RedMimicry Winnti Playbook Registry Manipulation

Status: test
Severity: high
Log source: category registry_event, product windows
Author: Alexander Rausch
Source: github.com/SigmaHQ/sigma

Detects actions caused by the RedMimicry Winnti playbook

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1112` Modify Registry
Defense Impairment	`T1112` Modify Registry

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: RedMimicry Winnti Playbook Registry Manipulation
id: 5b175490-b652-4b02-b1de-5b5b4083c5f8
status: test
description: Detects actions caused by the RedMimicry Winnti playbook
references:
    - https://redmimicry.com
author: Alexander Rausch
date: 2020-06-24
modified: 2021-11-27
tags:
    - attack.persistence
    - attack.defense-impairment
    - attack.t1112
logsource:
    product: windows
    category: registry_event
detection:
    selection:
        TargetObject|contains: HKLM\SOFTWARE\Microsoft\HTMLHelp\data
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    TargetObject|contains: HKLM\SOFTWARE\Microsoft\HTMLHelp\data

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`TargetObject`	match	`HKLM\SOFTWARE\Microsoft\HTMLHelp\data`	`field:"TargetObject" kind:match value:"HKLM\SOFTWARE\Microsoft\HTMLHelp\data"`

RedMimicry Winnti Playbook Registry Manipulation

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`