Query: Sigma rule for Detects alternate PowerShell hosts potentially bypassing detections looking for powershell.exe
Matching passage: Sigma rule: Detects alternate PowerShell hosts potentially bypassing detections looking for powershell.exe. Logsource: windows / pipe_created. Rule: title: Alternate PowerShell Hosts Pipe id: 58cb02d5-78ce-4692-b3e1-dce850aae41a related: - id: ac7102b4-9e1e-4802-9b4f-17c5524c015c type: derived status: test description: Detects alternate PowerShell hosts potentially bypassing detections looking for powershell.exe references: - https://threathunterplaybook.com/hunts/windows/190610-PwshAlternateHosts/notebook.html - https://threathunterplaybook.com/hunts/windows/190410-LocalPwshExecution/notebook.html author: Roberto Rodriguez @Cyb3rWard0g, Tim Shelton date: 2019-09-12 modified: 2025-10-07 tags: - attack.execution - attack.t1059.001 logsource: product: windows category: pipe_created definition: Note that you have to configure logging for Named Pipe Events in Sysmon config (Event ID 17 and Event ID 18). The basic configuration is in popular sysmon configuration (https://github.com/SwiftOnSecurity/sysmon-config), but it is worth verifying. You can also use other repo, e.g. https://github.com/Neo23x0/sysmon-config, https://github.com/olafhartong/sysmon-modular. How to test detection? You can check powershell script from this site https://svch0st.medium.com/guide-to-named-pipes-and-hunting-for-cobalt-strike-pipes-dc46b2c5f575 detection: selection: PipeName|startswith: \PSHost filter_main_generic: - Image|contains: - :\Program Files\PowerShell\7-preview\pwsh.exe - :\Program Files\PowerShell\7\pwsh.exe - :\Windows\system32\dsac.exe - :\Windows\system32\inetsrv\w3wp.exe - :\Windows\System32\sdiagnhost.exe - :\Windows\system32\ServerManager.exe - :\Windows\system32\wbem\wmiprvse.exe - :\Windows\System32\WindowsPowerShell\v1.0\powershell_ise.exe - :\Windows\System32\WindowsPowerShell\v1.0\powershell.exe - :\Windows\System32\wsmprovhost.exe - :\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell_ise.exe - :\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe - Image|contains|all: - C:\Program Files\WindowsApps\Microsoft.PowerShellPreview - \pwsh.exe - Image|contains|all: - \AppData\Local\Microsoft\WindowsApps\Microsoft.PowerShellPreview - \pwsh.exe filter_optional_sqlserver: Image|startswith: - C:\Program Files (x86)\ - C:\Program Files\ Image|contains: \Microsoft SQL Server\ Image|endswith: \Tools\Binn\SQLPS.exe filter_optional_azure_connected_machine_agent: Image|startswith: C:\Program Files\AzureConnectedMachineAgent\GCArcService Image|endswith: \GC\gc_worker.exe filter_optional_citrix: Image|startswith: C:\Program Files\Citrix\ filter_optional_exchange: Image|startswith: C:\Program Files\Microsoft\Exchange Se
Near-miss passage: Sigma rule: Detects when secret scanning rule is deleted for the project or repository.. Logsource: bitbucket / audit. Rule: title: Bitbucket Secret Scanning Rule Deleted id: ff91e3f0-ad15-459f-9a85-1556390c138d status: test description: Detects when secret scanning rule is deleted for the project or repository. references: - https://confluence.atlassian.com/bitbucketserver/audit-log-events-776640423.html - https://confluence.atlassian.com/bitbucketserver/secret-scanning-1157471613.html author: Muhammad Faisal (@faisalusuf) date: 2024-02-25 tags: - attack.defense-impairment - attack.t1685 logsource: product: bitbucket service: audit definition: 'Requirements: "Basic" log level is required to receive these audit events.' detection: selection: auditType.category: - Projects - Repositories auditType.action: - Project secret scanning rule deleted - Repository secret scanning rule deleted condition: selection falsepositives: - Legitimate user activity. level: low