Detectors

Every Cortex detection rule the toolbox knows about — analytics alerts, BIOCs and correlation rules — in one filterable set.

27 detectors match the current filters. tactic: TA0001 ✕

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Type Name Severity Module Data source / event ATT&CK
Analytics BIOC Display text URL differs from actual URL An email contains a hyperlink whose display text shows a URL different from the actual destination URL. Informational Email Security Microsoft 365 Emails Initial Access
Analytics BIOC Email attachment with a potentially malicious file extension The email message includes attachments with file types that are typically blocked by the email vendor as a precaution due to their suspicious nature. Informational Email Security Microsoft 365 Emails Initial Access, Execution
Analytics BIOC Email marked as spam and bulk based on Spam Confidence Level and Bulk Complaint Level values The Spam Confidence Level (SCL) and Bulk Complaint Level (BCL) values, detected in the email's antispam headers, indicate that a message is more likely to be spam. Informational Email Security Microsoft 365 Emails Reconnaissance, Initial Access
Analytics BIOC Email mimics replies or forwards without an actual ongoing conversation An email with a subject line or body that includes signs of a reply or forward without an actual ongoing conversation. Informational Email Security Microsoft 365 Emails Initial Access
Analytics BIOC Email sent using an automated system or script detected The message contains X-PHP-Script or X-PHP-Originating-Script headers, indicating it was generated by an automated PHP script or web application. While often legitimate, this behavior is frequently associated with shared hosting abuse, phishing kits, and compromised web applications. Informational Email Security Microsoft 365 Emails Initial Access
Analytics BIOC Email was received from an unknown address using a public provider domain The email was received from an unknown address, that was seen for the first time in the organization in the past month, and registered under a public provider. Informational Email Security Microsoft 365 Emails Reconnaissance, Initial Access
Analytics BIOC Email was received from an unknown sender using a disposable domain The email was received from an unknown sender using a disposable email provider, first seen in the organization in the past month. Low Email Security Microsoft 365 Emails Reconnaissance, Initial Access
Analytics BIOC Email with file-sharing link containing auto-download parameter The email contains a link to a file-sharing service that includes parameters likely to trigger automatic download. Low Email Security Microsoft 365 Emails Initial Access, Execution
Analytics BIOC Exchange anti-phish policy disabled or removed A user disabled or removed an Exchange anti-phish policy, which may indicate evasion of a possible phishing campaign. Low Identity Threat Detection (ITDR), SaaS Threat Detection, Email Security Office 365 Audit Defense Evasion, Initial Access
Analytics BIOC Exchange DKIM signing configuration disabled A user disabled an Exchange DomainKeys Identified Mail (DKIM) signing configuration. DKIM helps ensure that emails are authorized and not spoofed. Low Identity Threat Detection (ITDR), SaaS Threat Detection, Email Security Office 365 Audit Defense Evasion, Initial Access
Analytics BIOC Exchange Safe Attachment policy disabled or removed A user disabled an Exchange Safe Attachment policy, which provides phishing protection to email attachments. Low Identity Threat Detection (ITDR), SaaS Threat Detection, Email Security Office 365 Audit Defense Evasion, Initial Access
Analytics BIOC Exchange Safe Link policy disabled or removed A user disabled an Exchange Safe Link policy, which provides phishing protection to emails that contain hyperlinks. Low Identity Threat Detection (ITDR), SaaS Threat Detection, Email Security Office 365 Audit Defense Evasion, Initial Access
Analytics Numerous emails sent by a single sender to multiple internal recipients Numerous emails were sent to multiple internal recipients. This may indicate spam or any other malicious attempt. Informational Email Security Microsoft 365 Emails Initial Access
Analytics Potential Phishing has been detected This email contains multiple indicators consistent with a phishing attack. The message likely attempts to steal credentials, distribute malware, or trick recipients into performing actions that compromise security through deceptive content or suspicious technical characteristics. Medium Email Security Box Audit Log, DropBox, Google Workspace Audit Logs, Microsoft 365 Emails, Office 365 Audit, Okta Audit Log Initial Access
Analytics BIOC Potential spoofing of internal domain spotted An external sender is possibly impersonating an employee by spoofing the company's internal address. Informational Email Security Microsoft 365 Emails Initial Access, Defense Evasion
Analytics BIOC Quarantined email released to recipients This message was previously quarantined by vendor and has now been released and delivered to the intended recipients. Informational Email Security Microsoft 365 Emails Initial Access
Analytics BIOC Rarely seen sender address in the organization An email was received from a sender that has not been observed in the organization in the last 30 days. Informational Email Security Microsoft 365 Emails Reconnaissance, Initial Access
Analytics BIOC Rarely seen sender domain in the organization An email was received from a domain that has not been observed in the organization in the last 30 days. Informational Email Security Microsoft 365 Emails Reconnaissance, Initial Access
Analytics BIOC Sending unusual file(s) to an external address Unusual files sent to an external address. Low Email Security Microsoft 365 Emails Initial Access, Exfiltration
Analytics Suspicious sender exhibiting automated sending patterns Multiple messages from a single sender were observed over a short period, all having the same subject and differing body content. This repetitive pattern may indicate automated or scripted behavior. Informational Email Security Microsoft 365 Emails Initial Access
Analytics Suspicious sending domain with sender address randomization Multiple messages from a single sender domain were observed over a short period, each using a unique sender address. This per-message sender randomization is uncommon for legitimate senders and suggests automated behavior. Informational Email Security Microsoft 365 Emails Initial Access
Analytics BIOC Training simulation email detected This email was flagged as part of a training simulation. Low Email Security Microsoft 365 Emails Initial Access
Analytics BIOC Uncommon URL domain(s) in your organization detected in email We have identified unpopular domain(s) in URL(s) within this email. Informational Email Security Microsoft 365 Emails Initial Access, Execution
Analytics BIOC Unrecognized internal address (AAD mismatch) An email was received from an address using an internal domain, but the sender is not found in Active Directory. This may indicate an impersonation attempt or domain spoofing. Informational Email Security Microsoft 365 Emails Initial Access
Analytics BIOC Unusual display name in From header An email was detected with an unusual display name in the From header. Informational Email Security Microsoft 365 Emails Reconnaissance, Initial Access
Analytics BIOC Unusual file-sharing links for mailbox owner The email contains unusual file-sharing link(s) for mailbox owner. Informational Email Security Microsoft 365 Emails Initial Access, Execution
Analytics BIOC X-Forefront-Antispam-Report has flagged this email as a potential threat This email has been categorized by X-Forefront-Antispam-Report as a threat, suggesting it is likely malicious in nature (e.g., spam, phishing, impersonation, etc.). Informational Email Security Microsoft 365 Emails Initial Access, Defense Evasion, Execution