Medium Severity

Service abuse: Freshbooks callback scam

Labels

Callback Phishing
Social engineering
Natural Language Understanding
Sender analysis

Description

Detects inbound messages sent from the freshbooks.com root domain where the body text is classified by an NLU model as containing callback scam intent with medium or high confidence. This identifies legitimate Freshbooks infrastructure being abused to deliver callback scam lures.

References

No references.

Sublime Security
Created Oct 21st, 2026 • Last updated Oct 21st, 2026
Feed Source
Sublime Core Feed
Source
GitHub
type.inbound
and sender.email.domain.root_domain == "freshbooks.com"
and any(ml.nlu_classifier(body.current_thread.text).intents,
        .name == "callback_scam" and .confidence != "low"
)
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