Registry Hide Function from User

Status: test
Severity: medium
Log source: category registry_set, product windows
Author: frack113
Source: github.com/SigmaHQ/sigma

Detects registry modifications that hide internal tools or functions from the user (malware like Agent Tesla, Hermetic Wiper uses this technique)

Known false positives

Legitimate admin script

MITRE ATT&CK coverage

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

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 13: RegistryEvent (Value Set)

Rule body

title: Registry Hide Function from User
id: 5a93eb65-dffa-4543-b761-94aa60098fb6
status: test
description: Detects registry modifications that hide internal tools or functions from the user (malware like Agent Tesla, Hermetic Wiper uses this technique)
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1564.001/T1564.001.md
author: frack113
date: 2022-03-18
modified: 2023-08-17
tags:
    - attack.persistence
    - attack.defense-impairment
    - attack.t1112
logsource:
    category: registry_set
    product: windows
detection:
    selection_set_1:
        TargetObject|endswith:
            - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideClock'
            - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAHealth'
            - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCANetwork'
            - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAPower'
            - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAVolume'
        Details: 'DWORD (0x00000001)'
    selection_set_0:
        TargetObject|endswith:
            - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowInfoTip'
            - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowCompColor'
        Details: 'DWORD (0x00000000)'
    condition: 1 of selection_set_*
falsepositives:
    - Legitimate admin script
level: medium

Stages and Predicates

Stage 0: `condition`

1 of selection_set_*

Stage 1: `selection_set_1`

selection_set_1:
    TargetObject|endswith:
        - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideClock'
        - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAHealth'
        - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCANetwork'
        - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAPower'
        - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAVolume'
    Details: 'DWORD (0x00000001)'

Stage 2: `selection_set_0`

selection_set_0:
    TargetObject|endswith:
        - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowInfoTip'
        - 'SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowCompColor'
    Details: 'DWORD (0x00000000)'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`Details`	eq	`DWORD (0x00000000)` corpus 38 (sigma 36, chronicle 2) `DWORD (0x00000001)` corpus 40 (sigma 36, chronicle 4)	`field:"Details" kind:eq`
`TargetObject`	ends_with	`SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowCompColor` `SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowInfoTip` `SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideClock` `SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAHealth` `SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCANetwork` `SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAPower` `SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAVolume`	`field:"TargetObject" kind:ends_with`

Registry Hide Function from User

Known false positives

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection_set_1

Stage 2: selection_set_0

Indicators

Stage 0: `condition`

Stage 1: `selection_set_1`

Stage 2: `selection_set_0`