HackTool:Win32/Mikatz!dha

Installation

A special PowerShell script (Invoke-Mimikatz.ps1) allows PowerShell to perform remote fileless execution of this threat. In essence, fileless execution enables loading of a binary into process space without touching the hard disk. When a fileless binary is loaded directly into memory, it remains invisible for file scanning antivirus solutions.

In a typical credential harvesting scenario,  a malicious hacker can run a PowerShell command to trick the victim's machine to download the script from a malicious server.

Next, the downloaded script uses reflective DLL injection to load and run the threat remotely without storing any files on the disk of the compromised machine.

As a result of this, the malicious hacker can remotely leverage the threat to execute malicious activity like stealing credentials, certificates, and collecting data from the compromised host.

Payload

This threat can:

• Recover and export Windows passwords in clear-text by injecting a DLL into lsass.exe
• Export security certificates
• Fileless execution through PowerShell
• Inject DLLs into running processes
• List running system and user processes
• Obtain all process tokens
• Impersonate a token
• Get a list with loaded kernel drivers
• Get a table with all service calls and corresponding kernel modules names
• Retrieve data about all callback modules that receive notifications for processes, images, threads, registry changes, objects, and file changes
• BSOD the machine
• Modify privileges
• Bypass some Group Policy settings
• Disable some security and event monitoring services
• Bypass Microsoft AppLocker / Software Restriction Polices
• Gather critical data for security and instrumentation software running on the host 

Recover and export Windows credentials

This threat can dump credentials from LSASS (Windows Local Security Account database) including:

• NT Lan Manager (NTLM) password hashes
• LAN Manager password hashes
• Kerberos password, ekeys, tickets, and PIN
• TsPkg (password)
• WDigest (clear-text password)
• LiveSSP (clear-text password)
• SSP (clear-text password)
• DPAPI hashes and keys

It can also:

• Generate Kerberos Golden Tickets (Kerberos TGT logon token ticket attack)
• Generate Kerberos Silver Tickets (Kerberos TGS service ticket attack)
• Export certificates and keys
• Dump cached credentials
• Stop event monitoring
• Patch Terminal Server
• Bypass basic Group Policy Objects

Due to the generic nature of this detection, we are unable to provide specific information about how the threat behaves.

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