION - MICROSOFT.NETWORK/FIREWALLPOLICIES/DELETE condition: selection falsepositives: - Firewall Policy being modified or deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. - Firewall Policy modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule. level: medium
Near-miss passage: Sigma rule: Detects Commandlet names from well-known PowerShell exploitation frameworks. Logsource: windows / ps_script. Rule: title: Malicious PowerShell Commandlets - ScriptBlock id: 89819aa4-bbd6-46bc-88ec-c7f7fe30efa6 related: - id: 7d0d0329-0ef1-4e84-a9f5-49500f9d7c6c type: similar - id: 02030f2f-6199-49ec-b258-ea71b07e03dc type: similar - id: 6d3f1399-a81c-4409-aff3-1ecfe9330baf type: obsolete - id: 83083ac6-1816-4e76-97d7-59af9a9ae46e type: obsolete status: test description: Detects Commandlet names from well-known PowerShell exploitation frameworks references: - https://adsecurity.org/?p=2921 - https://github.com/S3cur3Th1sSh1t/PowerSharpPack/tree/master/PowerSharpBinaries - https://github.com/BC-SECURITY/Invoke-ZeroLogon/blob/111d17c7fec486d9bb23387e2e828b09a26075e4/Invoke-ZeroLogon.ps1 - https://github.com/xorrior/RandomPS-Scripts/blob/848c919bfce4e2d67b626cbcf4404341cfe3d3b6/Get-DXWebcamVideo.ps1 - https://github.com/rvrsh3ll/Misc-Powershell-Scripts/blob/6f23bb41f9675d7e2d32bacccff75e931ae00554/OfficeMemScraper.ps1 - https://github.com/dafthack/DomainPasswordSpray/blob/b13d64a5834694aa73fd2aea9911a83027c465a7/DomainPasswordSpray.ps1 - https://unit42.paloaltonetworks.com/threat-assessment-black-basta-ransomware/ - https://research.nccgroup.com/2022/06/06/shining-the-light-on-black-basta/ - https://github.com/calebstewart/CVE-2021-1675 - https://github.com/BloodHoundAD/BloodHound/blob/0927441f67161cc6dc08a53c63ceb8e333f55874/Collectors/AzureHound.ps1 - https://bloodhound.readthedocs.io/en/latest/data-collection/azurehound.html - https://github.com/HarmJ0y/DAMP - https://github.com/samratashok/nishang - https://github.com/DarkCoderSc/PowerRunAsSystem/ - https://github.com/besimorhino/powercat - https://github.com/Kevin-Robertson/Powermad - https://github.com/adrecon/ADRecon - https://github.com/adrecon/AzureADRecon - https://github.com/The-Viper-One/Invoke-PowerDPAPI/ - https://github.com/Arno0x/DNSExfiltrator/ author: Sean Metcalf, Florian Roth, Bartlomiej Czyz @bczyz1, oscd.community, Nasreddine Bencherchali, Tim Shelton, Mustafa Kaan Demir, Georg Lauenstein, Max Altgelt, Tobias Michalski, Austin Songer date: 2017-03-05 modified: 2025-12-10 tags: - attack.execution - attack.discovery - attack.t1482 - attack.t1087 - attack.t1087.001 - attack.t1087.002 - attack.t1069.001 - attack.t1069.002 - attack.t1069 - attack.t1059.001 logsource: product: windows category: ps_script definition: 'Requirements: Script Block Logging must be enabled' detection: selection: ScriptBlockText|contains: - Add-Exfiltration - Add-Persistence - Add-RegBackdoor - Add-RemoteRegBackdoor - Add-ScrnSave