LSA Whisperer BOF is a Cobalt Strike Beacon Object File (BOF) port of Evan McBroom's LSA Whisperer tool, enabling red team operators to interact with Windows authentication packages (MSV1_0, Kerberos, CloudAP) through legitimate LSA client APIs (LsaCallAuthenticationPackage). It recovers DPAPI credential keys (including under Credential Guard), dumps Kerberos tickets as base64 .kirbi blobs, performs selective ticket purging, extracts Entra ID/AD FS SSO cookies, and generates NTLMv1 responses for hash cracking—all without opening handles to LSASS or touching process memory. The architecture comprises three independent BOF modules (msv1_0, kerberos, cloudap) sharing a common LSA communication layer and comprehensive header definitions for undocumented LSA structures. The code is well-structured, handles privilege separation (untrusted vs. trusted LSA connections), and provides detailed error messages. It targets red team operations and requires Cobalt Strike for execution.