{ "family": "vortex", "sample_count": 1, "category": "ransomware", "description": "

Executive Summary

\nVortex is a destructive family of Ransomware (closely related to or derived from the AES-NI ransomware family) designed to infiltrate Windows systems, rapidly encrypt valuable user data, and extort the victim for financial gain. First observed around 2017, Vortex targets both individual users and enterprises, utilizing strong cryptographic algorithms to deny access to critical files and cause significant operational downtime.\n\n

Infection Vector and Encryption Mechanics

\nVortex is most frequently distributed via malicious spam (malspam) campaigns containing weaponized attachments or via exploit kits (such as RIG EK) hosted on compromised websites.\n\nOnce executed, the ransomware initiates its encryption routine:\n\n\n

Threat Assessment

\nA Vortex infection is a critical security incident that directly impacts data availability and business continuity. While not as prevalent as modern RaaS threats, the underlying AES-NI based encryption is highly effective and difficult to crack without the key.\n\n

Remediation and Eradication

\n", "cta": "Published by the SystemHelpdesk team.", "aliases": [ "Trojan-Ransom.Win32.Vortex", "Ransom.AES-NI", "Win32/Vortex" ], "enrichment_level": "expert-seo", "faq": [ { "@type": "Question", "name": "What is Vortex and what threat category does it belong to?", "acceptedAnswer": { "@type": "Answer", "text": "Vortex 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 Vortex establish persistence and evade defensive controls?", "acceptedAnswer": { "@type": "Answer", "text": "Vortex 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 Vortex compromise?", "acceptedAnswer": { "@type": "Answer", "text": "Security teams responding to Vortex 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 Trojan-Ransom.Win32.Vortex employ during execution?", "acceptedAnswer": { "@type": "Answer", "text": "Trojan-Ransom.Win32.Vortex 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 Trojan-Ransom.Win32.Vortex, and what is the recommended recovery procedure?", "acceptedAnswer": { "@type": "Answer", "text": "Decryption availability for Trojan-Ransom.Win32.Vortex 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", "T1059" ], "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": "T1059", "name": "Command and Scripting Interpreter", "tactic": "Execution" } ], "containment_steps": [ "Immediately isolate affected host(s) from the internal network (disconnect physical Ethernet and disable Wi-Fi/Bluetooth) to prevent Vortex 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 Vortex 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 Vortex 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 Vortex 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 Vortex.", "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 Vortex eradication is completely verified." ], "target_platforms": [ "Windows 11", "Windows 10", "Windows Server 2022", "Windows Server 2019" ] }