Whoami Recon Writing Output to File

SIGMA detection rule by RedCanary, Sigma formatting by Micah Babinski · GPL-3.0

SocGholish employs several scripted reconnaissance commands. While much of this activity occurs in memory, one that stands out is the execution of whoami with the output redirected to a local temp file with the naming convention rad<5-hex-chars>.tmp. Part of the RedCanary 2024 Threat Detection Report.

title: Whoami Recon Writing Output to File
id: abcdf274-2fbd-4736-a16b-032fcac54eee
status: experimental
description: |
    SocGholish employs several scripted reconnaissance commands. While much of this activity 
    occurs in memory, one that stands out is the execution of whoami with the output redirected 
    to a local temp file with the naming convention rad<5-hex-chars>.tmp. Part of the RedCanary 
    2024 Threat Detection Report.
references:
    - https://redcanary.com/threat-detection-report/threats/socgholish/
author: RedCanary, Sigma formatting by Micah Babinski
date: 2024/03/21
tags:
    - attack.discovery
    - attack.t1033
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\wscript.exe'
        Image|endswith: '\cmd.exe'
        CommandLine|contains: 'whoami /all >>'
    condition: selection
falsepositives:
    - Unknown
level: low

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

93e55659-1854-48e1-b349-703524272e42

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

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Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

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