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 perform calculations on addresses returned in DNS results to determine which port and IP address to use for command and control, rather than relying on a predetermined port number or the actual returned IP address. A IP and/or port number calculation can be used to bypass egress filtering on a C2 channel.(Citation: Meyers Numbered Panda) One implementation of [DNS Calculation](https://attack.mitre.org/techniques/T1568/003) is to take the first three octets of an IP address in a DNS response and use those values to calculate the port for command and control traffic.(Citation: Meyers Numbered Panda)(Citation: Moran 2014)(Citation: Rapid7G20Espionage)