Unattend.XML File Access Attempt

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

Detects attempts to access the "unattend.xml" file, where credentials might be stored. This file is used during the unattended windows install process.

MITRE ATT&CK coverage

Tactic	Techniques
Credential Access	`T1552.001` Unsecured Credentials: Credentials In Files

Rule body

title: Unattend.XML File Access Attempt
id: 76a26006-0942-430b-8249-bd51d448f8e5
status: test
description: |
    Detects attempts to access the "unattend.xml" file, where credentials might be stored.
    This file is used during the unattended windows install process.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1552.001/T1552.001.md
author: frack113
date: 2024-07-22
tags:
    - attack.credential-access
    - attack.t1552.001
    - detection.threat-hunting
logsource:
    product: windows
    category: file_access
    definition: 'Requirements: Microsoft-Windows-Kernel-File ETW provider'
detection:
    selection:
        FileName|endswith: '\Panther\unattend.xml'
    condition: selection
falsepositives:
    - Unknown
level: low

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    FileName|endswith: '\Panther\unattend.xml'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`FileName`	ends_with	`\Panther\unattend.xml`	`field:"file_name" kind:ends_with value:"\Panther\unattend.xml"`