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Detection rules › Sigma

Registry Entries For Azorult Malware

Status
test
Severity
critical
Log source
product windows, category registry_event
Author
Trent Liffick
Source
github.com/SigmaHQ/sigma

Detects the presence of a registry key created during Azorult execution

MITRE ATT&CK coverage

TacticTechniques
PersistenceT1112 Modify Registry
Defense ImpairmentT1112 Modify Registry

Event coverage

ProviderEventTitle
SysmonEvent ID 12RegistryEvent (Object create and delete)
SysmonEvent ID 13RegistryEvent (Value Set)

Rule body yaml

title: Registry Entries For Azorult Malware
id: f7f9ab88-7557-4a69-b30e-0a8f91b3a0e7
status: test
description: Detects the presence of a registry key created during Azorult execution
references:
    - https://www.trendmicro.com/vinfo/us/threat-encyclopedia/malware/trojan.win32.azoruit.a
author: Trent Liffick
date: 2020-05-08
modified: 2021-11-27
tags:
    - attack.persistence
    - attack.execution
    - attack.defense-impairment
    - attack.t1112
logsource:
    product: windows
    category: registry_event
detection:
    selection:
        EventID:
            - 12
            - 13
        TargetObject|contains: 'SYSTEM\'
        TargetObject|endswith: '\services\localNETService'
    condition: selection
falsepositives:
    - Unknown
level: critical

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    EventID:
        - 12
        - 13
    TargetObject|contains: 'SYSTEM\'
    TargetObject|endswith: '\services\localNETService'

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
TargetObjectends_with
  • \services\localNETService
TargetObjectmatch
  • SYSTEM\ corpus 2 (sigma 2)