Initial Access (TA0001)(external, opens in a new tab or window)
microsoft_exchange_online_message_trace(external, opens in a new tab or window)
text code block:from logs-microsoft_exchange_online_message_trace.* metadata _id, _version, _index // Filter for Azure Monitor notification emails with financial/billing themed subjects | where event.dataset == "microsoft_exchange_online_message_trace.log" and email.from.address == "azure-noreply@microsoft.com" and event.outcome in ("success", "unknown") and email.subject like "*Azure Monitor alert*" and ( email.subject like "*INV-*" or email.subject like "*invoice*" or email.subject like "*payment*" or email.subject like "*order-*" or email.subject like "*purchase*" or email.subject like "*funds*" or email.subject like "*receipt*" or email.subject like "*billing*" or email.subject like "*transaction*" or email.subject like "*refund*" or email.subject like "*charge*" or email.subject like "*subscription*" or email.subject like "*renewal*" or email.subject like "*overdue*" or email.subject like "*past due*" or email.subject like "*amount due*" or email.subject like "*wire transfer*" or email.subject like "*bank account*" or email.subject like "*credit card*" or email.subject like "*financial*" or email.subject like "*remittance*" ) | keep *
Install detection rules in Elastic Security
Detect M365 Azure Monitor Alert Email with Financial or Billing Theme in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).