sigmamediumHunting

Cloudflared Tunnel Connections Cleanup

Detects execution of the "cloudflared" tool with the tunnel "cleanup" flag in order to cleanup tunnel connections.

MITRE ATT&CK

command-and-control

Detection Query

selection:
  CommandLine|contains|all:
    - " tunnel "
    - "cleanup "
  CommandLine|contains:
    - "-config "
    - "-connector-id "
condition: selection

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-05-17

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.command-and-controlattack.t1102attack.t1090attack.t1572

Raw Content

title: Cloudflared Tunnel Connections Cleanup
id: 7050bba1-1aed-454e-8f73-3f46f09ce56a
status: test
description: Detects execution of the "cloudflared" tool with the tunnel "cleanup" flag in order to cleanup tunnel connections.
references:
    - https://github.com/cloudflare/cloudflared
    - https://developers.cloudflare.com/cloudflare-one/connections/connect-apps
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-17
modified: 2023-12-21
tags:
    - attack.command-and-control
    - attack.t1102
    - attack.t1090
    - attack.t1572
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - ' tunnel '
            - 'cleanup '
        CommandLine|contains:
            - '-config '
            - '-connector-id '
    condition: selection
falsepositives:
    - Legitimate usage of Cloudflared.
level: medium