Medium Severity

BEC/Fraud: Unsolicited business acquisition offer

Labels

Description

Detects inbound messages with subjects referencing an offer to purchase, combined with body content mentioning private equity, acquiring companies, or discussing an opportunity. These messages are characteristic of fraudulent or unsolicited business acquisition solicitations designed to engage targets in fraudulent financial dealings.

References

No references.

Sublime Security

Created Jun 18th, 2026 • Last updated Jul 6th, 2026

Feed Source

Sublime Core Feed

Source

GitHub

type.inbound
and strings.icontains(subject.base,
                      "Offer to Purchase",
                      "Transaction Opportunity"
)
and (
  strings.icontains(body.plain.raw,
                    "private equity",
                    "acquiring companies",
                    "discuss the opportunity",
                    "pe firm"
  )
  or (
    any(ml.nlu_classifier(body.current_thread.text).entities,
        .name == "financial" and strings.icontains(.text, "purchase")
    )
    and any(ml.nlu_classifier(body.current_thread.text).topics,
            .name == "B2B Cold Outreach" and .confidence == "high"
    )
  )
)

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