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Home/ATT&CK/T1521
MITRE ATT&CK Technique

T1521: Encrypted Channel

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Adversaries may explicitly employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol. Despite the use of a secure algorithm, these implementations may be vulnerable to reverse engineering if necessary secret keys are encoded and/or generated within malware samples/configuration files.

Tactics
Command and Control
Platforms
Android, iOS

▪Sub-techniques (3)

T1521.001Symmetric CryptographyT1521.002Asymmetric CryptographyT1521.003SSL Pinning

▪Software using this technique (2)

S0302TwitoormalwareS1095AhRatmalware

▪Reference

T1521on MITRE ATT&CK

MITRE ATT&CK® is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.