{
  "family": "shezkrypt",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\nShezkrypt is a destructive ransomware and cryptor family designed to extort financial payment from victims by irreparably encrypting their personal and corporate data. It targets Windows operating systems and is frequently deployed as the final payload in targeted, human-operated ransomware campaigns, following successful network penetration and lateral movement.\n\n<h3>Infection Vector and Technical Operations</h3>\nShezkrypt typically gains entry into a network via compromised Remote Desktop Protocol (RDP) endpoints, exploitation of internet-facing vulnerabilities (e.g., in unpatched VPN appliances), or through initial access brokers (IABs) who sell compromised credentials.\n\nOnce executed with administrative privileges, Shezkrypt's operational flow includes:\n<ul>\n<li><strong>Defense Impairment:</strong> It actively searches for and terminates processes associated with endpoint detection and response (EDR) agents, antivirus software, and database management systems (to unlock database files for encryption).</li>\n<li><strong>Shadow Copy Destruction:</strong> Utilizing Windows Management Instrumentation (WMI) or native command-line tools (`vssadmin`), Shezkrypt deletes all Volume Shadow Copies and disables Windows Recovery Environment (WinRE) to thwart recovery efforts.</li>\n<li><strong>Data Encryption:</strong> The malware utilizes a robust hybrid encryption scheme (typically AES for files, with the AES keys encrypted by an embedded RSA public key). Encrypted files are appended with a Shezkrypt-specific extension.</li>\n</ul>\n\n<h3>Security and Operational Impact</h3>\nA Shezkrypt infection results in a critical loss of data availability. The encryption algorithms utilized are generally considered unbreakable without the attacker's corresponding private RSA key. This leads to massive operational downtime, financial loss, and potential regulatory fines for data breaches.\n\n<h3>Resilience and Incident Response</h3>\n<ul>\n<li><strong>Air-Gapped Backups:</strong> Implement the 3-2-1 backup strategy. Ensure that critical data backups are completely isolated (air-gapped) from the production network to prevent the ransomware from encrypting the backup repositories.</li>\n<li><strong>RDP Hardening:</strong> Never expose RDP (Port 3389) to the public internet. Mandate the use of a secure VPN and Multi-Factor Authentication (MFA) for all remote administrative access.</li>\n<li><strong>Network Segmentation:</strong> Isolate critical servers and databases onto separate VLANs with strict firewall rules to impede the lateral movement of ransomware across the enterprise.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Ransomware.Shezkrypt",
    "Trojan-Ransom.Shezkrypt",
    "Win32/Shezkrypt"
  ],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Shezkrypt and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Shezkrypt 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 Shezkrypt establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Shezkrypt 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 Shezkrypt compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Shezkrypt 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 Ransomware.Shezkrypt employ during execution?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Ransomware.Shezkrypt 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 Ransomware.Shezkrypt, and what is the recommended recovery procedure?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Decryption availability for Ransomware.Shezkrypt 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": [
    "T1486",
    "T1490",
    "T1078",
    "T1562.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "type": "Ransomware",
  "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,
  "mitre_attack_detail": [
    {
      "id": "T1486",
      "name": "Data Encrypted for Impact",
      "tactic": "Impact"
    },
    {
      "id": "T1490",
      "name": "Inhibit System Recovery (Behaviorally blocking the deletion of backups)",
      "tactic": "Impact"
    },
    {
      "id": "T1078",
      "name": "Valid Accounts (The goal of the attack)",
      "tactic": "Initial Access"
    },
    {
      "id": "T1562.001",
      "name": "Impair Defenses: Disable or Modify Tools",
      "tactic": "Defense Evasion"
    }
  ],
  "containment_steps": [
    "Immediately isolate affected host(s) from the internal network (disconnect physical Ethernet and disable Wi-Fi/Bluetooth) to prevent Shezkrypt from spreading laterally or encrypting network-attached storage (NAS) and shared SMB volumes.",
    "Preserve volatile system memory (RAM capture) on a representative endpoint before attempting a reboot or power-down, as Shezkrypt symmetric encryption keys or uncompiled payload components may still reside in memory.",
    "Audit process execution logs and terminate active scripting interpreters (e.g. PowerShell, CMD, WScript) or commands executing 'vssadmin.exe delete shadows' or 'wbadmin' used by Shezkrypt to inhibit recovery.",
    "Investigate the initial compromise vector (such as exposed RDP instances, spearphishing attachments, or vulnerable edge gateways) and enforce an immediate credential reset for all compromised Active Directory accounts.",
    "Restore critical assets and databases exclusively from verified, air-gapped, or immutable offline backups once the Shezkrypt binary and related persistence hooks are eradicated."
  ],
  "what_to_avoid": [
    "Do not restart or power cycle infected systems prematurely; doing so destroys volatile RAM encryption keys and may trigger bootloader locking logic embedded in Shezkrypt.",
    "Avoid negotiating or paying the extortion demand without prior forensic evaluation and consultation with incident response specialists, as payment does not guarantee data recovery.",
    "Do not connect clean backup drives or external storage to the affected network until Shezkrypt eradication is completely verified."
  ],
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows Server 2022",
    "Windows Server 2019"
  ]
}