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Detection rules › Sigma

DiagTrackEoP Default Login Username

Status
test
Severity
critical
Log source
product windows, service security
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects the default "UserName" used by the DiagTrackEoP POC

MITRE ATT&CK coverage

TacticTechniques
Privilege EscalationNo specific technique

Event coverage

ProviderEventTitle
Security-AuditingEvent ID 4624An account was successfully logged on.

Rule body yaml

title: DiagTrackEoP Default Login Username
id: 2111118f-7e46-4fc8-974a-59fd8ec95196
status: test
description: Detects the default "UserName" used by the DiagTrackEoP POC
references:
    - https://github.com/Wh04m1001/DiagTrackEoP/blob/3a2fc99c9700623eb7dc7d4b5f314fd9ce5ef51f/main.cpp#L46
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-03
tags:
    - attack.privilege-escalation
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 4624
        LogonType: 9
        TargetOutboundUserName: 'thisisnotvaliduser'
    condition: selection
falsepositives:
    - Unlikely
level: critical

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    EventID: 4624
    LogonType: 9
    TargetOutboundUserName: 'thisisnotvaliduser'

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
LogonTypeeq
  • 9 corpus 8 (sigma 6, elastic 2)
TargetOutboundUserNameeq
  • thisisnotvaliduser