Analysis by: Karen Ivy Titiwa
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

This Hacking Tool arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: 7,996,928 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 29 Sep 2020

Arrival Details

This Hacking Tool arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other Details

This Hacking Tool does the following:

  • It is used to brute force and enumerate valid Active Directory accounts through Kerberos Pre-Authentication.
  • It is capable of the following:
    • Brute force username and password combination from a file or stdin
    • Brute force a single user's password from a word list
    • Help about any command
    • Test a single password against a list of users
    • Enumerate valid domain usernames via Kerberos
    • Display version info and quit
  • It accepts the following parameters:
    • --dc string - location of the Domain Controller (KDC) to target (default lookup is via DNS)
    • --delay int - indicates the delay in millisecond between each attempt
    • -d, --domain string - domain to be used
    • -h, --help - help information
    • -o, --output string - indicates file where logs will be written
    • --safe - runs in safe mode (default is false)
    • -t, --threads int - indicates number of threads to be used (default is 10)
    • -v, --verbose - log failures and errors

  SOLUTION

Minimum Scan Engine: 9.850
SSAPI PATTERN File: 2.338.52
SSAPI PATTERN Date: 29 Sep 2020

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Identify and terminate files detected as HackTool.Win64.KerBrute.A

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Scan your computer with your Trend Micro product to delete files detected as HackTool.Win64.KerBrute.A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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