sublimemediumRule

Link: Google Drawings link from new sender

Detects messages containing Google Drawings links from previously unseen senders, which may indicate abuse of Google's drawing service for malicious content delivery.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1534 T1656

initial-access

Detection Query

type.inbound
// google drawings link
and any(body.current_thread.links,
        .href_url.domain.domain == "docs.google.com"
        and strings.istarts_with(.href_url.path, '/drawings')
        and (
          strings.icontains(.href_url.path, '/preview')
          or any(ml.nlu_classifier(body.current_thread.text).intents,
                 .name == "cred_theft" and .confidence != "low"
          )
        )
)
and profile.by_sender_email().prevalence == "new"

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Link: Google Drawings link from new sender"
description: "Detects messages containing Google Drawings links from previously unseen senders, which may indicate abuse of Google's drawing service for malicious content delivery."
type: "rule"
severity: "medium"
source: |
  type.inbound
  // google drawings link
  and any(body.current_thread.links,
          .href_url.domain.domain == "docs.google.com"
          and strings.istarts_with(.href_url.path, '/drawings')
          and (
            strings.icontains(.href_url.path, '/preview')
            or any(ml.nlu_classifier(body.current_thread.text).intents,
                   .name == "cred_theft" and .confidence != "low"
            )
          )
  )
  and profile.by_sender_email().prevalence == "new"
attack_types:
  - "Credential Phishing"
  - "BEC/Fraud"
tactics_and_techniques:
  - "Social engineering"
detection_methods:
  - "URL analysis"
  - "Sender analysis"
id: "fb91c892-c511-53ad-bc46-58ef23db95fb"