{
  "family": "drmsoft",
  "sample_count": 10,
  "category": "advanced_threat",
  "description": "PUA:Win32/Drmsoft is a Potentially Unwanted Program (PUA) and adware family often bundled with video converters, media players, or software that promises to strip Digital Rights Management (DRM) from media files. While the core software may provide the promised media conversion, it heavily subsidizes its free cost by silently installing browser hijackers, aggressive tracking cookies, and injecting intrusive advertisements.<br><br><b>Understanding Drmsoft Adware</b><br>To an end-user, Drmsoft is highly annoying. They download a tool to convert a video file, and suddenly their browser homepage is changed, their default search engine is locked to an unfamiliar domain, and they are bombarded with pop-ups. For security analysts, Drmsoft represents a classic Pay-Per-Install (PPI) monetization scheme. It leverages deceptive installation tactics and aggressive persistence mechanisms to ensure the user cannot easily revert their browser settings.<br><br><b>Execution and Hijacking Mechanics</b><br>The infection typically begins when a user downloads the software from a freeware aggregator site (`T1189`). The setup wizard employs 'Dark Patterns'—pre-checked consent boxes hidden behind 'Advanced' menus (`T1204.002`). Upon execution, it installs malicious browser extensions (`T1176`) and frequently leverages Windows Group Policy (GPO) settings to lock the rogue extensions in place, preventing the user from removing them. It establishes persistence via Registry Run keys (`T1547.001`) and Scheduled Tasks to ensure the adware is reinstalled if deleted.<br><br><b>Indicators of Compromise & Impact</b><br>The primary impact is a severely degraded user experience, compromised browsing privacy (all searches are tracked and monetized), and wasted helpdesk resources. Incident responders will observe anomalous HTTP/HTTPS traffic to known ad-tracking networks. EDR logs will show the initial installer attempting to modify browser preference files (e.g., Chrome's `Preferences` JSON file) and establishing unauthorized Group Policies.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1562.001",
    "T1112",
    "T1189",
    "T1176"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1189",
      "name": "Drive-by Compromise (Bundled Installers)",
      "tactic": "Initial Access"
    },
    {
      "id": "T1176",
      "name": "Browser Extensions",
      "tactic": "Persistence"
    },
    {
      "id": "T1112",
      "name": "Modify Registry (Search Hijacking)",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1562.001",
      "name": "Impair Defenses: Disable or Modify Tools (GPO Abuse)",
      "tactic": "Defense Evasion"
    }
  ],
  "containment_steps": [
    "Use the Windows Control Panel to thoroughly uninstall the media converter software and any other programs installed on the same date.",
    "Audit Windows Group Policies and the Registry to remove any forced extension installation policies created by the adware.",
    "Deploy an enterprise adware removal tool (e.g., AdwCleaner) to locate and strip the deeply embedded registry hooks and watchdog services.",
    "Force a complete reset of all installed web browsers to factory defaults to eradicate the rogue extensions and restore the homepage."
  ],
  "what_to_avoid": [
    "Do not rely solely on the browser's 'remove extension' button; Drmsoft frequently uses GPOs and watchdog services to immediately reinstall itself.",
    "Avoid ignoring the infection; adware tracking data is highly detailed and may expose corporate activities or access to internal portals."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}