SigmaHQ/rules/windows/process_access/sysmon_invoke_phantom.yml

title: Suspect Svchost Memory Asccess
id: 166e9c50-8cd9-44af-815d-d1f0c0e90dde
status: experimental
description: Detects suspect access to svchost process memory such as that used by Invoke-Phantom to kill the winRM windows event logging service.
author: Tim Burrell
date: 2020/01/02
modified: 2020/08/24
references:
    - https://github.com/hlldz/Invoke-Phant0m
    - https://twitter.com/timbmsft/status/900724491076214784
tags:
    - attack.defense_evasion
    - attack.t1562.002
    - attack.t1089  # an old one
logsource:
    category: process_access
    product: windows
detection:
    selection:
        TargetImage|endswith: '\windows\system32\svchost.exe'
        GrantedAccess: '0x1f3fff'
        CallTrace|contains:
         - 'unknown'
    condition: selection
falsepositives:
    - unknown
level: high