sublimemediumRule

Service abuse: Dropbox Paper with copy-paste instructions

Detects messages containing copy-paste instructions with links to Dropbox Paper documents, commonly used to bypass security controls by instructing users to manually navigate to malicious content.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1036 T1027

initial-accessdefense-evasion

Detection Query

type.inbound
and strings.icontains(body.current_thread.text, 'copy')
and strings.icontains(body.current_thread.text, 'paste')
and any(body.current_thread.links,
        strings.icontains(.display_url.url, 'https://www.dropbox.com/scl/fi/')
        and strings.icontains(.display_url.url, '.paper')
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Service abuse: Dropbox Paper with copy-paste instructions"
description: "Detects messages containing copy-paste instructions with links to Dropbox Paper documents, commonly used to bypass security controls by instructing users to manually navigate to malicious content."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and strings.icontains(body.current_thread.text, 'copy')
  and strings.icontains(body.current_thread.text, 'paste')
  and any(body.current_thread.links,
          strings.icontains(.display_url.url, 'https://www.dropbox.com/scl/fi/')
          and strings.icontains(.display_url.url, '.paper')
  )

attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Social engineering"
  - "Free file host"
  - "Evasion"
detection_methods:
  - "Content analysis"
  - "URL analysis"
id: "5b03f8e6-222f-5112-b111-faff54305b0b"