Adversaries may attempt to find unsecured credentials in Group Policy Preferences (GPP). GPP are tools that allow administrators to create domain policies with embedded credentials. These policies allow administrators to set local accounts.(Citation: Microsoft GPP 2016) These group policies are stored in SYSVOL on a domain controller. This means that any domain user can view the SYSVOL share and decrypt the password (using the AES key that has been made public).(Citation: Microsoft GPP Key) The following tools and scripts can be used to gather and decrypt the password file from Group Policy Preference XML files: * Metasploit’s post exploitation module: post/windows/gather/credentials/gpp * Get-GPPPassword(Citation: Obscuresecurity Get-GPPPassword) * gpprefdecrypt.py On the SYSVOL share, adversaries may use the following command to enumerate potential GPP XML files: dir /s * .xml

Linked Issues

Issuelinks
Linktyp Issue
is related to Techniques
is blocked by Audit
is blocked by Update Software
is blocked by Active Directory Configuration
is blocked by Detect Access and Decryption of Group Policy Preference (GPP) Credentials in SYSVOL
is blocked by Secure Baseline Configurations
is blocked by Continuous Monitoring
is blocked by Separation of Duties (SoD)
is blocked by Identification & Authentication for Organizational Users
is blocked by Authenticator Management
is blocked by Account Management
is blocked by Least Privilege
is blocked by Secure Software Development Practices (SSDP)
is blocked by Security, Compliance & Resilience Testing Throughout Development
is blocked by Software & Firmware Patching
is blocked by Vulnerability Scanning
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