CVE-2021-1675 VS mimikatz

Mimikatz

Typically, Mimikatz is used to extract NTLM password hashes or Kerberos tickets from memory. However, one of its lesser-known capabilities is the ability to extract plaintext passwords from dumps created for the LSASS process. This means that an attacker can compromise plaintext passwords without running any nefarious code on domain controllers. Dump files can be created interactively or using ProcDump , and in either case, the activity is unlikely to be flagged by anti-virus software. Once the dumps are created, they can be copied off the domain controller and the plaintext credentials can be harvested using Mimikatz offline.

Mimikatz can be used to perform pass-the-ticket, but in this post, we wanted to show how to execute the attack using another tool, Rubeus , lets you perform Kerberos based attacks. Rubeus is a C# toolset written by harmj0y and is based on the Kekeo project by Benjamin Delpy, the author of Mimikatz .

What is DCShadow? DCShadow is a command in the Mimikatz tool that enables an adversary to register a rogue domain controller and replicate malicious changes across the domain.

Mimikatz provides a variety of ways to extract and manipulate credentials, but one of the most alarming is the DCSync command. Using this command, an adversary can simulate the behavior of a domain controller and ask other domain controllers to replicate information — including user password data. In fact, attackers can get any account’s NTLM password hash or even its plaintext password, including the password of the KRBTGT account, which enables them to create Golden Tickets.

Using Mimikatz , it is possible to leverage the password of the KRBTGT account to create forged Kerberos Ticket Granting Tickets (TGTs) which can be used to request Ticket Granting Server (TGS) tickets for any service on any computer in the domain.

Using the ChangeNTLM and SetNTLM commands in Mimikatz , attackers can manipulate user passwords and escalate their privileges in Active Directory . Let’s take a look at these commands and what they do.

Mimikatz will extract local tickets and save them to disk for offline cracking. Simply install Mimikatz and issue a single command: