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xHunt Malware Framework

First observed in 2018, xHunt is a malware framework created by the SectorD01 advanced persistent threat for use in their campaigns throughout Europe, East and South Asia, and the United States. Originally called Sakabota, it is believed to have been split into several modules in order for SectorD01 to properly compartmentalise their tools.

Threat ID:
CC-3275
Category:
Threat Severity:
Medium
Threat Vector:
Published:
31 October 2019 12:00 AM
Report a cyber attack: call 0300 303 5222 or email [email protected]

Summary

First observed in 2018, xHunt is a malware framework created by the SectorD01 advanced persistent threat for use in their campaigns throughout Europe, East and South Asia, and the United States. Originally called Sakabota, it is believed to have been split into several modules in order for SectorD01 to properly compartmentalise their tools.

Affected platforms

The following platforms are known to be affected:

Microsoft Windows

  • Microsoft Windows - All versions

Threat details

Originally called Sakabota, it is believed to have been split into several modules in order for SectorD01 to properly compartmentalise their tools. xHunt initial payloads are delivered via sophisticated spear-phishing campaigns or supply chain compromises. SectorD01 will perform extensive reconnaissance and data collection on potential targets, which include shipping, telecommunications, and governmental organisations.

As it is a modular framework, xHunt campaigns can be tailored for specific targets, with modules able to be installed and removed as needed. At the time of publication, the following modules have been identified:

  • Sakabota - Primary xHunt module. Able to deliver subsequent modules as well as the Mimikatz credential harvesting tool sign with PsExec and WMIC. It will also initiate a connection with the primary command and control (C2) server.
  • Hisoka - Modular backdoor that uses both HTTP and DNS for C2 communications.
  • Killua - Believed to be a newer version of Hisoka with no added functionality.
  • Netero - Embedded tool used by Hisoka for C2 communications using Exchange Web Server. Netero will then pass emails containing instructions for Hisoka to take.
  • Diezen - Backdoor with similarities to Hisoka. Uses a proprietary non-HTTP protocol over 443 to connect to a C2 server. Appears to have been superseded in later campaigns by Hisoka and Gon.
  • Gon - Lightweight post-exploitation remote access trojan focused on port scanning, password brute-forcing, and creating RDP sessions.
  • EYE - Monitors SectorD01 RDP sessions on affected systems. It will then attempt to close all processes and remove all files associated with xHunt when the sessions are ended.

Remediation steps

Type Step

To prevent and detect an infection, ensure that:

  • A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails.
  • All operating systems, anti-virus and other security products are kept up-to-date.
  • Regular anti-virus and security scans are performed on your organisation’s estate.
  • All day-to-day computer activities such as email and internet are performed using non-administrative accounts.
  • Strong password policies are in place.
  • Network, proxy and firewall logs should be monitored for suspicious activity.
  • User accounts accessed from affected devices should be reset on a clean computer.
  • Your organisation adopts a holistic all-round approach to Cyber Security as advocated by the 10 Steps to Cyber Security.

Last edited: 14 February 2020 2:54 pm