Couponmarvel

Overview

Executive Summary

Infection Vector and Technical Capabilities

• Browser Hijacking: The adware installs persistent Browser Helper Objects (BHOs) and malicious extensions across Chrome, Firefox, and Internet Explorer. It modifies the browser's default homepage and default search engine to route all traffic through attacker-controlled affiliate portals.
• DOM Manipulation and Ad Injection: CouponMarvel intercepts the rendering of legitimate websites (especially e-commerce sites like Amazon or eBay). It injects its own JavaScript to overlay pages with pop-up ads, sliding banners, and in-text hyperlinks. These ads often promote further malware, technical support scams, or adult content.
• Privacy Violations: To serve targeted advertisements, CouponMarvel silently tracks the user's browsing history, search queries, and geographical location, transmitting this telemetry to third-party marketing servers in violation of standard privacy practices.

Threat Assessment

Remediation and Eradication

• Application Uninstallation: The primary remediation step is to locate and uninstall "CouponMarvel" (or any similarly named, recently installed suspicious programs) via the Windows Control Panel.
• Browser Factory Reset: Because CouponMarvel fundamentally alters browser configurations, the most effective cleanup method is to perform a full factory reset of all installed web browsers. This guarantees the removal of malicious extensions, BHOs, and tracking cookies.
• Anti-Malware Scan: Utilize a reputable enterprise anti-malware solution (specifically tuned for PUPs/Adware) to scan for and remove lingering registry keys (e.g., in `HKLM\Software`) and orphaned files left behind by the uninstaller.

Known aliases

Threat reports may refer to this family under multiple names:

• Adware.CouponMarvel
• PUP.CouponMarvel
• Win32/Adware.CouponMarvel

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:

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.

MITRE D3FEND™ Defensive Countermeasures

Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):

Tiered Detection Rules (Cisco CAIRN Model)

Modern threat detection requires multi-layered rule engineering. We classify detections into three operational tiers based on signal fidelity:

rule MALWARE_WIN_COUPONMARVEL_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Couponmarvel"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "couponmarvel" ascii wide nocase
        $s2 = "adware.couponmarvel" ascii wide nocase
        $s3 = "pup.couponmarvel" ascii wide nocase
        $s4 = "win32/adware.couponmarvel" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Couponmarvel (Ransomware) Execution & Triage
id: d3775ca6-fe64-5d26-af1f-69d7d69d15ba
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Couponmarvel malware family. Detects volume shadow copy deletion, boot
  status tampering, and recovery inhibition characteristic of modern ransomware operations.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/couponmarvel
- https://malware-families-catalog.systemhelpdesk.com/defensive/ransomware-protection
- https://malware-families-catalog.systemhelpdesk.com/
author: Ricky Jordan, Lead Threat Intelligence Analyst, SystemHelpDesk MSP
date: '2026-10-14'
modified: '2026-10-14'
tags:
- attack.ransomware
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1185
- attack.t1176
- attack.t1546_015
logsource:
  category: process_creation
  product: windows
detection:
  selection_process:
    Image|endswith:
    - \vssadmin.exe
    - \wmic.exe
    - \wbadmin.exe
    - \bcdedit.exe
    CommandLine|contains:
    - delete shadows
    - shadowcopy delete
    - resize shadowstorage
    - recoveryenabled no
    - ignoreallfailures
  condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: critical

rule MALWARE_WIN_COUPONMARVEL_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Couponmarvel tradecraft"
        tier = "T3 - Attribution Fingerprint"
        confidence = "High (Confirmed Family Signature)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        // Core family identifier & heuristic payload signatures
        $attrib_str = "couponmarvel" ascii wide nocase
        $pe_magic = "MZ" ascii
        $net_marker = "http" ascii nocase
    condition:
        uint16(0) == 0x5a4d and ($attrib_str and $net_marker) and filesize < 15MB
}

Containment & Response Steps

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

1. Immediately isolate affected host(s) from the internal network (disconnect physical Ethernet and disable Wi-Fi/Bluetooth) to prevent Couponmarvel from spreading laterally or encrypting network-attached storage (NAS) and shared SMB volumes.
2. Preserve volatile system memory (RAM capture) on a representative endpoint before attempting a reboot or power-down, as Couponmarvel symmetric encryption keys or uncompiled payload components may still reside in memory.
3. Audit process execution logs and terminate active scripting interpreters (e.g. PowerShell, CMD, WScript) or commands executing 'vssadmin.exe delete shadows' or 'wbadmin' used by Couponmarvel to inhibit recovery.
4. Investigate the initial compromise vector (such as exposed RDP instances, spearphishing attachments, or vulnerable edge gateways) and enforce an immediate credential reset for all compromised Active Directory accounts.
5. Restore critical assets and databases exclusively from verified, air-gapped, or immutable offline backups once the Couponmarvel binary and related persistence hooks are eradicated.

What to Avoid

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

1. Do not restart or power cycle infected systems prematurely; doing so destroys volatile RAM encryption keys and may trigger bootloader locking logic embedded in Couponmarvel.
2. Avoid negotiating or paying the extortion demand without prior forensic evaluation and consultation with incident response specialists, as payment does not guarantee data recovery.
3. Do not connect clean backup drives or external storage to the affected network until Couponmarvel eradication is completely verified.

References & External Analysis

• Search "couponmarvel" on VirusTotal (External Analysis)
• Search "couponmarvel" on Any.Run (Sandbox Sandbox)
• Search "couponmarvel" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Ransomware)

Explore other documented threats in the same operational category:

• Hkmain
• Lolojan
• Tanspy
• Shrejh
• Mosu
• Satana
• Vake
• Hookmoot

Machine-readable

Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/couponmarvel.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.