Vortex
Overview
Executive Summary
Vortex 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.Infection Vector and Encryption Mechanics
Vortex is most frequently distributed via malicious spam (malspam) campaigns containing weaponized attachments or via exploit kits (such as RIG EK) hosted on compromised websites. Once executed, the ransomware initiates its encryption routine:- Data Encryption: The malware scans local drives and mapped network shares for a wide array of specific file extensions (documents, databases, images, archives). It utilizes robust AES-256 encryption.
- File Modification: Encrypted files are typically appended with the `.vortex` extension (or a related AES-NI variant extension).
- System Sabotage: Vortex actively attempts to delete Volume Shadow Copies (`vssadmin.exe Delete Shadows /All /Quiet`) to prevent easy recovery of the encrypted files via Windows System Restore.
- Extortion: It drops a ransom note (usually named `HOW_TO_DECRYPT_FILES.html` or similar) providing instructions for paying the ransom in Bitcoin via a Tor hidden service to obtain the decryption key.
Threat Assessment
A 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.Remediation and Eradication
- Immediate Network Isolation: The infected host must be immediately disconnected from the LAN to halt the encryption of mapped network shares and sever communication with the attacker's C2 infrastructure.
- Decryption Tools: Because Vortex is an older, AES-NI related family, the master decryption keys for several variants were eventually released. Do not pay the ransom. Organizations should check resources like the "No More Ransom" project or Kaspersky's RakhniDecryptor to see if a free decryptor is available for their specific variant.
- Restore from Backup: If a decryptor is unavailable, the most reliable recovery method is to wipe the infected system completely and restore data from a clean, offline backup.
Known aliases
Threat reports may refer to this family under multiple names:
MITRE ATT&CK Techniques
This family has been observed using the following ATT&CK techniques: T1486 T1490 T1059
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1059: Restrict execution of scripting languages such as PowerShell, VBScript, or Python to authorized administrators. Enforce Script Block Logging.
Generated Detections (Boilerplate)
These YARA and Sigma rules are auto-generated based on the family name and aliases. They must be heavily tuned before deployment in a production environment.
YARA Rule
rule MALWARE_WIN_VORTEX {
meta:
description = "Detects Vortex (ransomware)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "vortex" ascii wide nocase
$s2 = "trojan-ransom.win32.vortex" ascii wide nocase
$s3 = "ransom.aes-ni" ascii wide nocase
$s4 = "win32/vortex" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Vortex Activity
id: 5c19e1e0521f7b789a37a21c5cd5737b
status: experimental
description: Detects generic indicators of the vortex malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*vortex*"
- "*trojan-ransom.win32.vortex*"
- "*ransom.aes-ni*"
- "*win32/vortex*"
condition: selection
level: mediumReferences & External Analysis
- Search "vortex" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Vortex Ransomware from Windows?
Manual removal of Vortex is highly discouraged as it may leave persistence mechanisms intact. We recommend disconnecting the device from the internet and utilizing a professional incident response service or enterprise-grade EDR software to conduct a full forensic sweep.
Is Vortex a virus or a Ransomware?
Vortex is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Vortex typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Vortex infection?
Symptoms of Vortex can include unexpected system slowness, unauthorized outbound network traffic to unknown IP addresses, disabled security software, and suspicious background processes running from AppData or Temp directories.
Related Families (Category: ransomware)
Explore other malware families in the same category:
Protect Your Network Against Ransomwares
Want to prevent Vortex and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Protection Guide.
Machine-readable
Get this profile as JSON: https://jordanricky1604-ship-it.github.io/malware-families-catalog/api/vortex.json
Ecosystem & Interactive Environments
This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.