SigmaHQ/rules/windows/process_creation/win_malware_script_dropper.yml

title: WScript or CScript Dropper
id: cea72823-df4d-4567-950c-0b579eaf0846
status: experimental
description: Detects wscript/cscript executions of scripts located in user directories
author: Margaritis Dimitrios (idea), Florian Roth (rule), oscd.community
date: 2019/01/16
modified: 2020/09/01
tags:
    - attack.execution
    - attack.t1059.005
    - attack.t1059.007
    - attack.defense_evasion  # an old one
    - attack.t1064  # an old one
logsource:
    category: process_creation
    product: windows
detection:
    selection1:
        Image|endswith:
            - '\wscript.exe'
            - '\cscript.exe'
        CommandLine|contains:
            - 'C:\Users\'
            - 'C:\ProgramData\'
    selection2:
        CommandLine|contains:
            - '.jse'
            - '.vbe'
            - '.js'
            - '.vba'
            - '.vbs'
    falsepositive:
        ParentImage|contains: '\winzip'
    condition: selection1 and selection2 and not falsepositive
fields:
    - CommandLine
    - ParentCommandLine
falsepositives:
    - Winzip
    - Other self-extractors
level: high