Query: alert when Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activit
Matching passage: Sigma rule: Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activit. Logsource: aws / cloudtrail. Rule: title: AWS KMS Imported Key Material Usage id: 1279262f-1464-422f-ac0d-5b545320c526 status: experimental description: 'Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activity is uncommon and provides a high certainty signal. ' references: - https://www.chrisfarris.com/post/effective-aws-ransomware/ - https://docs.aws.amazon.com/kms/latest/developerguide/ct-importkeymaterial.html - https://docs.aws.amazon.com/kms/latest/developerguide/ct-deleteimportedkeymaterial.html author: toopricey date: 2025-10-18 tags: - attack.impact - attack.t1486 - attack.resource-development - attack.t1608.003 logsource: product: aws service: cloudtrail detection: selection: eventSource: kms.amazonaws.com eventName: - ImportKeyMaterial - DeleteImportedKeyMaterial condition: selection falsepositives: - Legitimate use cases for imported key material are rare, but may include, Organizations with hybrid cloud architectures that import external key material for compliance requirements. - Development or testing environments that simulate external key management scenarios. Even in these cases, such activity is typically infrequent and should not add significant noise. level: high
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