Base16 or Base32 Encoding/Decoding Activity

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Base16 or Base32 Encoding/Decoding Activity

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Adversaries may encode/decode data in an attempt to evade detection by host- or network-based security controls.

Rule type: query

Rule indices:

  • auditbeat-*
  • logs-endpoint.events.*

Severity: low

Risk score: 21

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

  • Elastic
  • Host
  • Linux
  • Threat Detection
  • Defense Evasion

Version: 101

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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event.category:process and event.type:(start or process_started) and
  process.name:(base16 or base32 or base32plain or base32hex)

Framework: MITRE ATT&CKTM