{
  "family": "evrial",
  "sample_count": 9,
  "category": "ransomware",
  "description": "TrojanSpy:Win32/Evrial is a specialized, highly aggressive Information Stealer that gained prominence for its intense focus on cryptocurrency theft. While it performs standard infostealer duties (grabbing browser cookies and passwords), Evrial is infamous for its 'Clipboard Hijacking' capability, actively monitoring the Windows clipboard and instantly swapping the victim's copied cryptocurrency wallet address with an address controlled by the attacker.<br><br><b>Understanding the Evrial Stealer</b><br>To the victim, the theft occurs in a split second. They copy a Bitcoin address to send a payment, paste it into their wallet application, and hit send, not realizing the address changed between the 'copy' and the 'paste'. For security analysts, Evrial represents a highly targeted, financially motivated threat. It doesn't need to deploy ransomware; it steals funds directly and irrevocably from the endpoint.<br><br><b>Execution and Clipboard Hijacking Mechanics</b><br>Evrial is typically distributed via cracked software, fake game cheats, or malicious forum links (`T1204.002`). Upon execution, it establishes persistence via Registry Run keys (`T1547.001`). It performs a rapid smash-and-grab of the system, targeting browser credential stores (`T1555.003`), FTP clients, and desktop cryptocurrency wallet files (like `wallet.dat`) (`T1005`). Crucially, it registers a listener on the Windows Clipboard API (`T1115`). It uses Regular Expressions (Regex) to constantly scan clipboard data for strings that match the format of Bitcoin, Ethereum, Monero, or Litecoin addresses. If a match is found, Evrial instantly replaces the clipboard contents with the attacker's corresponding wallet address. All stolen data is zipped and exfiltrated to a C2 server via HTTP POST requests (`T1041`).<br><br><b>Indicators of Compromise & Impact</b><br>The primary impact is the direct, unrecoverable theft of cryptocurrency and compromised online accounts. The most glaring IoC is the user reporting that their copied crypto address mysteriously changed when pasted. Network logs will show a sudden burst of outbound HTTP POST traffic (often containing a `.zip` file) immediately after the malware is executed. EDR logs will flag anomalous access to the `AppData\\Roaming\\Bitcoin` (or similar wallet directories) and the rapid querying of browser `Login Data` SQLite databases.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Evrial and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Evrial is classified as a Ransomware. 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 Evrial establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Evrial 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 Evrial compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Evrial 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 cryptographic algorithms and file targeting techniques does Evrial employ during execution?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Evrial typically leverages hybrid cryptographic architectures combining symmetric stream or block ciphers (such as AES-256 or ChaCha20) for rapid file encryption with asymmetric algorithms (such as RSA-2048 or Curve25519) to securely protect the session keys. It aggressively targets sensitive file extensions including corporate documents, databases, virtual disks, and backups while systematically executing commands to delete Volume Shadow Copies (vssadmin delete shadows /all /quiet) and disable system recovery options."
      }
    },
    {
      "@type": "Question",
      "name": "Are decryptors available for Evrial, and what is the recommended recovery procedure?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Decryption availability for Evrial depends on whether security researchers or law enforcement (such as the No More Ransom initiative) have recovered the master private keys or discovered flaws in its key generation routines. Victims should never pay the extortion demand, as payment fuels criminal operations without guaranteeing file restoration. The recommended recovery procedure entails isolating infected hosts, conducting forensic disk imaging, identifying the root access vector, and restoring validated systems from immutable offline backups."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1115",
    "T1555.003",
    "T1005",
    "T1041"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1115",
      "name": "Clipboard Data (Actively hijacking and modifying copied data)",
      "tactic": "Collection"
    },
    {
      "id": "T1555.003",
      "name": "Credentials from Password Stores: Credentials from Web Browsers",
      "tactic": "Credential Access"
    },
    {
      "id": "T1005",
      "name": "Data from Local System (Stealing wallet.dat files)",
      "tactic": "Collection"
    },
    {
      "id": "T1041",
      "name": "Exfiltration Over C2 Channel",
      "tactic": "Exfiltration"
    }
  ],
  "containment_steps": [
    "Isolate the endpoint to halt the exfiltration of the stolen credential archives and wallet files.",
    "Assume all passwords stored in the victim's browsers, as well as any cryptocurrency wallets stored on the machine, are fully compromised. Enforce immediate password resets.",
    "Use EDR to locate the Evrial executable (often hidden in `%AppData%`) and remove its associated Registry Run keys.",
    "Block the identified C2 domains or IP addresses at the enterprise firewall."
  ],
  "what_to_avoid": [
    "Do not assume a password change is sufficient if the attacker stole active session cookies; ensure all active web sessions are forcefully terminated.",
    "Avoid ignoring the clipboard hijacking aspect; educate the user to manually verify the first and last 4 characters of any crypto address they paste."
  ],
  "target_industries": [
    "Healthcare",
    "Critical Infrastructure",
    "Enterprise"
  ],
  "motivation": "Financial Extortion",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "defense_evasion",
    "impact"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows Server 2022",
    "Windows Server 2019"
  ]
}