sublimehighRule

Link: Document sharing invitation template

Detects inbound messages containing text indicating a document sharing invitation with the specific phrase 'has invited you to VIEW the following document:', commonly used in malicious document sharing schemes.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598

initial-access

Detection Query

type.inbound
and strings.contains(body.current_thread.text,
                     'has invited you to VIEW the following document:'
)
and length(body.current_thread.links) > 0

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Link: Document sharing invitation template"
description: "Detects inbound messages containing text indicating a document sharing invitation with the specific phrase 'has invited you to VIEW the following document:', commonly used in malicious document sharing schemes."
type: "rule"
severity: "high"
source: |
  type.inbound
  and strings.contains(body.current_thread.text,
                       'has invited you to VIEW the following document:'
  )
  and length(body.current_thread.links) > 0
attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Social engineering"
  - "Free file host"
detection_methods:
  - "Content analysis"
id: "437a20d4-2ea1-5365-b060-fad8e7a6d32e"