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

Known false positives

Unlikely

MITRE ATT&CK coverage

Tactic	Techniques
Privilege Escalation	No specific technique

Telemetry coverage

Provider	Record / event type
Security-Auditing	Event ID 4624: An account was successfully logged on.

Rule body

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

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`LogonType`	eq	`9` corpus 8 (sigma 6, elastic 2)	`field:"LogonType" kind:eq value:"9"`
`TargetOutboundUserName`	eq	`thisisnotvaliduser`	`field:"TargetOutboundUserName" kind:eq value:"thisisnotvaliduser"`

DiagTrackEoP Default Login Username

Known false positives

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`