diff --git a/detection-rules/headers_replyto_new_domain_nlu_request.yml b/detection-rules/headers_replyto_new_domain_nlu_request.yml index c26b16bc096..65b1bd2945b 100644 --- a/detection-rules/headers_replyto_new_domain_nlu_request.yml +++ b/detection-rules/headers_replyto_new_domain_nlu_request.yml @@ -9,14 +9,11 @@ source: | and any(headers.reply_to, // mismatched reply-to and sender domain .email.domain.root_domain != sender.email.domain.root_domain - // newly registered reply-to domain and beta.whois(.email.domain).days_old <= 30 ) - // request is being made and any(ml.nlu_classifier(body.current_thread.text).entities, .name == "request") - // there's financial/urgency OR a tag of medium/high confidence and ( any(ml.nlu_classifier(body.current_thread.text).entities, .name in ("financial", "urgency")) @@ -24,13 +21,8 @@ source: | .name is not null and .confidence in ("medium", "high") ) ) - and ( - profile.by_sender().prevalence in ("new", "outlier") - or ( - profile.by_sender().any_messages_malicious_or_spam - and not profile.by_sender().any_false_positives - ) - ) + and not profile.by_sender().any_false_positives + attack_types: - "BEC/Fraud" tactics_and_techniques: