abusing-dpapi-for-credential-access

1# Abusing DPAPI for Credential Access
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3> **Legal Notice:** This skill is for authorized penetration testing, red-team engagements, and educational purposes only. Extracting credentials from systems you do not own or lack explicit written authorization to test is illegal and may violate computer fraud and abuse laws. Always operate within a signed rules-of-engagement and document every action.
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5## Overview
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7The Windows Data Protection API (DPAPI) is the operating system's built-in symmetric-encryption service that applications use to protect secrets at rest: saved RDP and Windows Credential Manager credentials, web and Wi-Fi credentials in the Credential Vault, browser saved logins and cookies (Chrome/Edge), KeePass keys, certificate private keys, and Scheduled Task passwords. DPAPI derives a per-user (or per-machine) **master key** from the user's password (or the machine account secret), and that master key encrypts individual "DPAPI blobs." The encrypted master keys live under `%APPDATA%\Microsoft\Protect\<SID>\` (user) and `%WINDIR%\System32\Microsoft\Protect\` (machine).
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9Red teamers abuse DPAPI to recover plaintext secrets after gaining a foothold, mapping to MITRE ATT&CK **T1555.004 (Credentials from Password Stores: Windows Credential Manager)**. There are three primary decryption paths:
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111. **Online / context-based** — running as the target user, DPAPI APIs (`CryptUnprotectData`) transparently decrypt the user's blobs. SharpDPAPI's `/unprotect` flag uses this.
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