Tanaka Zakku
50 lines
1.5 KiB
YAML
50 lines
1.5 KiB
YAML
title: Cabinet File Expansion
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author: Bhabesh Raj
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date: 2021/07/30
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description: Adversaries can use the inbuilt expand utility to decompress cab files
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as seen in recent Iranian MeteorExpress attack
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_2:
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Image: '*\expand.exe'
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SELECTION_3:
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CommandLine: '*.cab*'
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SELECTION_4:
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CommandLine: '*/F:*'
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SELECTION_5:
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CommandLine: '*-F:*'
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SELECTION_6:
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CommandLine: '*C:\ProgramData\\*'
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SELECTION_7:
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CommandLine: '*C:\Public\\*'
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SELECTION_8:
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CommandLine: '*\AppData\Local\Temp\\*'
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SELECTION_9:
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CommandLine: '*\AppData\Roaming\Temp\\*'
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condition: (SELECTION_1 and (SELECTION_2) and (SELECTION_3 or SELECTION_4 or SELECTION_5
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or SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9))
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falsepositives:
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- System administrator Usage
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fields:
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- ComputerName
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- User
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- CommandLine
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- ParentCommandLine
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id: 9f107a84-532c-41af-b005-8d12a607639f
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level: medium
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logsource:
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category: process_creation
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product: windows
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modified: 2021/08/31
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references:
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- https://labs.sentinelone.com/meteorexpress-mysterious-wiper-paralyzes-iranian-trains-with-epic-troll
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- https://blog.malwarebytes.com/threat-intelligence/2021/08/new-variant-of-konni-malware-used-in-campaign-targetting-russia/
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status: experimental
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tags:
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- attack.execution
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- attack.t1218
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yml_filename: sysmon_expand_cabinet_files.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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