sublimehighRule

Link: Suspicious file retrieval with recipient targeting

Detects inbound messages containing links with '/getfile/filefor' URL paths that include the recipient's email address, indicating potential targeted file delivery or credential harvesting.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598

initial-access

Detection Query

type.inbound
and any(body.links,
        // observed url path
        strings.icontains(.href_url.path, '/getfile/filefor')
        // with email
        and strings.icontains(.href_url.path, recipients.to[0].email.email)
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Link: Suspicious file retrieval with recipient targeting"
description: "Detects inbound messages containing links with '/getfile/filefor' URL paths that include the recipient's email address, indicating potential targeted file delivery or credential harvesting."
type: "rule"
severity: "high"
source: |
  type.inbound
  and any(body.links,
          // observed url path
          strings.icontains(.href_url.path, '/getfile/filefor')
          // with email
          and strings.icontains(.href_url.path, recipients.to[0].email.email)
  )
attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Social engineering"
detection_methods:
  - "URL analysis"
id: "4acdc184-3fcc-558c-8364-2fe74f413ca3"