detection.wiki

Detection rules › Sigma

Suspicious Query of MachineGUID

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

Use of reg to get MachineGuid information

MITRE ATT&CK coverage

TacticTechniques
DiscoveryT1082 System Information Discovery

Event coverage

ProviderEventTitle
SysmonEvent ID 1Process creation
Security-AuditingEvent ID 4688A new process has been created.

Rule body yaml

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

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
CommandLinematch
  • /v corpus 2 (sigma 2)
  • MachineGuid
  • SOFTWARE\Microsoft\Cryptography
Imageends_with
  • \reg.exe corpus 58 (sigma 58)