{
  "family": "coupons",
  "sample_count": 5,
  "category": "advanced_threat",
  "description": "Adware:Win32/Coupons (often part of a family of 'deal-finding' browser extensions) is an intrusive adware component designed to forcibly alter a user's web browsing experience. It injects unwanted advertisements, pop-ups, and in-text links into legitimate websites, and tracks user browsing behavior to generate illicit Pay-Per-Click (PPC) revenue for its creators under the guise of finding online discounts.<br><br><b>Understanding Coupons Adware</b><br>To an end-user, Coupons manifests as a sudden barrage of pop-up ads offering 'exclusive deals', heavily modified search results, and extreme system sluggishness while browsing. For a security team, it represents a breakdown in endpoint hygiene and a potential vector for more serious infections via malvertising (malicious advertising).<br><br><b>Execution and Injection Mechanics</b><br>Coupons is typically distributed via deceptive software bundles or misleading advertisements downloaded from third-party sites (`T1189`). Upon execution, it installs a persistent browser extension (`T1176`) in Chrome, Edge, or Firefox. It may also modify the Windows Registry (`T1112`) to enforce its settings (`T1562.001`). Once active, it intercepts web traffic locally, inserting its own JavaScript into the DOM of every webpage the user visits to render its own advertisements, effectively performing a localized Man-in-the-Middle (MitM) attack for ad fraud.<br><br><b>Indicators of Compromise & Impact</b><br>The impact is a degraded user experience, potential privacy violations (tracking of shopping and search queries), and exposure to potentially malicious ads. Host-based IoCs include EDR alerts for unexpected additions to browser extension directories or unverified binaries loading into the browser process space. Network IoCs include DNS queries resolving to the adware's tracking infrastructure and HTTP requests injecting the 'coupon' overlay scripts.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1562.001",
    "T1112",
    "T1176",
    "T1189"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1176",
      "name": "Browser Extensions (Installing malicious adware add-ons)",
      "tactic": "Persistence"
    },
    {
      "id": "T1112",
      "name": "Modify Registry",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1562.001",
      "name": "Impair Defenses: Disable or Modify Tools",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1189",
      "name": "Drive-by Compromise",
      "tactic": "Initial Access"
    }
  ],
  "containment_steps": [
    "Remove any unknown or recently installed 'shopping' or 'coupon' browser extensions from Chrome, Edge, and Firefox.",
    "Reset all installed web browsers to their default settings to clear out hijacked preferences.",
    "Check the system 'Programs and Features' for any explicitly installed shopping toolbars and uninstall them.",
    "Run a thorough scan with an enterprise-grade Adware/PUA removal tool to clean up deep registry persistence mechanisms."
  ],
  "what_to_avoid": [
    "Do not assume the adware is harmless; many adware networks are compromised by threat actors to distribute ransomware via malvertising.",
    "Avoid allowing users to download software from unverified third-party portals or click on misleading 'Download' banners."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}