Medium Severity

Service abuse: Oracle Cloud Workflow callback scam

Labels

Callback Phishing
Social engineering
Impersonation: Brand
Sender analysis
HTML analysis
Natural Language Understanding

Description

Detects inbound messages sent through Oracle Cloud's workflow mail service (workflow.mail.us2.cloud.oracle.com) that contain callback scam content within styled HTML table cells. Natural language understanding is used to identify callback scam intent with medium or high confidence within the message body, indicating misuse of legitimate Oracle infrastructure to deliver fraudulent content.

References

No references.

Sublime Security
Created Jul 10th, 2026 • Last updated Jul 10th, 2026
Feed Source
Sublime Core Feed
Source
GitHub
type.inbound
and sender.email.domain.domain == "workflow.mail.us2.cloud.oracle.com"
and any(html.xpath(body.html,
                   "//td[contains(@style, 'padding: 20px 40px')]//font[@style='']"
        ).nodes,
        any(ml.nlu_classifier(.inner_text).intents,
            .name == "callback_scam" and .confidence != "low"
        )
)
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