Query: Sigma YAML for azure / activitylogs
Matching passage: Sigma rule: Identifies when a Azure Kubernetes network policy is modified or deleted.. Logsource: azure / activitylogs. Rule: title: Azure Kubernetes Network Policy Change id: 08d6ac24-c927-4469-b3b7-2e422d6e3c43 status: test description: Identifies when a Azure Kubernetes network policy is modified or deleted. references: - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftkubernetes - https://www.microsoft.com/security/blog/2021/03/23/secure-containerized-environments-with-updated-threat-matrix-for-kubernetes/ - https://www.microsoft.com/security/blog/2020/04/02/attack-matrix-kubernetes/ - https://medium.com/mitre-engenuity/att-ck-for-containers-now-available-4c2359654bf1 author: Austin Songer @austinsonger date: 2021-08-07 modified: 2022-08-23 tags: - attack.impact - attack.credential-access - attack.t1485 - attack.t1496 - attack.t1489 logsource: product: azure service: activitylogs detection: selection: operationName: - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/NETWORKING.K8S.IO/NETWORKPOLICIES/WRITE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/NETWORKING.K8S.IO/NETWORKPOLICIES/DELETE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/EXTENSIONS/NETWORKPOLICIES/WRITE - MICROSOFT.KUBERNETES/CONNECTEDCLUSTERS/EXTENSIONS/NETWORKPOLICIES/DELETE condition: selection falsepositives: - Network Policy being modified and deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. - Network Policy being modified and deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule. level: medium
Near-miss passage: Sigma rule: Detects when an attacker modifies values of the Disk Cleanup Handler in the registry to achieve persistence. The disk cl. Logsource: windows / registry_add. Rule: title: Potential Persistence Via Disk Cleanup Handler - Registry id: d4f4e0be-cf12-439f-9e25-4e2cdcf7df5a status: test description: 'Detects when an attacker modifies values of the Disk Cleanup Handler in the registry to achieve persistence. The disk cleanup manager is part of the operating system. It displays the dialog box […] The user has the option of enabling or disabling individual handlers by selecting or clearing their check box in the disk cleanup manager''s UI. Although Windows comes with a number of disk cleanup handlers, they aren''t designed to handle files produced by other applications. Instead, the disk cleanup manager is designed to be flexible and extensible by enabling any developer to implement and register their own disk cleanup handler. Any developer can extend the available disk cleanup services by implementing and registering a disk cleanup handler. ' references: - https://persistence-info.github.io/Data/diskcleanuphandler.html - https://www.hexacorn.com/blog/2018/09/02/beyond-good-ol-run-key-part-86/ author: Nasreddine Bencherchali (Nextron Systems) date: 2022-07-21 modified: 2023-02-07 tags: - attack.persistence logsource: product: windows category: registry_add detection: selection: EventType: CreateKey TargetObject|contains: \SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\ filter_main_default_keys: TargetObject|endswith: - \Active Setup Temp Folders - \BranchCache - \Content Indexer Cleaner - \D3D Shader Cache - \Delivery Optimization Files - \Device Driver Packages - \Diagnostic Data Viewer database files - \Downloaded Program Files - \DownloadsFolder - \Feedback Hub Archive log files - \Internet Cache Files - \Language Pack - \Microsoft Office Temp Files - \Offline Pages Files - \Old ChkDsk Files - \Previous Installations - \Recycle Bin - \RetailDemo Offline Content - \Setup Log Files - \System error memory dump files - \System error minidump files - \Temporary Files - \Temporary Setup Files - \Temporary Sync Files - \Thumbnail Cache - \Update Cleanup - \Upgrade Discarded Files - \User file versions - \Windows Defender - \Windows Error Reporting Files - \Windows ESD installation files - \Windows Upgrade Log Files condition: selection and not 1 of filter_main_* falsepositives: - Legitimate new entry added by windows level: medium