Query: Sigma rule for Detects instances where an HTTP service on an OpenCanary node has had login attempt via Form POST.
Matching passage: Sigma rule: Detects instances where an HTTP service on an OpenCanary node has had login attempt via Form POST.. Logsource: opencanary / application. Rule: title: OpenCanary - HTTP POST Login Attempt id: af1ac430-df6b-4b38-b976-0b52f07a0252 status: test description: 'Detects instances where an HTTP service on an OpenCanary node has had login attempt via Form POST. ' references: - https://opencanary.readthedocs.io/en/latest/starting/configuration.html#services-configuration - https://github.com/thinkst/opencanary/blob/a0896adfcaf0328cfd5829fe10d2878c7445138e/opencanary/logger.py#L52 author: Security Onion Solutions date: 2024-03-08 tags: - attack.initial-access - attack.t1190 logsource: category: application product: opencanary detection: selection: logtype: 3001 condition: selection falsepositives: - Unlikely level: high
Near-miss 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