Query: rule covering Detects abusing Azure Browser SSO by requesting OAuth 2.0 refresh tokens for an Azure-AD-authenticated Windows user (i.e
Matching passage: Sigma rule: Detects abusing Azure Browser SSO by requesting OAuth 2.0 refresh tokens for an Azure-AD-authenticated Windows user (i.e. Logsource: windows / image_load. Rule: title: Potential Azure Browser SSO Abuse id: 50f852e6-af22-4c78-9ede-42ef36aa3453 status: test description: 'Detects abusing Azure Browser SSO by requesting OAuth 2.0 refresh tokens for an Azure-AD-authenticated Windows user (i.e. the machine is joined to Azure AD and a user logs in with their Azure AD account) wanting to perform SSO authentication in the browser. An attacker can use this to authenticate to Azure AD in a browser as that user. ' references: - https://posts.specterops.io/requesting-azure-ad-request-tokens-on-azure-ad-joined-machines-for-browser-sso-2b0409caad30 author: Den Iuzvyk date: 2020-07-15 modified: 2023-04-18 tags: - attack.persistence - attack.privilege-escalation - attack.execution - attack.stealth - attack.t1574.001 logsource: category: image_load product: windows detection: selection: ImageLoaded: C:\Windows\System32\MicrosoftAccountTokenProvider.dll filter_main_bgtaskhost: Image|startswith: - C:\Windows\System32\ - C:\Windows\SysWOW64\ Image|endswith: \BackgroundTaskHost.exe filter_optional_devenv: Image|startswith: - C:\Program Files\Microsoft Visual Studio\ - C:\Program Files (x86)\Microsoft Visual Studio\ Image|endswith: \IDE\devenv.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_onedrive: Image|endswith: \AppData\Local\Microsoft\OneDrive\OneDrive.exe filter_optional_null: Image: null condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - False positives are expected since this rules is only looking for the DLL load event. This rule is better used in correlation with related activity level: low
Near-miss passage: Sigma rule: A General detection for WebDav user-agent being used to PUT files on a WebDav network share. This could be an indicator. Logsource: zeek / http. Rule: title: WebDav Put Request id: 705072a5-bb6f-4ced-95b6-ecfa6602090b status: test description: A General detection for WebDav user-agent being used to PUT files on a WebDav network share. This could be an indicator of exfiltration. references: - https://github.com/OTRF/detection-hackathon-apt29/issues/17 author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research) date: 2020-05-02 modified: 2024-03-13 tags: - attack.exfiltration - attack.t1048.003 logsource: product: zeek service: http detection: selection: user_agent|contains: WebDAV method: PUT filter: id.resp_h|cidr: - 10.0.0.0/8 - 127.0.0.0/8 - 172.16.0.0/12 - 192.168.0.0/16 - 169.254.0.0/16 condition: selection and not filter falsepositives: - Unknown level: low