Narrator's Feedback-Hub Persistence

Status: test
Severity: high
Log source: category registry_event, product windows
Author: Dmitriy Lifanov, oscd.community
Source: github.com/SigmaHQ/sigma

Detects abusing Windows 10 Narrator's Feedback-Hub

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1547.001` Boot or Logon Autostart Execution: Registry Run Keys / Startup Folder
Privilege Escalation	`T1547.001` Boot or Logon Autostart Execution: Registry Run Keys / Startup Folder

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 12: RegistryEvent (Object create and delete)
Sysmon	Event ID 13: RegistryEvent (Value Set)
Sysmon	Event ID 14: RegistryEvent (Key and Value Rename)

Rule body

title: Narrator's Feedback-Hub Persistence
id: f663a6d9-9d1b-49b8-b2b1-0637914d199a
status: test
description: Detects abusing Windows 10 Narrator's Feedback-Hub
references:
    - https://giuliocomi.blogspot.com/2019/10/abusing-windows-10-narrators-feedback.html
author: Dmitriy Lifanov, oscd.community
date: 2019-10-25
modified: 2022-03-26
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1547.001
logsource:
    category: registry_event
    product: windows
detection:
    selection1:
        EventType: DeleteValue
        TargetObject|endswith: '\AppXypsaf9f1qserqevf0sws76dx4k9a5206\Shell\open\command\DelegateExecute'
    selection2:
        TargetObject|endswith: '\AppXypsaf9f1qserqevf0sws76dx4k9a5206\Shell\open\command\(Default)'
    # Add the payload in the (Default)
    condition: 1 of selection*
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

1 of selection*

Stage 1: `selection1`

selection1:
    EventType: DeleteValue
    TargetObject|endswith: '\AppXypsaf9f1qserqevf0sws76dx4k9a5206\Shell\open\command\DelegateExecute'

Stage 2: `selection2`

selection2:
    TargetObject|endswith: '\AppXypsaf9f1qserqevf0sws76dx4k9a5206\Shell\open\command\(Default)'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`EventType`	eq	`DeleteValue` corpus 5 (sigma 4, splunk 1)	`field:"EventType" kind:eq value:"DeleteValue"`
`TargetObject`	ends_with	`\AppXypsaf9f1qserqevf0sws76dx4k9a5206\Shell\open\command\(Default)` `\AppXypsaf9f1qserqevf0sws76dx4k9a5206\Shell\open\command\DelegateExecute`	`field:"TargetObject" kind:ends_with`

Narrator's Feedback-Hub Persistence

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection1

Stage 2: selection2

Indicators

Stage 0: `condition`

Stage 1: `selection1`

Stage 2: `selection2`