Possible DNS Tunneling or Data Exfiltration Activity (ASIM DNS Solution)

Typical domain name lengths are short, whereas domain name queries used for data exfiltration or tunneling can often be very large in size. The hunting query looks for DNS queries that are more than 150 characters long.

Detection logic

Detection requirements

Platform: ESXi IaaS Linux macOS Network Devices Office Suite SaaS Windows
The rule states no platform. This is derived from the 3 ATT&CK techniques it maps to.

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Detection rules

Possible DNS Tunneling or Data Exfiltration Activity (ASIM DNS Solution)

Detection logic

Detection requirements

MITRE ATT&CK mappings

From the source

Licence

Authorship

Detection rules