Search Evasion Techniques
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Modify Authentication Process: Domain Controller Authentication Defense Evasion [Mitre]
Adversaries may patch the authentication process on a domain controller to bypass the typical authentication mechanisms and enable access to accounts.
Malware may be used to inject false credentials into the authentication process on a domain controller with the intent of creating a backdoor used to access any user’s account and/or credentials (ex: Skeleton Key). Skeleton key works through …
Rogue Domain Controller Defense Evasion [Mitre]
Adversaries may register a rogue Domain Controller to enable manipulation of Active Directory data. DCShadow may be used to create a rogue Domain Controller (DC). DCShadow is a method of manipulating Active Directory (AD) data, including objects and schemas, by registering (or reusing an inactive registration) and simulating the behavior of a DC. Once registered, a rogue DC may be …
Domain Member Sandbox Evasion
This technique determines if a host is a member of an Active Directory Domain without API calls. It helps prevent malicious payload execution in enterprise sandboxes that are not members of an Active Directory domain. The validation is done by checking the "LoggonServer" and "ComputerName" environment variables. If the host is logged into a domain controller, the "LoggonServer" value will …
Modify Authentication Process: Password Filter DLL Defense Evasion [Mitre]
Adversaries may register malicious password filter dynamic link libraries (DLLs) into the authentication process to acquire user credentials as they are validated.
Windows password filters are password policy enforcement mechanisms for both domain and local accounts. Filters are implemented as DLLs containing a method to validate potential passwords against password policies. Filter DLLs can be positioned on local computers …