Detection rules › Sigma

Process Execution From WebDAV Share

Status
experimental
Severity
low
Log source
category process_creation, product windows
Author
Swachchhanda Shrawan Poudel (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects execution of processes with image paths starting with WebDAV shares (\), which might indicate malicious file execution from remote web shares. Execution of processes from WebDAV shares can be a sign of lateral movement or exploitation attempts, especially if the process is not a known legitimate application. Exploitation Attempt of vulnerabilities like CVE-2025-33053 also involves executing processes from WebDAV paths.

Known false positives

  • Legitimate use of WebDAV shares for process execution
  • Known applications executing from WebDAV paths

MITRE ATT&CK coverage

TacticTechniques
Command & Control

Telemetry coverage

Rule body

title: Process Execution From WebDAV Share
id: f8de9dd5-7a63-4cfd-9d0c-ae124878b5a9
status: experimental
description: |
    Detects execution of processes with image paths starting with WebDAV shares (\\), which might indicate malicious file execution from remote web shares.
    Execution of processes from WebDAV shares can be a sign of lateral movement or exploitation attempts, especially if the process is not a known legitimate application.
    Exploitation Attempt of vulnerabilities like CVE-2025-33053 also involves executing processes from WebDAV paths.
references:
    - https://research.checkpoint.com/2025/stealth-falcon-zero-day/
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-06-13
tags:
    - attack.execution
    - attack.command-and-control
    - attack.lateral-movement
    - attack.t1105
    - detection.threat-hunting
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|startswith: '\\\\'
        Image|contains: '\DavWWWRoot\'
    condition: selection
falsepositives:
    - Legitimate use of WebDAV shares for process execution
    - Known applications executing from WebDAV paths
level: low

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image|startswith: '\\\\'
    Image|contains: '\DavWWWRoot\'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Imagematch
  • \DavWWWRoot\ corpus 3 (sigma 3)
field:"Image" kind:match value:"\DavWWWRoot\"
Imagestarts_with
  • \\\\ corpus 4 (sigma 4)
field:"Image" kind:starts_with value:"\\\\"