malware has altered the NTLM authentication program on domain controllers to allow  to login without a valid credential.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: malware has altered the NTLM authentication program on domain controllers to allow  to login without a valid credential. ### Response: T1556.001.