Query: Sigma rule for Detects modifications to Default Domain or Default Domain Controllers Group Policy Objects (GPOs). Adversaries may modif
Matching passage: Sigma rule: Detects modifications to Default Domain or Default Domain Controllers Group Policy Objects (GPOs). Adversaries may modif. Logsource: windows / security. Rule: title: Windows Default Domain GPO Modification id: e5ac86dd-2da1-454b-be74-05d26c769d7d related: - id: dcff7e85-d01f-4eb5-badd-84e2e6be8294 type: similar status: experimental description: 'Detects modifications to Default Domain or Default Domain Controllers Group Policy Objects (GPOs). Adversaries may modify these default GPOs to deploy malicious configurations across the domain. ' references: - https://www.trendmicro.com/en_us/research/25/i/unmasking-the-gentlemen-ransomware.html - https://adsecurity.org/?p=3377 - https://www.pentestpartners.com/security-blog/living-off-the-land-gpo-style/ - https://jgspiers.com/audit-group-policy-changes/ author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-11-22 tags: - attack.privilege-escalation - attack.defense-impairment - attack.t1484.001 logsource: product: windows service: security definition: 'Enable ''Audit Directory Service Changes'' in the Default Domain Controllers Policy under: Computer Configuration -> Policies -> Windows Settings -> Security Settings -> Advanced Audit Policy Configuration -> Audit Policies -> DS Access -> Audit Directory Service Changes (Success). Additionally, proper SACL needs to be configured on the ''CN=Policies,CN=System,DC=<domain>,DC=<tld>'' container in Active Directory to capture changes to Group Policy Objects. ' detection: selection: EventID: 5136 ObjectClass: groupPolicyContainer ObjectDN|startswith: - CN={31B2F340-016D-11D2-945F-00C04FB984F9},CN=POLICIES,CN=SYSTEM - CN={6AC1786C-016F-11D2-945F-00C04FB984F9},CN=POLICIES,CN=SYSTEM condition: selection falsepositives: - Legitimate modifications to Default Domain or Default Domain Controllers GPOs level: medium
Near-miss passage: Sigma rule: Detects service installation of different remote access tools software. These software are often abused by threat actors. Logsource: windows / system. Rule: title: Remote Access Tool Services Have Been Installed - System id: 1a31b18a-f00c-4061-9900-f735b96c99fc related: - id: c8b00925-926c-47e3-beea-298fd563728e type: similar status: test description: Detects service installation of different remote access tools software. These software are often abused by threat actors to perform references: - https://redcanary.com/blog/misbehaving-rats/ author: Connor Martin, Nasreddine Bencherchali date: 2022-12-23 modified: 2023-06-22 tags: - attack.privilege-escalation - attack.persistence - attack.execution - attack.t1543.003 - attack.t1569.002 logsource: product: windows service: system detection: selection: Provider_Name: Service Control Manager EventID: - 7045 - 7036 ServiceName|contains: - AmmyyAdmin - Atera - BASupportExpressSrvcUpdater - BASupportExpressStandaloneService - chromoting - GoToAssist - GoToMyPC - jumpcloud - LMIGuardianSvc - LogMeIn - monblanking - Parsec - RManService - RPCPerformanceService - RPCService - SplashtopRemoteService - SSUService - TeamViewer - TightVNC - vncserver - Zoho condition: selection falsepositives: - Unknown level: medium