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[Tuning] Microsoft Azure or Mail Sign-in from a Suspicious Source #4723

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[Tuning] Microsoft Azure or Mail Sign-in from a Suspicious Source #4723

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4 changes: 2 additions & 2 deletions rules/cross-platform/initial_access_azure_o365_with_network_alert.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
creation_date = "2025/04/29"
integration = ["azure", "o365"]
maturity = "production"
updated_date = "2025/04/29"
updated_date = "2025/05/15"
min_stack_version = "8.17.0"
min_stack_comments = "Elastic ES|QL query functions limitation."

Expand Down Expand Up @@ -94,7 +94,7 @@ FROM logs-*, .alerts-security.*
// aggregated alerts count by bucket and by source.ip
| stats total_alerts = count(*), is_mail_access = COUNT_DISTINCT(mail_access_src_ip), is_azure = COUNT_DISTINCT(azure_src_ip), unique_dataset = COUNT_DISTINCT(event.dataset),is_network_alert = COUNT_DISTINCT(network_alert_src_ip), datasets = VALUES(event.dataset), rules = VALUES(kibana.alert.rule.name), cat = VALUES(event.category) by source_ip = TO_IP(source.ip)
// filter for cases where there is a successful sign-in to azure or m365 mail and the source.ip is reported by a network external alert.
| where is_network_alert > 0 and (is_mail_access > 0 or is_azure > 0 and unique_dataset >= 2)
| where is_network_alert > 0 and unique_dataset >= 2 and (is_mail_access > 0 or is_azure > 0) and total_alerts <= 100
'''


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