Impacket Tutorial Demonstrates Active Directory Password Reset Techniques

Summary

An Impacket tutorial demonstrates resetting or changing Active Directory passwords through ForceChangePassword, hash/AES/TGT authentication, and SMB-SAMR, RPC-SAMR, LDAP, and kpasswd. It also covers Windows event detection and AD defenses.

Key points

The tutorial demonstrates using the ForceChangePassword permission to reset another user’s password without knowing the original password.
impacket-changepasswd supports SMB-SAMR, RPC-SAMR, LDAP, and kpasswd, with protocol-specific behavior.
Authentication examples cover plaintext credentials, Pass-the-Hash, NT hash setting, AES keys, and Kerberos TGT caches.
The article identifies Windows Event IDs 4723, 4724, 4738, 4771, and 5136 as useful for monitoring password changes, resets, and directory modifications.
Recommended defenses include auditing Active Directory permissions, limiting delegated reset rights, monitoring SAMR activity, and enforcing LDAP signing and channel binding.

Article Details

Topic: Impacket's impacket-changepasswd utility for changing and resetting Active Directory passwords across multiple authentication methods and protocols, with detection and defensive guidance.

MITRE ATT&CK

T1098 · Account ManipulationThe article describes forcibly resetting another Active Directory user's password to take over the account.T1550.002 · Pass the HashThe article demonstrates authenticating with an NT hash to perform a password reset using Pass-the-Hash.T1550.003 · Pass the TicketThe article describes using a Kerberos TGT cache to authenticate for password operations.

Products

Microsoft Active Directoryimpacket-changepasswd consolidates multiple Active Directory password change and reset techniques — including ForceChangePassword, pass-the-hash, NT hash injection, AES key usage, and Kerberos TGT-based resets — across

Tools

ADACLScannerDefensive measures include regular AD ACL audits (BloodHound/ADACLScanner), tiered administration, Protected Users, LDAP signing/channel binding, and monitoring SAMR traffic.BloodHoundDefensive measures include regular AD ACL audits (BloodHound/ADACLScanner), tiered administration, Protected Users, LDAP signing/channel binding, and monitoring SAMR traffic.getTGTWhen a valid TGT already exists in a ccache file (obtained via getTGT, rubeus, or similar tools), the -k flag will use it directly:Impacketimpacket-changepasswd consolidates multiple Active Directory password change and reset techniques — including ForceChangePassword, pass-the-hash, NT hash injection, AES key usage, and Kerberos TGT-based resets — across impacket-changepasswdimpacket-changepasswd consolidates multiple Active Directory password change and reset techniques — including ForceChangePassword, pass-the-hash, NT hash injection, AES key usage, and Kerberos TGT-based resets — across NetExecSuccessful attacks can be validated via NetExec (nxc) and leave forensic traces in Event IDs like 4723, 4724, and 4738.PingCastleAudit AD ACLs regularly: Tools like BloodHound, ADACLScanner, or PingCastle can identify over-permissive Reset Password ACEs RubeusWhen a valid TGT already exists in a ccache file (obtained via getTGT, rubeus, or similar tools), the -k flag will use it directly: