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InformationalSplunk security contentRaven Tait +1

Unusual HTTP Request Method

The following analytic detects Zeek HTTP requests using methods outside a configurable allowlist of standard and commonly used HTTP methods. Unusual methods can indicate protocol abuse, exploitation attempts, or…

Description

The following analytic detects Zeek HTTP requests using methods outside a configurable allowlist of standard and commonly used HTTP methods. Unusual methods can indicate protocol abuse, exploitation attempts, or command-and-control traffic. Review the method, source, destination, and URI to assess the activity.

Detection logic

Detection requirements

Platform
ContainersESXiIaaSLinuxmacOSNetwork DevicesWindows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source category
zeek_http

Known benign triggers

  • Some legitimate applications and frameworks may use non-standard HTTP methods. Review the method and destination to determine whether the traffic is expected, then add confirmed legitimate methods to the allowlist.

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