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From 88 lines to 1: Detecting DLL hijacking with Elastic Defend

medelastic_securityPublished 2026-08-28

<p>Elastic Defend 9.5.0 detects dynamic link library (DLL) search-order hijacking [1] in a single field. Writing that rule before 9.5.0 took about 88 lines, covering approximately 2,600 named libraries, 10 excluded Windows system paths, signature checks, and a drop-to-load time window. It now takes one: <code>dll.Ext.defense_evasions: "DLL Hijack: Masquerading"</code>.</p><p>DLL search-order hijac

MITRE ATT&CK techniques

Indicators of compromise

Original source: https://www.elastic.co/security-labs/threat-command/dll-search-order-hijacking-elastic-defend