Abnormal sensitive RPC traffic to multiple hosts from a rarely seen host

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	5 Hours
Deduplication Period	1 Day
Required Data	Requires one of the following data sources: Palo Alto Networks Firewall EAL Logs OR XDR Agent with eXtended Threat Hunting (XTH)
Detector Tags	NDR Lateral Movement Analytics, NDR Unmanaged Subnet Analytics
ATT&CK Tactic	Lateral Movement (TA0008)
ATT&CK Technique	Remote Services (T1021)
Severity	Low

Description

The endpoint performed unfamiliar RPC activity to multiple hosts using a known sensitive interface.

Attacker's Goals

An adversary may enumerate different protocols to gain information and plan its lateral movement over the network.

Investigative actions

• Check if the host is a newly deployed server that provides RPC based services to multiple hosts.
• Verify the legitimacy of the actor process (and its causality) that initiated this RPC traffic.