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Find sigma rule

Attack: Group Policy Discovery

Adversaries may gather information on Group Policy settings to identify paths for privilege escalation, security measures applied within a domain, and to discover patterns in domain objects that can be manipulated or used to blend in the environment. Group Policy allows for centralized management of user and computer settings in Active Directory (AD). Group policy objects (GPOs) are containers for group policy settings made up of files stored within a predictable network path \<DOMAIN>\SYSVOL\<DOMAIN>\Policies\.(Citation: TechNet Group Policy Basics)(Citation: ADSecurity GPO Persistence 2016)

Adversaries may use commands such as gpresult or various publicly available PowerShell functions, such as Get-DomainGPO and Get-DomainGPOLocalGroup, to gather information on Group Policy settings.(Citation: Microsoft gpresult)(Citation: Github PowerShell Empire) Adversaries may use this information to shape follow-on behaviors, including determining potential attack paths within the target network as well as opportunities to manipulate Group Policy settings (i.e. Domain or Tenant Policy Modification) for their benefit.

MITRE

Tactic

• discovery

technique

• T1615

Test : Get-DomainGPO to display group policy information via PowerView

OS

• windows

Description:

Use PowerView to Get-DomainGPO This will only work on Windows 10 Enterprise and A DC Windows 2019.

Executor

powershell

Sigma Rule

• proc_creation_win_powershell_non_interactive_execution.yml (id: f4bbd493-b796-416e-bbf2-121235348529)

• proc_creation_win_powershell_download_iex.yml (id: 85b0b087-eddf-4a2b-b033-d771fa2b9775)

• proc_creation_win_powershell_download_cradles.yml (id: 6e897651-f157-4d8f-aaeb-df8151488385)

• proc_creation_win_powershell_set_policies_to_unsecure_level.yml (id: 87e3c4e8-a6a8-4ad9-bb4f-46e7ff99a180)

• proc_creation_win_susp_progname.yml (id: efdd8dd5-cee8-4e59-9390-7d4d5e4dd6f6)

• proc_creation_win_powershell_susp_download_patterns.yml (id: e6c54d94-498c-4562-a37c-b469d8e9a275)

• proc_creation_win_powershell_download_patterns.yml (id: 3b6ab547-8ec2-4991-b9d2-2b06702a48d7)

• proc_creation_win_susp_web_request_cmd_and_cmdlets.yml (id: 9fc51a3c-81b3-4fa7-b35f-7c02cf10fd2d)

• proc_creation_win_powershell_susp_parameter_variation.yml (id: 36210e0d-5b19-485d-a087-c096088885f0)

• posh_pm_susp_invocation_specific.yml (id: 8ff28fdd-e2fa-4dfa-aeda-ef3d61c62090)

• posh_ps_susp_invocation_specific.yml (id: ae7fbf8e-f3cb-49fd-8db4-5f3bed522c71)

• posh_ps_web_request_cmd_and_cmdlets.yml (id: 1139d2e2-84b1-4226-b445-354492eba8ba)

• posh_ps_malicious_commandlets.yml (id: 89819aa4-bbd6-46bc-88ec-c7f7fe30efa6)

• posh_ps_powerview_malicious_commandlets.yml (id: dcd74b95-3f36-4ed9-9598-0490951643aa)

• net_connection_win_powershell_network_connection.yml (id: 1f21ec3f-810d-4b0e-8045-322202e22b4b)

• net_connection_win_susp_file_sharing_domains_susp_folders.yml (id: e0f8ab85-0ac9-423b-a73a-81b3c7b1aa97)

• posh_pm_bad_opsec_artifacts.yml (id: 8d31a8ce-46b5-4dd6-bdc3-680931f1db86)

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