sublimemediumRule

BEC/Fraud: Fake investment outreach from suspicious TLD

Detects fake investment solicitation emails using "Investment into {company}" subject lines from suspicious TLDs. This campaign targets businesses with templated cold outreach purporting to represent family offices or private equity firms, using disposable domains with DGA-like characteristics.

MITRE ATT&CK

T1566.002 T1534 T1656 T1566 T1598

initial-access

Detection Query

type.inbound
and strings.istarts_with(subject.base, 'investment into')
and sender.email.domain.tld in $suspicious_tlds

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Tags

Attack surface reduction

Raw Content

name: "BEC/Fraud: Fake investment outreach from suspicious TLD"
description: |
  Detects fake investment solicitation emails using "Investment into {company}"
  subject lines from suspicious TLDs. This campaign targets businesses with
  templated cold outreach purporting to represent family offices or private
  equity firms, using disposable domains with DGA-like characteristics.
type: "rule"
severity: "medium"
source: |
  type.inbound
  and strings.istarts_with(subject.base, 'investment into')
  and sender.email.domain.tld in $suspicious_tlds
tags:
 - "Attack surface reduction"
attack_types:
  - "BEC/Fraud"
tactics_and_techniques:
  - "Social engineering"
detection_methods:
  - "Header analysis"
  - "Sender analysis"
  - "Content analysis"
id: "5d4c4a15-661c-5fd1-9d5f-1c72c8230be8"