SigmaHQ/rules/windows/process_creation/win_malware_emotet.yml

title: Emotet Process Creation
id: d02e8cf5-6099-48cf-9bfc-1eec2d0c7b18
status: experimental
description: Detects all Emotet like process executions that are not covered by the more generic rules
author: Florian Roth
date: 2019/09/30
modified: 2020/09/01
tags:
    - attack.execution
    - attack.t1059.001
    - attack.t1086  # an old one
    - attack.defense_evasion
    - attack.t1027
references:
    - https://app.any.run/tasks/e13ab713-64cf-4b23-ad93-6dceaa5429ac/
    - https://app.any.run/tasks/81f3c28c-c686-425d-8a2b-a98198d244e1/
    - https://app.any.run/tasks/97f875e8-0e08-4328-815f-055e971ba754/
    - https://app.any.run/tasks/84fc9b4a-ea2b-47b1-8aa6-9014402dfb56/
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains:
            - ' -e* PAA'
            - 'JABlAG4AdgA6AHUAcwBlAHIAcAByAG8AZgBpAGwAZQ'  # $env:userprofile
            - 'QAZQBuAHYAOgB1AHMAZQByAHAAcgBvAGYAaQBsAGUA'  # $env:userprofile
            - 'kAGUAbgB2ADoAdQBzAGUAcgBwAHIAbwBmAGkAbABlA'  # $env:userprofile
            - 'IgAoACcAKgAnACkAOwAkA'  # "('*');$
            - 'IAKAAnACoAJwApADsAJA'  # "('*');$
            - 'iACgAJwAqACcAKQA7ACQA'  # "('*');$
            - 'JABGAGwAeAByAGgAYwBmAGQ'
    condition: selection
fields:
    - CommandLine
    - ParentCommandLine
falsepositives:
    - Unlikely
level: critical