Rclone Activity via Proxy

Description

Detects the use of rclone, a command-line program to manage files on cloud storage, via its default user-agent string

Query · sigma

selection:
  c-useragent|startswith: rclone/v
condition: selection

Known false positives

  • Valid requests with this exact user agent to that is used by legitimate scripts or sysadmin operations
Raw source Rclone Activity via Proxy · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Rclone Activity via Proxy
id: 2c03648b-e081-41a5-b9fb-7d854a915091
status: test
description: Detects the use of rclone, a command-line program to manage files on cloud storage, via its default user-agent string
references:
    - https://rclone.org/
    - https://www.kroll.com/en/insights/publications/cyber/new-m365-business-email-compromise-attacks-with-rclone
author: Janantha Marasinghe
date: 2022-10-18
tags:
    - attack.exfiltration
    - attack.t1567.002
logsource:
    category: proxy
detection:
    selection:
        c-useragent|startswith: 'rclone/v'
    condition: selection
falsepositives:
    - Valid requests with this exact user agent to that is used by legitimate scripts or sysadmin operations
level: medium

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