Suspicious Query of MachineGUID

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

Use of reg to get MachineGuid information

MITRE ATT&CK coverage

Tactic	Techniques
Discovery	`T1082` System Information Discovery

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

title: Suspicious Query of MachineGUID
id: f5240972-3938-4e56-8e4b-e33893176c1f
status: test
description: Use of reg to get MachineGuid information
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1082/T1082.md#atomic-test-8---windows-machineguid-discovery
author: frack113
date: 2022-01-01
tags:
    - attack.discovery
    - attack.t1082
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\reg.exe'
        CommandLine|contains|all:
            - 'SOFTWARE\Microsoft\Cryptography'
            - '/v '
            - 'MachineGuid'
    condition: selection
falsepositives:
    - Unknown
level: low

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Image|endswith: '\reg.exe'
    CommandLine|contains|all:
        - 'SOFTWARE\Microsoft\Cryptography'
        - '/v '
        - 'MachineGuid'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`/v` corpus 2 (sigma 2) `MachineGuid` `SOFTWARE\Microsoft\Cryptography`	`field:"CommandLine" kind:match`
`Image`	ends_with	`\reg.exe` corpus 58 (sigma 58)	`field:"Image" kind:ends_with value:"\reg.exe"`

Suspicious Query of MachineGUID

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`