Florian Roth
33 lines
912 B
YAML
33 lines
912 B
YAML
title: 'Binary Padding'
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id: 95361ce5-c891-4b0a-87ca-e24607884a96
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status: test
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description: 'Adversaries may use binary padding to add junk data and change the on-disk representation of malware. This rule detect using dd and truncate to add a junk data to file.'
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author: 'Igor Fits, Mikhail Larin, oscd.community'
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references:
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1027.001/T1027.001.md
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date: 2020/10/19
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modified: 2021/11/27
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logsource:
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product: macos
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category: process_creation
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detection:
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selection1:
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Image|endswith:
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- '/truncate'
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CommandLine|contains:
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- '-s'
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selection2:
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Image|endswith:
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- '/dd'
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CommandLine|contains:
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- 'if='
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filter:
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CommandLine|contains: 'of='
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condition: selection1 or (selection2 and not filter)
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falsepositives:
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- Legitimate script work
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level: high
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tags:
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- attack.defense_evasion
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- attack.t1027.001
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