{
  "family": "blokrypt",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\nBlokrypt is a malicious Ransomware family designed to extort financial payment from victims by encrypting their critical data. Unlike more sophisticated \"Ransomware-as-a-Service\" (RaaS) operations that carefully exfiltrate data for double-extortion, Blokrypt is often deployed rapidly, prioritizing immediate, widespread encryption of local and network-mapped drives to cause maximum operational disruption.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nBlokrypt is typically distributed via weaponized email attachments (spear-phishing) or deployed by threat actors who have purchased RDP credentials from Initial Access Brokers (IABs).\n\nUpon execution, Blokrypt initiates a standard but devastating attack sequence:\n<ul>\n<li><strong>Volume Shadow Copy Deletion:</strong> Before encryption begins, the ransomware executes commands (e.g., `vssadmin.exe Delete Shadows /All /Quiet`) to destroy local system backups and recovery points, ensuring the victim cannot easily restore their files.</li>\n<li><strong>Strong Cryptography:</strong> It utilizes strong encryption algorithms (such as AES combined with an RSA public key) to encrypt documents, databases, images, and archives. The encrypted files are usually appended with a specific, unique extension.</li>\n<li><strong>Ransom Note Generation:</strong> A text or HTML file is dropped in every directory containing encrypted files. This note provides instructions on how to purchase cryptocurrency (usually Bitcoin) and contact the attackers to obtain the decryption key.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Blokrypt infection is a critical security incident resulting in immediate and often catastrophic loss of data availability. The destruction of local backups means that without secure, offline backups, organizations face a stark choice between massive data loss or paying a criminal extortion demand.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Immediate Network Severance:</strong> The infected endpoint must be immediately disconnected from the corporate network, Wi-Fi, and any VPNs to prevent the ransomware from propagating to mapped network drives and cloud storage sync folders.</li>\n<li><strong>Preserve Memory (Do Not Reboot):</strong> If possible, capture a forensic image of the system's RAM before powering it down, as the decryption key might temporarily reside in volatile memory.</li>\n<li><strong>Eradication and Restoration:</strong> Paying the ransom is strongly discouraged. The only reliable remediation strategy is a complete bare-metal wipe of the infected systems and a full restoration from secure, air-gapped backups.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Ransom.Blokrypt",
    "Win32/Filecoder.Blokrypt",
    "Trojan-Ransom.Win32.Blokrypt"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1486",
    "T1490"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-02T06:59:32Z",
  "type": "Ransomware",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}