Trusted Design
This technique has been deprecated. Please use Non-Standard Port where appropriate.
Adversaries may communicate over a commonly used port to bypass firewalls or network detection systems and to blend with normal network activity to avoid more detailed inspection. They may use commonly open ports such as
They may use the protocol associated with the port or a completely different protocol.
For connections that occur internally within an enclave (such as those between a proxy or pivot node and other nodes), examples of common ports are
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