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The public catalogue of detection rules. Every entry carries its source, the identifier it had there, its licence and its ATT&CK mapping.

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MediumElastic detection rules

Potential DNS Exfiltration via Excessive Chunked Queries

Identifies potential DNS exfiltration on Windows hosts by detecting a high volume of DNS queries whose subdomain labels follow a chunked encoding pattern (index-payload.base_domain). Attackers split stolen data across many DNS queries to evade volume-based detection; this rule aggregates queries per process, base domain, and five-minute window and flags sessions with many distinct chunk indices and sufficiently long encoded payloads.

ATT&CK coverage

Command and Control

T1572Protocol Tunneling 60 detections cover this technique

Exfiltration

T1048Exfiltration Over Alternative Protocol40 detections cover this technique
- T1048.003Exfiltration Over Unencrypted Non-C2 Protocol 22 detections cover this technique

Detection logic

Published to signed-in readers

The query as its source wrote it, its canonical form, and the content hash that pins this exact revision.

Provenance

Where this detection came from, and what you may do with it.

At source: Open at source
Written by: Elastic
Licence: Elastic License 2.0Read the licence
Published: Aug 27, 2026
Version: 1