Detectors
Every Cortex detection rule the toolbox knows about — analytics alerts, BIOCs and correlation rules — in one filterable set.
7 detectors match the current filters.
Download CSV| Type | Name | Severity | Module | Data source / event | ATT&CK |
|---|---|---|---|---|---|
| Analytics | Failed Connections The endpoint has failed connections to other endpoints that have been inactive for more than 24 hours, or that Cortex XDR Analytics has never seen on the network. The endpoint has made an abnormally large number of these failed connections and/or is attempting to connect to an abnormal mixture of missing or inactive endpoints. Your network might contain legitimate scanners that could cause a false positive for this alert. Cortex XDR Analytics attempts to filter these out by checking if a scanner has been active for a long consecutive period of time. Consequently, if this alert is seen, it represents new activity on your network. An attacker may be trying to move laterally, or to scan different parts of the network to look for other endpoints that expose a specific service. Worms also perform a similar activity to automatically infect additional hosts in the network. | Low | Platform Analytics | Palo Alto Networks Firewall traffic Logs, XDR Agent, Third-Party Firewalls | Discovery |
| Analytics | Large Upload (HTTPS) The endpoint transferred an excessive amount of data to an external site over HTTPS. The destination is not a popular upload site for endpoints on your network, and the endpoint performing the upload has not previously downloaded a large amount of data from the site. The upload is considered excessive based on comparison to baseline measurements of HTTPS data transfers on your network. An attacker may be exfiltrating data directly to the internet. | Low | Platform Analytics | Palo Alto Networks Firewall traffic Logs, XDR Agent, Third-Party Firewalls | Exfiltration |
| Analytics | Large Upload (SMTP) The endpoint, which is not an internal SMTP server, emailed an excessive amount of data from your network. | Low | Platform Analytics | Palo Alto Networks Firewall traffic Logs, XDR Agent, Third-Party Firewalls | Exfiltration |
| Analytics | New Administrative Behavior The endpoint performed new administrative actions, relative to its previously profiled behavior. It is possible that an endpoint will infrequently be used for administrative activities, so analytics is performed using logs collected over a long period of time, also comparing the activity to that of other endpoints. That is, if many endpoints are contacting the same destination with the same administrative activity, then this network activity is less likely to result in this alert. An attacker may be operating on the host, probing other computers and moving laterally inside the network using a trusted computer and credentials. Attackers typically exhibit administrative behaviors when performing reconnaissance and lateral movement. | Medium | Platform Analytics | Palo Alto Networks Firewall traffic Logs, XDR Agent, Third-Party Firewalls | Lateral Movement |
| Analytics | Port Scan The endpoint connected, or attempted to connect, to multiple privileged ports, which are infrequently used by other endpoints (i.e. destination ports that are normally used by many endpoints will not raise this alert). Attackers perform port scans for reconnaissance purposes, to find computers or servers that accept connections on these ports, and to find vulnerable services that can be exploited. Coverage for port scans using data arriving solely from Cortex agents is incomplete. | Informational | Platform Analytics | Palo Alto Networks Firewall traffic Logs, Third-Party Firewalls | Discovery |
| Analytics | Port Sweep The endpoint connected, or attempted to connect, to multiple hosts using privileged ports that serve a well-defined function. Attackers perform port sweep for reconnaissance purposes, to find computers or servers that accept connections on these ports, and to find vulnerable services that can be exploited. Coverage for port sweeps using data arriving solely from Cortex agents is incomplete. | Informational | Platform Analytics | Palo Alto Networks Firewall traffic Logs, XDR Agent, Third-Party Firewalls | Discovery |
| Analytics | Spam Bot Traffic The endpoint connected to an excessive number of external SMTP servers. A spambot may be trying to send spam email using multiple SMTP servers. Spambots can cause your domain to be blacklisted, and can contain other malicious functionality. The same mechanism can also be used for exfiltration. Some VPN clients can also tunnel data over SMTP. Note: This detection model looks for SMTP connections to external servers, but the volume of traffic is not considered. A count is performed based on the number of domains being contacted, as well as the number of unresolved IP addresses. | Low | Platform Analytics | Palo Alto Networks Firewall traffic Logs, XDR Agent, Third-Party Firewalls | Impact |