Query: detection rule: Identifies when a suppression rule is created in Azure. Adversary's could attempt this to evade detection.
Matching passage: Sigma rule: Identifies when a suppression rule is created in Azure. Adversary's could attempt this to evade detection.. Logsource: azure / activitylogs. Rule: title: Azure Suppression Rule Created id: 92cc3e5d-eb57-419d-8c16-5c63f325a401 status: test description: Identifies when a suppression rule is created in Azure. Adversary's could attempt this to evade detection. references: - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations author: Austin Songer date: 2021-08-16 modified: 2022-08-23 tags: - attack.impact logsource: product: azure service: activitylogs detection: selection: operationName: MICROSOFT.SECURITY/ALERTSSUPPRESSIONRULES/WRITE condition: selection falsepositives: - Suppression Rule being created may be performed by a system administrator. - Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. - Suppression Rule created 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 usage of bitsadmin downloading a file to a suspicious target folder. Logsource: windows / process_creation. Rule: title: File Download Via Bitsadmin To A Suspicious Target Folder id: 2ddef153-167b-4e89-86b6-757a9e65dcac related: - id: 6e30c82f-a9f8-4aab-b79c-7c12bce6f248 type: obsolete - id: 1cf465a1-2609-4c15-9b66-c32dbe4bfd67 type: similar status: test description: Detects usage of bitsadmin downloading a file to a suspicious target folder references: - https://blog.netspi.com/15-ways-to-download-a-file/#bitsadmin - https://isc.sans.edu/diary/22264 - https://lolbas-project.github.io/lolbas/Binaries/Bitsadmin/ - https://blog.talosintelligence.com/breaking-the-silence-recent-truebot-activity/ author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems) date: 2022-06-28 modified: 2025-12-10 tags: - attack.persistence - attack.execution - attack.stealth - attack.t1197 - attack.s0190 - attack.t1036.003 - attack.command-and-control - attack.t1105 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \bitsadmin.exe - OriginalFileName: bitsadmin.exe selection_flags: CommandLine|contains: - ' /transfer ' - ' /create ' - ' /addfile ' selection_folder: CommandLine|contains: - :\Perflogs - :\ProgramData\ - :\Temp\ - :\Users\Public\ - :\Windows\ - \$Recycle.Bin\ - \AppData\Local\ - \AppData\Roaming\ - \Contacts\ - \Desktop\ - \Favorites\ - \Favourites\ - \inetpub\wwwroot\ - \Music\ - \Pictures\ - \Start Menu\Programs\Startup\ - \Users\Default\ - \Videos\ - '%ProgramData%' - '%public%' - '%temp%' - '%tmp%' condition: all of selection_* falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_bitsadmin_download_susp_targetfolder/info.yml simulation: - type: atomic-red-team name: Windows - BITSAdmin BITS Download technique: T1105 atomic_guid: a1921cd3-9a2d-47d5-a891-f1d0f2a7a31b