CertUtil LOLBin Abuse: Download, Decode, or Encode via Suspicious Flags

Ankit Mehta@Secvyn

•updated Jun 30, 2026•1•0•1

Detects the abuse of the CertUtil.exe Windows utility to download, decode, encode, or split files. This behavior is considered suspicious when initiated by common command-line shells or Office applications, which are frequently used as entry points for malicious scripts or macro-based attacks.