T1011 - Exfiltration Over Other Network Medium

Adversaries may attempt to exfiltrate data over a different network medium than the command and control channel. If the command and control network is a wired Internet connection, the exfiltration may occur, for example, over a WiFi connection, modem, cellular data connection, Bluetooth, or another radio frequency (RF) channel.

Adversaries may choose to do this if they have sufficient access or proximity, and the connection might not be secured or defended as well as the primary Internet-connected channel because it is not routed through the same enterprise network.

Atomic Tests:

Currently, no tests are available for this technique.

Detection

Monitor for processes utilizing the network that do not normally have network communication or have never been seen before. Processes that normally require user-driven events to access the network (for example, a web browser opening with a mouse click or key press) but access the network without such may be malicious.

Monitor for and investigate changes to host adapter settings, such as addition and/or replication of communication interfaces.

Shield Active Defense

Security Controls

Alter security controls to make the system more or less vulnerable to attack.

Manipulating security controls involves making configuration changes to the security settings of a system including things like modifying Group Policies, disabling/enabling autorun for removable media, and tightening or relaxing system firewalls, etc.

Opportunity

In an adversary engagement scenario, there is an opportunity to implement security controls to support your defensive objectives over a prolonged engagement.

Use Case

A defender can prevent an adversary from enabling Wi-Fi or Bluetooth interfaces which could be connected to surrounding access points or devices and used for exfiltration.

Procedures

Weaken security controls on a system to allow for leaking of credentials via network connection poisoning. Implement policies on a system to prevent the insecure storage of passwords in the registry. This may force an adversary to revert these changes or find another way to access cached credentials.