ATT&CK MATRIX
Reference · MITREThe full MITRE ATT&CK Enterprise kill chain — every tactic column and technique cell, collected fresh from MITRE's public STIX. Cell intensity = how many tracked threat groups use the technique; ◆ = cited in advisories we collect. Click a technique for detail; filter by group to see one actor's playbook.
Adversaries may use traffic signaling to hide open ports or other malicious functionality used for persistence or command and control. Traffic signaling involves the use of a magic value or sequence that must be sent to a system to trigger a special response, such as opening a closed port or executing a malicious task. This may take the form of sending a series of packets with certain characteristics before a port will be opened that the adversary can use for command and control. Usually this series of packets consists of attempted connections to a predefined sequence of closed ports (i.e. [Port Knocking](https://attack.mitre.org/techniques/T1205/001)), but can involve unusual flags, specifi…