title: APT40 Dropbox Tool User Agent
id: 5ba715b6-71b7-44fd-8245-f66893e81b3d
status: experimental
description: Detects suspicious user agent string of APT40 Dropbox tool
author: Thomas Patzke
references:
    - Internal research from Florian Roth
date: 2019/11/12
modified: 2020/09/02
logsource:
    category: proxy
detection:
    selection:
      c-useragent: 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.143 Safari/537.36'
      r-dns: 'api.dropbox.com'
    condition: selection
fields:
    - c-ip
    - c-uri
falsepositives:
    - Old browsers
level: high
tags:
    - attack.command_and_control
    - attack.t1071.001
    - attack.t1043  # an old one
    - attack.exfiltration
    - attack.t1567.002
    - attack.t1048  # an old one