Suspicious Windows Strings In URI
Detects suspicious Windows strings in URI which could indicate possible exfiltration or webshell communication
Detection logic
selection
cs-uri-query|contains:
- =C:/Users
- =C:/Program%20Files
- =C:/Windows
- =C%3A%5CUsers
- =C%3A%5CProgram%20Files
- =C%3A%5CWindowsCondition
selectionRaw YAML
title: Suspicious Windows Strings In URI
id: 9f6a34b4-2688-4eb7-a7f5-e39fef573d0e
status: test
description: Detects suspicious Windows strings in URI which could indicate possible exfiltration or webshell communication
references:
- https://thedfirreport.com/2022/06/06/will-the-real-msiexec-please-stand-up-exploit-leads-to-data-exfiltration/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-06
modified: 2023-01-02
tags:
- attack.persistence
- attack.exfiltration
- attack.t1505.003
logsource:
category: webserver
detection:
selection:
cs-uri-query|contains:
- '=C:/Users'
- '=C:/Program%20Files'
- '=C:/Windows'
- '=C%3A%5CUsers'
- '=C%3A%5CProgram%20Files'
- '=C%3A%5CWindows'
condition: selection
falsepositives:
- Legitimate application and websites that use windows paths in their URL
level: highFalse positives
- Legitimate application and websites that use windows paths in their URL