1Password Secret Retrieval — Methodology and Implementation

This blog post details a researcher's methodology and proof-of-concept for extracting plaintext vault entries from the 1Password Windows client by loading/injecting into 1Password.exe, invoking library exports (get_item_data, decrypt_with_vault_key), and using ClrMD heap analysis; the author walks through four attempts, describes how to obtain necessary access (including DACL modification to enable injection from medium integrity), and provides detection guidance and mitigations.