Abnormal network communication with a rare combination of HTTP User Agent and HTTP Server

Analytics BIOC Informational

Abnormal network communication with a rare combination of HTTP User Agent and HTTP Server

Abnormal network communication with a rare combination of HTTP User Agent and HTTP Server to an external address.

Module:: Platform Analytics
Data source:: Palo Alto Networks Firewall EAL Logs, XDR Agent

ATT&CK tactics: Command and Control (TA0011) Exfiltration (TA0010)

ATT&CK techniques: Web Service (T1102) Exfiltration Over Web Service (T1567)

Attacker's goals:

Data exfiltration, attack tool staging or command and control channel through a trusted service.

Investigative actions:

Examine the legitimacy of the application that produced this rare combination of HTTP User Agent with the external HTTP Server. Examine the parent process of this application. Check for anomalies at the time when the communication occurred.

Test period:: N/A (single event)
Deduplication:: 1 Day

1 variation:

Abnormal network communication with a rare combination of HTTP User Agent and HTTP Server where both the User Agent and the HTTP Server are rare Low (parent: Informational)