{
  "family": "fraudkrypt",
  "sample_count": 1,
  "category": "ransomware",
  "description": "Ransomware:Win32/Fraudkrypt is a malicious hybrid that blends the extortion tactics of Scareware with the destructive capability of Ransomware. Its primary objective is to frighten the user into paying a fee by locking the screen or encrypting a subset of files (`T1486`), often using a heavily customized, deceptive GUI that mimics law enforcement agencies or fake antivirus alerts (`T1491.002`).<br><br><b>Understanding Fraudkrypt (Scareware/Ransomware)</b><br>To an end-user, Fraudkrypt is terrifying. They are presented with a full-screen, uncloseable window claiming they have committed a crime or their computer is hopelessly corrupted, demanding immediate payment (often via pre-paid cards or Bitcoin) to 'unlock' the system. For an IT department, Fraudkrypt variants vary wildly in severity; some merely lock the screen (easily bypassed), while others actively encrypt data.<br><br><b>Execution and Extortion Mechanics</b><br>Fraudkrypt is typically delivered via exploit kits, malicious downloads, or spam. Upon execution, it immediately alters the Windows Registry (e.g., changing the `Shell` or `Userinit` keys in `Winlogon`) (`T1547.004`) to ensure its lock-screen launches immediately upon boot, before the user can access the desktop. It then either encrypts files or simply hides them (`T1564.001`), replacing the wallpaper with its extortion demand. It disables Task Manager and Registry Editor to prevent the user from terminating the process.<br><br><b>Indicators of Compromise & Impact</b><br>The impact ranges from severe user distress and downtime to actual data loss if encryption is used. Host-based IoCs include the highly visible, often poorly translated extortion screen, unauthorized modifications to `Winlogon` registry keys, and the presence of suspicious executables in `%AppData%` or `%Startup%`. Network IoCs include connections to payment processing portals or C2 servers.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Fraudkrypt and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Fraudkrypt 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 Fraudkrypt establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Fraudkrypt 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 Fraudkrypt compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Fraudkrypt 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 Fraudkrypt employ during execution?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Fraudkrypt 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 Fraudkrypt, and what is the recommended recovery procedure?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Decryption availability for Fraudkrypt 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": [
    "T1547.004",
    "T1486",
    "T1491.002"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1486",
      "name": "Data Encrypted for Impact (If the variant actually encrypts files)",
      "tactic": "Impact"
    },
    {
      "id": "T1491.002",
      "name": "Defacement: Internal Defacement (Displaying the fake law enforcement or scareware screen)",
      "tactic": "Impact"
    },
    {
      "id": "T1547.004",
      "name": "Boot or Logon Autostart Execution: Winlogon Helper DLL (Hijacking the boot process to display the lock screen)",
      "tactic": "Persistence"
    }
  ],
  "containment_steps": [
    "Attempt to boot the system into Safe Mode with Command Prompt; this often bypasses the Winlogon hooks Fraudkrypt uses to lock the screen.",
    "If it's merely a screenlocker (Scareware), use `regedit` in Safe Mode to restore the `HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\Shell` key back to `explorer.exe`.",
    "If data is encrypted, check 'No More Ransom' to see if a free decryptor exists for the specific Fraudkrypt variant.",
    "Run a full offline scan using a bootable AV rescue disk to remove the underlying malware executable."
  ],
  "what_to_avoid": [
    "Under no circumstances should you pay the fine or ransom; it funds criminal operations and there is no guarantee the system will be unlocked.",
    "Avoid reinstalling the OS immediately if data is encrypted; you may be able to recover the files if a decryptor becomes available later."
  ],
  "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"
  ]
}