Analytics BIOC Informational
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Rare MS-Update traffic over HTTP

The endpoint requested an MS-Update operation with abnormal HTTP traffic characteristics.

Module:
Platform Analytics
Data source:
Palo Alto Networks Firewall EAL Logs, XDR Agent
ATT&CK tactics: Lateral Movement (TA0008)
ATT&CK techniques: Exploitation of Remote Services (T1210)
Attacker's goals:

The Windows Server Update Services enable machines to discover and download software updates from a dedicated update server. Attacker may use the MS-Update protocol to execute unauthorized code through Microsoft binaries.

Investigative actions:

Inspect the legitimacy of the server as a WSUS functioning server. Verify that your MS-Update network routine is HTTPS enforced* Verify that this MS-Update server is not a newly deployed server as part of a legitimate IT activity.

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