Adversaries may steal data by exfiltrating it over a symmetrically encrypted network protocol other than that of the existing command and control channel. The data may also be sent to an alternate network location from the main command and control server.
Symmetric encryption algorithms are those that use shared or the same keys/secrets on each end of the channel. This requires an exchange or pre-arranged agreement/possession of the value used to encrypt and decrypt data.
Network protocols that use asymmetric encryption often utilize symmetric encryption once keys are exchanged, but adversaries may opt to manually share keys and implement symmetric cryptographic algorithms (ex: RC4, AES) vice using mechanisms that are baked into a protocol. This may result in multiple layers of encryption (in protocols that are natively encrypted such as HTTPS) or encryption in protocols that not typically encrypted (such as HTTP or FTP).
View in MITRE ATT&CK®| Capability ID | Capability Description | Mapping Type | ATT&CK ID | ATT&CK Name | Notes |
|---|---|---|---|---|---|
| alerts_for_windows_machines | Alerts for Windows Machines | technique_scores | T1048.001 | Exfiltration Over Symmetric Encrypted Non-C2 Protocol |
Comments
This control may detect suspicious use of the Telegram tool for transferring malicious binaries across hosts. The following alerts may be generated: "Detected potentially suspicious use of Telegram tool".
References
|
| network_security_groups | Network Security Groups | technique_scores | T1048.001 | Exfiltration Over Symmetric Encrypted Non-C2 Protocol |
Comments
This control can reduce the protocols available for data exfiltration. Temporal immediate, coverage substantial.
References
|
| azure_firewall | Azure Firewall | technique_scores | T1048.001 | Exfiltration Over Symmetric Encrypted Non-C2 Protocol |
Comments
This control's threat intelligence-based filtering feature can be enabled to alert and deny traffic from/to known malicious IP addresses and domains. The IP addresses and domains are sourced from the Microsoft Threat Intelligence feed. Because this protection is limited to known malicious IP addresses and domains and does not provide protection from such attacks from unknown domains and IP addresses, this is scored as partial coverage resulting in an overall Partial score.
References
|
| azure_network_traffic_analytics | Azure Network Traffic Analytics | technique_scores | T1048.001 | Exfiltration Over Symmetric Encrypted Non-C2 Protocol |
Comments
This control can identify anomalous traffic with respect specific ports (though it can't identify presence or lack of encryption).
References
|