sigmamediumHunting

WebDAV Temporary Local File Creation

Detects the creation of WebDAV temporary files with potentially suspicious extensions

MITRE ATT&CK

initial-accessresource-development

Detection Query

selection:
  TargetFilename|contains: \AppData\Local\Temp\TfsStore\Tfs_DAV\
  TargetFilename|endswith:
    - .7z
    - .bat
    - .dat
    - .ico
    - .js
    - .lnk
    - .ps1
    - .rar
    - .vbe
    - .vbs
    - .zip
condition: selection

Author

Micah Babinski

Created

2023-08-21

Data Sources

windowsFile Events

Platforms

windows

References

Tags

attack.initial-accessattack.resource-developmentattack.t1584attack.t1566detection.threat-hunting

Raw Content

title: WebDAV Temporary Local File Creation
id: 4c55738d-72d8-490e-a2db-7969654e375f
related:
    - id: 1ae64f96-72b6-48b3-ad3d-e71dff6c6398
      type: similar
status: test
description: Detects the creation of WebDAV temporary files with potentially suspicious extensions
references:
    - https://www.trellix.com/en-us/about/newsroom/stories/research/beyond-file-search-a-novel-method.html
    - https://micahbabinski.medium.com/search-ms-webdav-and-chill-99c5b23ac462
    - https://dear-territory-023.notion.site/WebDav-Share-Testing-e4950fa0c00149c3aa430d779b9b1d0f?pvs=4
author: Micah Babinski
date: 2023-08-21
tags:
    - attack.initial-access
    - attack.resource-development
    - attack.t1584
    - attack.t1566
    - detection.threat-hunting
logsource:
    product: windows
    category: file_event
detection:
    selection:
        TargetFilename|contains: '\AppData\Local\Temp\TfsStore\Tfs_DAV\'
        TargetFilename|endswith:
            - '.7z'
            - '.bat'
            - '.dat'
            - '.ico'
            - '.js'
            - '.lnk'
            - '.ps1'
            - '.rar'
            - '.vbe'
            - '.vbs'
            - '.zip'
    condition: selection
falsepositives:
    - Legitimate use of WebDAV in an environment
level: medium