Nasreddine Bencherchali
38 lines
1.2 KiB
YAML
38 lines
1.2 KiB
YAML
title: Bitsadmin to Uncommon TLD
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id: 9eb68894-7476-4cd6-8752-23b51f5883a7
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status: experimental
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description: Detects Bitsadmin connections to domains with uncommon TLDs
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references:
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- https://twitter.com/jhencinski/status/1102695118455349248
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- https://isc.sans.edu/forums/diary/Investigating+Microsoft+BITS+Activity/23281/
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author: Florian Roth, Tim Shelton
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date: 2019/03/07
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modified: 2022/08/16
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tags:
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- attack.command_and_control
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- attack.t1071.001
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- attack.defense_evasion
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- attack.persistence
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- attack.t1197
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- attack.s0190
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logsource:
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category: proxy
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detection:
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selection:
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c-useragent|startswith: 'Microsoft BITS/'
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falsepositives:
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r-dns|endswith:
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- '.com'
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- '.net'
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- '.org'
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- '.scdn.co' # spotify streaming
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- '.sfx.ms' # Microsoft domain, example request: https://oneclient.sfx.ms/PreSignInSettings/Prod/2022-08-15-21-xx-xx/PreSignInSettingsConfig.json
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condition: selection and not falsepositives
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fields:
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- ClientIP
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- c-uri
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- c-useragent
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falsepositives:
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- Rare programs that use Bitsadmin and update from regional TLDs e.g. .uk or .ca
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level: high
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