Query: Sigma YAML for windows / process_creation
Matching passage: Sigma rule: Detects suspicious child processes of electron apps (teams, discord, slack, etc.). This could be a potential sign of ".a. Logsource: windows / process_creation. Rule: title: Suspicious Electron Application Child Processes id: f26eb764-fd89-464b-85e2-dc4a8e6e77b8 related: - id: 378a05d8-963c-46c9-bcce-13c7657eac99 type: similar status: test description: 'Detects suspicious child processes of electron apps (teams, discord, slack, etc.). This could be a potential sign of ".asar" file tampering (See reference section for more information) or binary execution proxy through specific CLI arguments (see related rule) ' references: - https://taggart-tech.com/quasar-electron/ - https://github.com/mttaggart/quasar - https://positive.security/blog/ms-officecmd-rce - https://lolbas-project.github.io/lolbas/Binaries/Msedge/ - https://lolbas-project.github.io/lolbas/Binaries/Teams/ - https://lolbas-project.github.io/lolbas/Binaries/msedgewebview2/ - https://medium.com/@MalFuzzer/one-electron-to-rule-them-all-dc2e9b263daf author: Nasreddine Bencherchali (Nextron Systems) date: 2022-10-21 modified: 2024-07-12 tags: - attack.execution logsource: category: process_creation product: windows detection: selection_parent: ParentImage|endswith: - \chrome.exe - \discord.exe - \GitHubDesktop.exe - \keybase.exe - \msedge.exe - \msedgewebview2.exe - \msteams.exe - \slack.exe - \teams.exe selection_child_image: Image|endswith: - \cmd.exe - \cscript.exe - \mshta.exe - \powershell.exe - \pwsh.exe - \regsvr32.exe - \whoami.exe - \wscript.exe selection_child_paths: Image|contains: - :\ProgramData\ - :\Temp\ - \AppData\Local\Temp\ - \Users\Public\ - \Windows\Temp\ filter_optional_discord: ParentImage|endswith: \Discord.exe Image|endswith: \cmd.exe CommandLine|contains: \NVSMI\nvidia-smi.exe condition: selection_parent and 1 of selection_child_* and not 1 of filter_optional_* falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects a Windows Filtering Platform (WFP) blocked connection event involving common Endpoint Detection and Response (ED. Logsource: windows / security. Rule: title: Windows Filtering Platform Blocked Connection From EDR Agent Binary id: bacf58c6-e199-4040-a94f-95dea0f1e45a status: test description: 'Detects a Windows Filtering Platform (WFP) blocked connection event involving common Endpoint Detection and Response (EDR) agents. Adversaries may use WFP filters to prevent Endpoint Detection and Response (EDR) agents from reporting security events. ' references: - https://github.com/netero1010/EDRSilencer - https://github.com/amjcyber/EDRNoiseMaker - https://ghoulsec.medium.com/misc-series-4-forensics-on-edrsilencer-events-428b20b3f983 author: '@gott_cyber' date: 2024-01-08 tags: - attack.defense-impairment - attack.t1685 logsource: product: windows service: security definition: 'Requirements: Audit Filtering Platform Connection needs to be enabled' detection: selection: EventID: 5157 Application|endswith: - \AmSvc.exe - \cb.exe - \CETASvc.exe - \CNTAoSMgr.exe - \CrAmTray.exe - \CrsSvc.exe - \CSFalconContainer.exe - \CSFalconService.exe - \CybereasonAV.exe - \CylanceSvc.exe - \cyserver.exe - \CyveraService.exe - \CyvrFsFlt.exe - \EIConnector.exe - \elastic-agent.exe - \elastic-endpoint.exe - \EndpointBasecamp.exe - \ExecutionPreventionSvc.exe - \filebeat.exe - \fortiedr.exe - \hmpalert.exe - \hurukai.exe - \LogProcessorService.exe - \mcsagent.exe - \mcsclient.exe - \MsMpEng.exe - \MsSense.exe - \Ntrtscan.exe - \PccNTMon.exe - \QualysAgent.exe - \RepMgr.exe - \RepUtils.exe - \RepUx.exe - \RepWAV.exe - \RepWSC.exe - \sedservice.exe - \SenseCncProxy.exe - \SenseIR.exe - \SenseNdr.exe - \SenseSampleUploader.exe - \SentinelAgent.exe - \SentinelAgentWorker.exe - \SentinelBrowserNativeHost.exe - \SentinelHelperService.exe - \SentinelServiceHost.exe - \SentinelStaticEngine.exe - \SentinelStaticEngineScanner.exe - \sfc.exe - \sophos ui.exe - \sophosfilescanner.exe - \sophosfs.exe - \sophoshealth.exe - \sophosips.exe - \sophosLivequeryservice.exe - \sophosnetfilter.exe - \sophosntpservice.exe - \sophososquery.exe - \sspservice.exe - \TaniumClient.exe - \TaniumCX.exe - \TaniumDetectEngine.exe - \TMBMSRV.exe - \TmCCSF.exe - \TmListen.exe - \TmWSCSvc.exe - \Traps.exe - \winlogbeat.exe - \WSCommunicator.exe - \xagt.exe condition: selection falsepositives: - Unlikely level: high