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Credential Dumping: GMSA
- Credential Dumping: GMSA involves attackers exploiting misconfigured Group Managed Service Accounts (gMSA) to retrieve passwords.
- Attackers can abuse misconfigured gMSA permissions to extract passwords and authenticate as service accounts.
- The extracted gMSA credentials enable lateral movement, privilege escalation, and persistence in the domain.
- Attackers can leverage retrieved NT hash for Pass-the-Hash or Overpass-the-Hash attacks to access network resources.
- Properly securing gMSA permissions and monitoring account access is crucial to prevent such attacks.
- Group Managed Service Accounts (gMSA) are specialized Active Directory accounts for secure automated services.
- gMSAs improve security by automatically rotating passwords, eliminating manual management, and enabling multi-machine use.
- Key concepts include automatic password generation, controlled password storage, and access definitions for gMSAs.
- Attackers can abuse ReadGMSAPassword privilege to steal gMSA passwords, perform Pass-the-Hash attacks, and run malicious services.
- Exploitation methods like gMSADumper, nxc, ntlmrelayx, ldap_shell, and GMSAPasswordReader are used for credential dumping.
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