{
  "family": "epicscale",
  "sample_count": 2,
  "category": "advanced_threat",
  "description": "Adware:Win32/Epicscale is a Potentially Unwanted Program (PUP) that operates as a covert cryptocurrency miner. While it originally presented itself as a platform that used 'idle processing power' for charitable causes, it is widely classified as adware/riskware due to its deceptive installation practices (often bundled with other software without clear consent) and the severe impact it has on system performance.<br><br><b>Understanding Epicscale (Cryptojacking)</b><br>To an end-user, an Epicscale infection manifests as severe system sluggishness. Fans may run at maximum speed, laptops will overheat, and battery life will plummet, even when the computer is ostensibly idle. For a security administrator, Epicscale is a form of Resource Hijacking (`T1496`). It steals the organization's hardware resources and electricity to mine cryptocurrency (like Bitcoin or Monero) for the software developers.<br><br><b>Execution and Hijacking Mechanics</b><br>Epicscale is typically distributed via software bundles (`T1189`). When a user downloads a free utility (like uTorrent, which notoriously bundled Epicscale in 2015), Epicscale installs silently in the background. It establishes persistence via the Registry Run keys or Scheduled Tasks (`T1547.001`) to ensure it launches automatically. Once running, it utilizes the CPU and sometimes the GPU to perform complex cryptographic hashing, communicating with external mining pools (`T1105`) to submit completed 'shares' and receive new workloads.<br><br><b>Indicators of Compromise & Impact</b><br>The primary impact is severe performance degradation and potential hardware damage due to overheating. Host-based IoCs include prolonged, 100% CPU utilization by unknown or unexpected processes (often disguised with generic names). The presence of the Epicscale application in `C:\\Program Files` or `%AppData%` is a definitive indicator. Network IoCs include constant, low-bandwidth outbound traffic (often TCP over non-standard ports like 3333 or 14444) communicating with known cryptocurrency mining pools (e.g., Stratum protocol).",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Epicscale and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Epicscale is classified as a Advanced Threat. Documented across security telemetry, it is engineered to execute unauthorized operations, establish persistent footholds on target endpoints, and facilitate malicious campaigns targeting enterprise and individual environments."
      }
    },
    {
      "@type": "Question",
      "name": "How does Epicscale establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Epicscale typically establishes persistence through registry run keys, scheduled tasks, or service installations, while evading signature-based antivirus solutions through code obfuscation, memory injection, or anti-analysis sandbox checks."
      }
    },
    {
      "@type": "Question",
      "name": "What are the essential incident response steps for mitigating a Epicscale compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Epicscale should immediately isolate affected endpoints from the network, perform memory triage to capture volatile forensic artifacts, audit registry and startup persistence mechanisms, revoke exposed user credentials, and restore systems from verified, clean backups."
      }
    },
    {
      "@type": "Question",
      "name": "What lateral movement and credential access tactics does Epicscale leverage in enterprise intrusions?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Epicscale frequently utilizes privileged account harvesting techniques such as LSASS memory dumping, Kerberoasting, and token impersonation to escalate privileges. Once administrative credentials are acquired, it pivots across the victim network utilizing living-off-the-land binaries (LOLBins) such as WMI, PowerShell remoting, and PsExec, or abuses remote desktop protocols (RDP) to reach critical internal repositories and domain controllers."
      }
    },
    {
      "@type": "Question",
      "name": "How does Epicscale maintain covert communications and evade perimeter network monitoring?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Epicscale often relies on multi-stage command and control (C2) architectures utilizing encrypted protocols over standard web ports (HTTPS/443 or DNS tunneling) to blend in with legitimate enterprise network traffic. Many variants incorporate proxy networks, domain fronting, or cloud services (such as Microsoft Graph API, Google Drive, or Telegram) to masquerade C2 channels, bypassing traditional signature-based egress filtering."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1547.001",
    "T1189",
    "T1496"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1496",
      "name": "Resource Hijacking (Cryptocurrency Mining)",
      "tactic": "Impact"
    },
    {
      "id": "T1547.001",
      "name": "Boot or Logon Autostart Execution",
      "tactic": "Persistence"
    },
    {
      "id": "T1189",
      "name": "Drive-by Compromise (Software Bundling)",
      "tactic": "Initial Access"
    }
  ],
  "containment_steps": [
    "Use the Windows Task Manager or EDR tools to identify the process consuming excessive CPU resources and terminate it immediately.",
    "Use the Windows Control Panel to thoroughly uninstall the 'Epicscale' application and the parent program that bundled it.",
    "Run a full scan with a reputable antimalware tool to ensure all associated scheduled tasks and hidden mining components are removed.",
    "Update network firewall rules to block outbound traffic to known cryptocurrency mining pools (Stratum protocol)."
  ],
  "what_to_avoid": [
    "Do not ignore complaints of slow or overheating computers; it is often the first indicator of a cryptojacking infection.",
    "Avoid allowing users to download unverified freeware or torrent clients, as these are the primary distribution vectors for bundled miners."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "execution",
    "persistence"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows Server 2022",
    "Windows Server 2019"
  ]
}