Suspicious Kerberos Ticket Request via PowerShell Script

This technique is valuable because the Windows Credential Manager and Windows Password Vault often contain credentials that users have chosen to save for convenience. These stores may hold usernames, passwords, web credentials, application credentials, remote access credentials, and other authentication secrets. If an attacker can access these stored credentials, they may be able to authenticate to additional systems, applications, or services without needing to crack passwords or perform further phishing.

An attacker would typically use this technique after gaining access to a workstation, during the post-compromise phase of an intrusion. Rather than relying solely on the privileges initially obtained, they would attempt to discover whether the compromised user has saved credentials that could provide access to more valuable resources. This can help the attacker expand their access within the environment, move laterally to other systems, access sensitive data, or establish persistence.

The PowerShell-based approach targeted by this detection is attractive because PowerShell is a legitimate administrative tool that is present on Windows systems by default. By using PowerShell to interact with the Password Vault or Credential Manager APIs, an attacker may be able to collect credential information without introducing additional tools that could be detected by security controls. Some offensive scripts also dynamically compile C# code to directly call Windows credential-related APIs, which can provide more flexibility and may help evade simplistic detections that only look for known tool names.

Stolen credentials can enable privilege escalation, access to business-critical systems, lateral movement across the network, and continued access even if the original compromise vector is discovered. For this reason, attempts to enumerate or dump credentials from Windows credential stores are generally considered high-value indicators of malicious post-exploitation activity and are closely monitored by security teams.

Dump Credentials from Windows Credential Manager With PowerShell

Windows Credential Manager is an attractive target because it often contains credentials that users have chosen to store for convenience, such as Remote Desktop, VPN, web application, and enterprise service passwords. If an attacker has already gained access to a system, retrieving these stored credentials can provide access to additional systems, applications, or accounts without needing to crack passwords or generate significant amounts of suspicious authentication traffic.

This technique works by interacting with the Windows Credential Manager or Password Vault APIs that are built into the operating system. Rather than attempting to guess or brute-force credentials, the attacker leverages legitimate system functionality to enumerate and retrieve credentials that the current user is already authorized to access. PowerShell is frequently used because it provides easy access to .NET classes and Windows APIs, allowing credentials stored in the vault to be queried directly from memory through scripts.

Attackers use this technique primarily during the post-compromise phase of an intrusion. After obtaining an initial foothold on a workstation, they often seek additional credentials to expand their access within the environment. Stored credentials may allow them to authenticate to servers, access business applications, connect through VPNs, or move laterally to other systems. In some cases, the harvested credentials can also help attackers escalate privileges if higher-privileged accounts have stored secrets on the compromised device.

Another reason this technique is attractive is that it can blend in with legitimate operating system functionality. The attacker is not exploiting a vulnerability in Credential Manager; instead, they are abusing a legitimate feature that was designed to store and retrieve credentials. As a result, successful credential theft may generate fewer obvious indicators than password spraying, brute-force attacks, or malware that directly steals credentials from browsers or memory.

Ultimately, the objective is to obtain valid credentials that can be used for persistence, privilege escalation, lateral movement, access to sensitive data, or further compromise of the environment. The credentials themselves often become more valuable than the initially compromised endpoint because they can provide access to additional resources across the organization.