(SIGMA) SIGMA_proc_creation_win_shadow_copies_deletion

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title: Shadow Copies Deletion Using Operating Systems Utilities
id: c947b146-0abc-4c87-9c64-b17e9d7274a2
status: stable
description: Shadow Copies deletion using operating systems utilities
author: Florian Roth, Michael Haag, Teymur Kheirkhabarov, Daniil Yugoslavskiy, oscd.community, Andreas Hunkeler (@Karneades)
date: 2019/10/22
modified: 2021/10/24
references:
    - https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
    - https://blog.talosintelligence.com/2017/05/wannacry.html
    - https://securingtomorrow.mcafee.com/other-blogs/mcafee-labs/new-teslacrypt-ransomware-arrives-via-spam/
    - https://www.bleepingcomputer.com/news/security/why-everyone-should-disable-vssadmin-exe-now/
    - https://www.hybrid-analysis.com/sample/ed01ebfbc9eb5bbea545af4d01bf5f1071661840480439c6e5babe8e080e41aa?environmentId=100
    - https://github.com/Neo23x0/Raccine#the-process
    - https://github.com/Neo23x0/Raccine/blob/main/yara/gen_ransomware_command_lines.yar
    - https://redcanary.com/blog/intelligence-insights-october-2021/
tags:
    - attack.defense_evasion
    - attack.impact
    - attack.t1070
    - attack.t1490
logsource:
    category: process_creation
    product: windows
detection:
    selection1:
        Image|endswith:
            - '\powershell.exe'
            - '\wmic.exe'
            - '\vssadmin.exe'
            - '\diskshadow.exe'
        CommandLine|contains|all:
            - shadow  # will match "delete shadows" and "shadowcopy delete" and "shadowstorage"
            - delete
    selection2:
        Image|endswith:
            - '\wbadmin.exe'
        CommandLine|contains|all:
            - delete
            - catalog
            - quiet # will match -quiet or /quiet
    selection3:
        Image|endswith: '\vssadmin.exe'
        CommandLine|contains|all:
            - resize
            - shadowstorage
            - unbounded
    condition: 1 of selection*
fields:
    - CommandLine
    - ParentCommandLine
falsepositives:
    - Legitimate Administrator deletes Shadow Copies using operating systems utilities for legitimate reason
level: critical

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