Windows CryptoAPI Spoofing Vulnerability (CVE-2020-0601 - CurveBall)

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Windows CryptoAPI Spoofing Vulnerability (CVE-2020-0601 - CurveBall)

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A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) certificates. An attacker could exploit the vulnerability by using a spoofed code-signing certificate to sign a malicious executable, making it appear the file was from a trusted, legitimate source.

Rule type: query

Rule indices:

  • winlogbeat-*
  • logs-windows.*

Severity: low

Risk score: 21

Runs every: 5m

Searches indices from: None (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Defense Evasion
  • Use Case: Vulnerability

Version: 103

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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event.provider:"Microsoft-Windows-Audit-CVE" and message:"[CVE-2020-0601]" and host.os.type:windows

Framework: MITRE ATT&CKTM