Nasreddine Bencherchali
598d29f811
chore: change tags, date, modified fields to comply with v2 of the Sigma spec. chore: update the related type from `obsoletes` to `obsolete`. chore: update local json schema to the latest version.
29 lines
1.2 KiB
YAML
29 lines
1.2 KiB
YAML
title: Powershell Exfiltration Over SMTP
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id: 9a7afa56-4762-43eb-807d-c3dc9ffe211b
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status: test
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description: |
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Adversaries may steal data by exfiltrating it over an un-encrypted network protocol other than that of the existing command and control channel.
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The data may also be sent to an alternate network location from the main command and control server.
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1048.003/T1048.003.md#atomic-test-5---exfiltration-over-alternative-protocol---smtp
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- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/send-mailmessage?view=powershell-7.4
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- https://www.ietf.org/rfc/rfc2821.txt
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author: frack113
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date: 2022-09-26
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tags:
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- attack.exfiltration
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- attack.t1048.003
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logsource:
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product: windows
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category: ps_script
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definition: 'Requirements: Script Block Logging must be enabled'
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detection:
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selection:
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ScriptBlockText|contains: 'Send-MailMessage'
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filter:
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ScriptBlockText|contains: 'CmdletsToExport'
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condition: selection and not filter
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falsepositives:
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- Legitimate script
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level: medium
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