Query: detect Identifies when a virtual network device is being modified or deleted. This can be a network interface, network virtual in logs
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 a DNS query by a non browser process on the system to "azurewebsites.net". The latter was often used by threat a. Logsource: windows / dns_query. Rule: title: DNS Query To AzureWebsites.NET By Non-Browser Process id: e043f529-8514-4205-8ab0-7f7d2927b400 related: - id: 5c80b618-0dbb-46e6-acbb-03d90bcb6d83 type: derived status: test description: 'Detects a DNS query by a non browser process on the system to "azurewebsites.net". The latter was often used by threat actors as a malware hosting and exfiltration site. ' references: - https://www.sentinelone.com/labs/wip26-espionage-threat-actors-abuse-cloud-infrastructure-in-targeted-telco-attacks/ - https://symantec-enterprise-blogs.security.com/threat-intelligence/harvester-new-apt-attacks-asia - https://www.ptsecurity.com/ww-en/analytics/pt-esc-threat-intelligence/higaisa-or-winnti-apt-41-backdoors-old-and-new/ - https://intezer.com/blog/research/how-we-escaped-docker-in-azure-functions/ author: Nasreddine Bencherchali (Nextron Systems) date: 2024-06-24 tags: - attack.command-and-control - attack.t1219.002 logsource: product: windows category: dns_query detection: selection: QueryName|endswith: azurewebsites.net filter_optional_chrome: Image: - C:\Program Files\Google\Chrome\Application\chrome.exe - C:\Program Files (x86)\Google\Chrome\Application\chrome.exe filter_optional_firefox: Image: - C:\Program Files\Mozilla Firefox\firefox.exe - C:\Program Files (x86)\Mozilla Firefox\firefox.exe filter_optional_ie: Image: - C:\Program Files (x86)\Internet Explorer\iexplore.exe - C:\Program Files\Internet Explorer\iexplore.exe filter_optional_edge_1: - Image|startswith: C:\Program Files (x86)\Microsoft\EdgeWebView\Application\ - Image|endswith: \WindowsApps\MicrosoftEdge.exe - Image: - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe - C:\Program Files\Microsoft\Edge\Application\msedge.exe filter_optional_edge_2: Image|startswith: - C:\Program Files (x86)\Microsoft\EdgeCore\ - C:\Program Files\Microsoft\EdgeCore\ Image|endswith: - \msedge.exe - \msedgewebview2.exe filter_optional_safari: Image|endswith: \safari.exe filter_optional_defender: Image|endswith: - \MsMpEng.exe - \MsSense.exe filter_optional_brave: Image|endswith: \brave.exe Image|startswith: C:\Program Files\BraveSoftware\ filter_optional_maxthon: Image|contains: \AppData\Local\Maxthon\ Image|endswith: \maxthon.exe filter_optional_opera: Image|contains: \AppData\Local\Programs\Opera\ Image|endswith: \opera.exe filter_optional_seamonkey: Image|startswith: - C:\Program Files\SeaMonkey\ - C:\Program Files (x86)\SeaMonkey\ Image|endswith: \seamonkey.exe filter_optional_vivaldi: Image|contains: \AppD