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32 lines
1.1 KiB
YAML
32 lines
1.1 KiB
YAML
title: Avusing Azure Browser SSO
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id: 50f852e6-af22-4c78-9ede-42ef36aa3453
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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.
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author: Den Iuzvyk
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reference:
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- https://posts.specterops.io/requesting-azure-ad-request-tokens-on-azure-ad-joined-machines-for-browser-sso-2b0409caad30
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date: 2020/07/15
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modified: 2020/08/26
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logsource:
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category: sysmon
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product: windows
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.privilege_escalation
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- attack.t1073 # an old one
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- attack.t1574.002
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detection:
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condition: selection_dll and not filter_legit
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selection_dll:
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EventID: 7
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ImageLoaded|endswith: MicrosoftAccountTokenProvider.dll
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filter_legit:
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Image|endswith:
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- BackgroundTaskHost.exe
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- devenv.exe
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- iexplore.exe
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- MicrosoftEdge.exe
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falsepositives:
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- unknown
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level: high
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