Premium

Overview

Adware:Win32/Premium (often associated with Premium SMS Fraud or aggressive Potentially Unwanted Programs) is a detection for software that deceptively enrolls users in premium-rate services or displays highly intrusive advertisements. While historically prevalent on mobile devices (J2ME and early Android) via 'Premium SMS' trojans, on Windows, this detection generally refers to Adware that forces users into expensive subscriptions or aggressively monetizes their browsing experience.

Understanding Premium (Adware/Fraud)
To an end-user, an infection might manifest as unexpected charges on a phone bill (if a mobile device was tethered/synced) or an overwhelming barrage of pop-up ads demanding payment for fake tech support or software subscriptions. For a security team, it represents a breach of endpoint hygiene and a vector for financial fraud against the organization or its employees (`T1496`).

Execution and Hijacking Mechanics
Premium Adware is typically distributed via deceptive software bundles, fake codec installers, or malicious advertising networks (`T1189`). Upon execution, it modifies the Windows Registry (`T1112`) and installs persistent browser extensions (`T1176`). It may redirect the user's browser to affiliate sites that attempt to trick them into entering a phone number to 'verify' an account, which actually subscribes them to a $10/week premium SMS service. It also intercepts web traffic to inject sponsored links directly into legitimate websites (`T1562.001`).

Indicators of Compromise & Impact
The impact ranges from a severely degraded user experience to direct financial loss. Host-based IoCs include EDR alerts for modifications to browser shortcut properties, unexpected additions to browser extension directories, or anomalous BHO registrations. Network IoCs include DNS queries resolving to known adware or affiliate marketing 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_PREMIUM {
    meta:
        description = "Detects Premium (trojan)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "premium" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Premium Activity
id: a288195832f8717bca4671416014a464
status: experimental
description: Detects generic indicators of the premium malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*premium*"
    condition: selection
level: medium

Containment & Response Steps

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

1. Remove any unknown or recently installed browser extensions or toolbars from Chrome, Edge, Internet Explorer, and Firefox.
2. Use the Windows Control Panel to thoroughly uninstall explicitly named adware programs.
3. Reset all installed web browsers to their default settings to clear out hijacked homepages, search engines, and modified preferences.
4. Run a thorough scan with an enterprise-grade Adware/PUA removal tool to clean up deep registry persistence mechanisms.

What to Avoid

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

1. Do not enter any personal information, especially phone numbers or credit card details, into pop-ups generated by this software.
2. Avoid simply changing the homepage back manually; if the adware extension is still present, the changes will revert on the next launch.

References & External Analysis

• Search "premium" on VirusTotal (External Analysis)

Frequently Asked Questions

Related Families (Category: trojan)

Explore other malware families in the same category:

• Startp
• Cryptominer
• Ntkrnl
• Korplug
• Skypespam

Machine-readable

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