Fakesupport

Overview

Adware/Trojan:Win32/Fakesupport is a classification encompassing malware and aggressive adware specifically designed to facilitate Technical Support Scams. Unlike pure ransomware, Fakesupport does not encrypt files; instead, it uses browser hijacking, full-screen overlays, and simulated 'Blue Screen of Death' (BSOD) images to convince the victim their computer is critically infected or locked by law enforcement (`T1491.001`). The goal is to coerce the victim into calling a fraudulent toll-free number provided on the screen.

Understanding Fakesupport (Tech Support Scams)
To a non-technical user, the infection is terrifying. The screen locks, loud alarms may play through the speakers, and legitimate-looking Microsoft or Apple logos warn of impending data loss. For security teams, this represents a highly effective social engineering attack (`T1566.002`). If the user calls the number, the scammers will use remote access tools (like TeamViewer or AnyDesk) to take control of the machine, 'prove' the infection using normal Windows logs, and extort hundreds of dollars for a fake 'lifetime support contract'.

Execution and Deception Mechanics
Fakesupport is often delivered via malvertising (malicious ads that redirect the browser) or bundled with deceptive software. Some variants are purely web-based (JavaScript loops that prevent closing the browser tab), while others are installed locally. Locally installed variants establish persistence (Registry Run keys) and utilize APIs to disable Task Manager and keyboard shortcuts (like Alt+F4) to prevent the user from closing the deceptive full-screen overlay (`T1562.001`).

Indicators of Compromise & Impact
The primary impact is financial loss via fraud and the potential installation of actual backdoors if the user grants the scammers remote access. Host-based IoCs include the presence of anomalous executables generating full-screen overlays and registry modifications explicitly disabling Task Manager (`DisableTaskMgr`). Network IoCs include connections to known malvertising redirectors or domains hosting the fake BSOD templates.

MITRE ATT&CK Techniques

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

Tactical Mitigations

Based on the techniques used by this family, consider the following defensive strategies:

• T1566.002: Inspect email links for known malicious domains and use link-rewriting services for time-of-click analysis.

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

Sigma Rule

title: Suspicious Fakesupport Activity
id: 6703dfc1ea36a028abfef6d3b3a8998e
status: experimental
description: Detects generic indicators of the fakesupport malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*fakesupport*"
    condition: selection
level: medium

Containment & Response Steps

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

1. If the lock screen is active, reboot the machine into 'Safe Mode with Networking' to prevent the Fakesupport malware from launching.
2. Run a full scan with a reputable Adware/Malware removal tool to strip out the persistent executables and restore Task Manager functionality.
3. If the user called the number and granted remote access, assume the machine is fully compromised; a complete forensic wipe and OS reinstall is mandatory.
4. Reset all passwords for accounts that may have been accessed while the scammers had remote control of the machine.

What to Avoid

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

1. Do not call the phone number displayed on the screen under any circumstances.
2. Do not assume the machine is clean just because the overlay was closed; if the scammers had remote access, they likely installed persistent backdoors.

References & External Analysis

• Search "fakesupport" on VirusTotal (External Analysis)

Frequently Asked Questions

Related Families (Category: ransomware)

Explore other malware families in the same category:

• Archsms
• Xxyheo
• Nsanti
• Togapy
• Omyaamfbexii

Machine-readable

Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/fakesupport.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.