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Explore published rules with transparent provenance, licensing, and ATT&CK mappings.

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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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HighElastic detection rules

Potential Kerberos Coercion via DNS-Based SPN Spoofing

Identifies directory-service access or creation events involving a MicrosoftDNS record that contains a base64-encoded blob matching the pattern "UWhRCA...BAAAA". This blob pattern corresponds to a marshaled CREDENTIAL_TARGET_INFORMATION structure associated with DNS-based SPN spoofing used in Kerberos coercion tradecraft. Adversaries may abuse such records to coerce victim systems into authenticating to attacker-controlled hosts while requesting Kerberos tickets for legitimate services.

ATT&CK coverage

Outside the enterprise matrix

T1187
T1557
T1557.001

Detection requirements

Log source category: event_index

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