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Detection rules › Sigma

Live Memory Dump Using Powershell

Status
test
Severity
high
Log source
category ps_script, product windows
Author
Max Altgelt (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects usage of a PowerShell command to dump the live memory of a Windows machine

Known false positives

  • Diagnostics

MITRE ATT&CK coverage

TacticTechniques
Credential Access

Telemetry coverage

ProviderRecord / event type
PowerShellEvent ID 4104: Creating Scriptblock text (MessageNumber of MessageTotal).

Rule body

title: Live Memory Dump Using Powershell
id: cd185561-4760-45d6-a63e-a51325112cae
status: test
description: Detects usage of a PowerShell command to dump the live memory of a Windows machine
references:
    - https://learn.microsoft.com/en-us/powershell/module/storage/get-storagediagnosticinfo?view=windowsserver2022-ps
author: Max Altgelt (Nextron Systems)
date: 2021-09-21
modified: 2022-12-25
tags:
    - attack.credential-access
    - attack.t1003
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains|all:
            - 'Get-StorageDiagnosticInfo'
            - '-IncludeLiveDump'
    condition: selection
falsepositives:
    - Diagnostics
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    ScriptBlockText|contains|all:
        - 'Get-StorageDiagnosticInfo'
        - '-IncludeLiveDump'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
ScriptBlockTextmatch
  • -IncludeLiveDump
  • Get-StorageDiagnosticInfo
field:"ScriptBlockText" kind:match