// MITRE ATT&CK
T1600.001 · Reduce Key Space
Sub-technique of T1600 · Weaken Encryption.
Adversaries may reduce the level of effort required to decrypt data transmitted over the network by reducing the cipher strength of encrypted communications.(Citation: Cisco Synful Knock Evolution) Adversaries can weaken the encryption software on a compromised network device by reducing the key si...
How to detect & mitigate it
Detecting Reduce Key Space starts with your SIEM/EDR telemetry. Write a detection rule with the Sigma generator, analyze suspicious logs in the log analyzer, and place the technique on your coverage with the ATT&CK matrix.
Related techniques
T1687
Exploitation for Defense Impairment T1556.003
Pluggable Authentication Modules T1578.004
Revert Cloud Instance T1222.002
Linux and Mac Permissions T1666
Modify Cloud Resource Hierarchy T1685.003
Modify or Spoof Tool UI T1685.001
Disable or Modify Windows Event Log T1578
Modify Cloud Compute Infrastructure
Exploitation for Defense Impairment T1556.003
Pluggable Authentication Modules T1578.004
Revert Cloud Instance T1222.002
Linux and Mac Permissions T1666
Modify Cloud Resource Hierarchy T1685.003
Modify or Spoof Tool UI T1685.001
Disable or Modify Windows Event Log T1578
Modify Cloud Compute Infrastructure
Source: MITRE ATT&CK®. ATT&CK is a registered trademark of The MITRE Corporation. Content for educational purposes.