Query: write Sigma for Identifies when a virtual network device is being modified or deleted. This can be a network interface, network virtual
Matching passage: Sigma rule: Identifies when a virtual network device is being modified or deleted. This can be a network interface, network virtual. Logsource: azure / activitylogs. Rule: title: Azure Virtual Network Device Modified or Deleted id: 15ef3fac-f0f0-4dc4-ada0-660aa72980b3 status: test description: 'Identifies when a virtual network device is being modified or deleted. This can be a network interface, network virtual appliance, virtual hub, or virtual router. ' references: - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations author: Austin Songer @austinsonger date: 2021-08-08 modified: 2022-08-23 tags: - attack.impact logsource: product: azure service: activitylogs detection: selection: operationName: - MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/WRITE - MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/DELETE - MICROSOFT.NETWORK/NETWORKINTERFACES/WRITE - MICROSOFT.NETWORK/NETWORKINTERFACES/JOIN/ACTION - MICROSOFT.NETWORK/NETWORKINTERFACES/DELETE - MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/DELETE - MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/WRITE - MICROSOFT.NETWORK/VIRTUALHUBS/DELETE - MICROSOFT.NETWORK/VIRTUALHUBS/WRITE - MICROSOFT.NETWORK/VIRTUALROUTERS/WRITE - MICROSOFT.NETWORK/VIRTUALROUTERS/DELETE condition: selection falsepositives: - Virtual Network Device being modified or 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. - Virtual Network Device modified or 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 the execution of System Informer, a task manager tool to view and manipulate processes, kernel options and other. Logsource: windows / process_creation. Rule: title: PUA - System Informer Execution id: 5722dff1-4bdd-4949-86ab-fbaf707e767a related: - id: 811e0002-b13b-4a15-9d00-a613fce66e42 type: similar status: test description: Detects the execution of System Informer, a task manager tool to view and manipulate processes, kernel options and other low level operations references: - https://github.com/winsiderss/systeminformer author: Florian Roth (Nextron Systems) date: 2023-05-08 modified: 2024-11-23 tags: - attack.persistence - attack.privilege-escalation - attack.discovery - attack.stealth - attack.t1082 - attack.t1564 - attack.t1543 logsource: category: process_creation product: windows detection: selection: - Image|endswith: \SystemInformer.exe - OriginalFileName: SystemInformer.exe - Description: System Informer - Product: System Informer - Hashes|contains: - MD5=19426363A37C03C3ED6FEDF57B6696EC - SHA1=8B12C6DA8FAC0D5E8AB999C31E5EA04AF32D53DC - SHA256=8EE9D84DE50803545937A63C686822388A3338497CDDB660D5D69CF68B68F287 - IMPHASH=B68908ADAEB5D662F87F2528AF318F12 condition: selection falsepositives: - System Informer is regularly used legitimately by system administrators or developers. Apply additional filters accordingly level: medium