Webdevaz

Overview

Adware/Trojan:Win32/Webdevaz is an intrusive Potentially Unwanted Program (PUP) categorized as a malicious Browser Modifier or Adware. It is designed to forcibly alter a user's web browsing experience across multiple browsers to inject unwanted advertisements, redirect search traffic, and track browsing behavior to generate illicit Pay-Per-Click (PPC) revenue.

Understanding Webdevaz
To an end-user, Webdevaz manifests as a sudden influx of unremovable toolbars, persistent pop-up ads, and the forced redirection of their default search engine to a low-quality, third-party portal. For a security team, it represents a breakdown in endpoint hygiene and a potential vector for more serious infections via malvertising (`T1189`).

Execution and Hijacking Mechanics
Webdevaz is typically distributed via deceptive software bundles (wrappers) or fake software updates. Upon execution, it requests administrative privileges and modifies the Windows Registry (`T1112`) and browser configuration files. It forces the installation of malicious browser extensions (`T1176`) and alters the default homepage. To prevent easy removal, it often establishes a persistence mechanism, such as a scheduled task (`T1053.005`) that actively monitors the browser settings and reinstalls the malicious extensions if the user attempts to delete them.

Indicators of Compromise & Impact
The impact is a severely degraded user experience and exposure to potentially malicious ads. Host-based IoCs include EDR alerts for anomalous registry modifications targeting `Start Page` or `Search Page` values, unexpected additions to the `Extensions` directory in Chrome/Edge, and the presence of unknown scheduled tasks running browser processes with hidden arguments. Network IoCs include DNS queries resolving to known adware tracking infrastructure.

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to the MITRE ATT&CK framework:

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_WEBDEVAZ {
    meta:
        description = "Detects Webdevaz (trojan)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "webdevaz" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Webdevaz Activity
id: b0e864f3aadd4ffbe5531ee6ce2f0e16
status: experimental
description: Detects generic indicators of the webdevaz malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*webdevaz*"
    condition: selection
level: medium

Containment & Response Steps

Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.

1. Use the Windows Control Panel to uninstall the explicitly named adware program, checking for recently installed, unknown applications.
2. Open the Windows Task Scheduler and meticulously review all tasks, deleting any associated with the Webdevaz persistence loop.
3. Reset all web browsers (Chrome, Edge, Firefox) to their default settings to clear out hijacked homepages and extensions.
4. Run a thorough scan with an enterprise-grade Adware/PUA removal tool to clean up the remaining registry hijacks.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not simply change the homepage back manually in the browser settings without removing the scheduled task, or it will just revert.
2. Avoid allowing users to download software or browser extensions from unverified third-party portals.

References & External Analysis

• Search "webdevaz" on VirusTotal (External Analysis)

Frequently Asked Questions

Related Families (Category: trojan)

Explore other malware families in the same category:

• Picsys
• Generictka
• Xiaobaminer
• Kura
• Bankfraud

Machine-readable

Get this profile as JSON: https://jordanricky1604-ship-it.github.io/malware-families-catalog/api/webdevaz.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.