Query: detect Detect suspicious parent processes of well-known Windows processes in logs
Matching passage: Sigma rule: Detect suspicious parent processes of well-known Windows processes. Logsource: windows / process_creation. Rule: title: Windows Processes Suspicious Parent Directory id: 96036718-71cc-4027-a538-d1587e0006a7 status: test description: Detect suspicious parent processes of well-known Windows processes references: - https://web.archive.org/web/20180718061628/https://securitybytes.io/blue-team-fundamentals-part-two-windows-processes-759fe15965e2 - https://www.carbonblack.com/2014/06/10/screenshot-demo-hunt-evil-faster-than-ever-with-carbon-black/ - https://www.13cubed.com/downloads/windows_process_genealogy_v2.pdf author: vburov date: 2019-02-23 modified: 2025-03-06 tags: - attack.stealth - attack.t1036.003 - attack.t1036.005 logsource: category: process_creation product: windows detection: selection: Image|endswith: - \svchost.exe - \taskhost.exe - \lsm.exe - \lsass.exe - \services.exe - \lsaiso.exe - \csrss.exe - \wininit.exe - \winlogon.exe filter_sys: - ParentImage|endswith: - \SavService.exe - \ngen.exe - ParentImage|contains: - \System32\ - \SysWOW64\ filter_msmpeng: ParentImage|contains: - \Windows Defender\ - \Microsoft Security Client\ ParentImage|endswith: \MsMpEng.exe filter_null: - ParentImage: null - ParentImage: - '' - '-' condition: selection and not 1 of filter_* falsepositives: - Some security products seem to spawn these level: low
Near-miss passage: Sigma rule: Detects the creation of a dMSASvc account using the New-ADServiceAccount cmdlet in certain OUs. The fact that the Cmdlet. Logsource: windows / process_creation. Rule: title: New DMSA Service Account Created in Specific OUs id: 0ea8db81-2ff6-4525-9448-33bbe7effc13 related: - id: e15bc294-ae2a-45ad-b7d6-637b33868bde type: similar - id: 02122374-b74e-495c-b285-9e4da973f3d6 type: similar status: experimental description: 'Detects the creation of a dMSASvc account using the New-ADServiceAccount cmdlet in certain OUs. The fact that the Cmdlet is used to create a dMSASvc account in a specific OU is highly suspicious. It is a pattern trying to exploit the BadSuccessor privilege escalation vulnerability in Windows Server 2025. On top of that, if the user that is creating the dMSASvc account is not a legitimate administrator or does not have the necessary permissions, it is a strong signal of an attempted or successful abuse of the BaDSuccessor vulnerability for privilege escalation within the Windows Server 2025 Active Directory environment. ' references: - https://www.akamai.com/blog/security-research/abusing-bad-successor-for-privilege-escalation-in-active-directory author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-05-24 tags: - attack.privilege-escalation - attack.initial-access - attack.persistence - attack.stealth - attack.t1078.002 - attack.t1098 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \powershell.exe - \pwsh.exe - \powershell_ise.exe - OriginalFileName: - powershell.exe - pwsh.dll - powershell_ise.exe selection_cli: CommandLine|contains|all: - New-ADServiceAccount - -CreateDelegatedServiceAccount - -path condition: all of selection_* falsepositives: - Unknown level: medium