Bhoint
Overview
Executive Summary
Bhoint is a classification for a specific type of persistent Adware and Browser Hijacker that operates primarily by installing malicious Browser Helper Objects (BHOs) into Internet Explorer (and historically other browsers supporting COM-based plugins). Its objective is to aggressively inject advertisements, monitor user browsing habits, and redirect traffic to affiliate-monetized websites.Infection Vector and Technical Capabilities
Bhoint is almost exclusively distributed via deceptive software bundling. Users typically encounter it when downloading freeware from third-party aggregators, where the BHO is registered silently with the Windows OS during the primary software's setup. Upon execution, Bhoint establishes deep integration with the system's web rendering engine:- BHO Registration and Hijacking: The software registers a COM object as a BHO in the Windows Registry (`HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects`). This ensures the malicious code is loaded every time the browser starts, effectively hijacking the browser's functionality.
- DOM Manipulation and Ad Injection: Bhoint intercepts the rendering of legitimate websites, injecting its own HTML/JavaScript to overlay pages with pop-up ads, sliding banners, and in-text hyperlinks. It replaces legitimate ads to steal revenue.
- Telemetry and Privacy Violation: The BHO continuously tracks the user's browsing history and search queries, transmitting this telemetry to remote servers for targeted advertising and profile building.
Threat Assessment
While Bhoint is typically not designed for data destruction, it poses a severe threat to system stability, user productivity, and privacy. The constant ad injection consumes significant system resources, and BHOs run with the same privileges as the browser, making them a significant security risk if the adware infrastructure is compromised by more severe actors.Remediation and Eradication
- BHO Unregistration: Standard antivirus often struggles with BHOs. Utilize a reputable enterprise anti-malware solution or tools like Sysinternals Autoruns to identify and unregister the specific malicious COM objects associated with Bhoint.
- Registry Cleanup: Manually (or via script) remove the associated registry keys under the `Browser Helper Objects` hive to ensure the DLLs are not re-loaded.
- Browser Factory Reset: Following the removal of the underlying files and registry keys, a full factory reset of the affected web browsers is required to purge any modified search preferences or homepages.
Known aliases
Threat reports may refer to this family under multiple names:
MITRE ATT&CK Techniques
This family has been observed using the following ATT&CK techniques: T1185 T1176 T1546.015
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1185: Enforce strong MFA and use browser isolation or hardened browsers for sensitive financial or administrative portals to defeat session hijacking.
Generated Detections (Boilerplate)
These YARA and Sigma rules are auto-generated based on the family name and aliases. They must be heavily tuned before deployment in a production environment.
YARA Rule
rule MALWARE_WIN_BHOINT {
meta:
description = "Detects Bhoint (advanced_threat)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "bhoint" ascii wide nocase
$s2 = "adware.bhoint" ascii wide nocase
$s3 = "pup.bhoint" ascii wide nocase
$s4 = "win32/adware.bho" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Bhoint Activity
id: 2cbff3f2d95832f5060d092252450e16
status: experimental
description: Detects generic indicators of the bhoint malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*bhoint*"
- "*adware.bhoint*"
- "*pup.bhoint*"
- "*win32/adware.bho*"
condition: selection
level: mediumReferences & External Analysis
- Search "bhoint" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Bhoint Advanced_Threat from Windows?
Manual removal of Bhoint is highly discouraged as it may leave persistence mechanisms intact. We recommend disconnecting the device from the internet and utilizing a professional incident response service or enterprise-grade EDR software to conduct a full forensic sweep.
Is Bhoint a virus or a Advanced_Threat?
Bhoint is classified as a Advanced_Threat. Unlike traditional viruses that infect files, modern malware like Bhoint typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Bhoint infection?
Symptoms of Bhoint can include unexpected system slowness, unauthorized outbound network traffic to unknown IP addresses, disabled security software, and suspicious background processes running from AppData or Temp directories.
Related Families (Category: advanced_threat)
Explore other malware families in the same category:
Protect Your Network Against Advanced_Threats
Want to prevent Bhoint and similar threats from compromising your organization? Read our comprehensive defensive guide: Suspect an Infection? What to do.
Machine-readable
Get this profile as JSON: https://jordanricky1604-ship-it.github.io/malware-families-catalog/api/bhoint.json
Ecosystem & Interactive Environments
This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.