{
  "family": "krakencryptor",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\nKraken Cryptor (KrakenCryptor) is a sophisticated Ransomware-as-a-Service (RaaS) operation that encrypts victim data and demands payment (typically in Bitcoin) for the decryption key. Notably, earlier versions of Kraken Cryptor were heavily promoted on the Dark Web and utilized the legitimate Sysinternals `SDelete` utility to securely overwrite backups and system recovery points, ensuring victims had no alternative but to pay the ransom.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nKraken Cryptor was historically distributed via large-scale malspam campaigns (using weaponized Word documents and macros) or deployed directly by affiliates who purchased access to compromised networks from Initial Access Brokers (often via RDP compromise).\n\nUpon execution, Kraken Cryptor performs a highly destructive attack sequence:\n<ul>\n<li><strong>Backup Eradication (SDelete):</strong> The ransomware frequently downloads and executes Microsoft's `SDelete` tool to securely overwrite free space and Volume Shadow Copies. This makes data recovery via standard undelete tools completely impossible.</li>\n<li><strong>Rapid Encryption:</strong> It scans local drives and network shares, encrypting files using strong cryptography (typically a combination of AES and RSA). Encrypted files are often appended with a random extension or a specific Kraken-related extension.</li>\n<li><strong>Evasion and Persistence:</strong> It attempts to terminate processes associated with database servers (SQL, Exchange) to ensure those files are unlocked and can be encrypted. It establishes persistence via the `Run` registry key to ensure the ransom note is continuously displayed.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Kraken Cryptor infection is a critical, tier-one security incident. The deliberate use of `SDelete` signifies a highly aggressive variant designed to maximize damage and force payment. It results in an immediate, catastrophic loss of data availability and severe operational disruption.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Immediate Network Severance:</strong> The absolute highest priority is to physically sever the infected endpoint (and any servers it can reach) from the network to halt the spread of the encryption across mapped drives and prevent data exfiltration.</li>\n<li><strong>DO NOT REBOOT:</strong> Do not reboot the infected machine. Rebooting can trigger \"wiper\" routines in some ransomware variants or clear volatile memory (RAM) that might contain the encryption key.</li>\n<li><strong>Restore from Offline Backups:</strong> Paying the ransom is strongly discouraged. Because the ransomware actively utilizes secure deletion tools, local backups are likely destroyed. Eradication requires a complete bare-metal wipe of the infected infrastructure and a full restoration from secure, offline (air-gapped) backups.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Ransom.Kraken",
    "Trojan-Ransom.Win32.Kraken",
    "Win32/Filecoder.Kraken"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1486",
    "T1485",
    "T1490"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-02T06:55:55Z",
  "type": "Ransomware",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}