Fire
Overview
Executive Summary
Fire (often detected generically as Virus.Win32.Fire or Trojan.Fire) represents an older class of malicious software that exhibits classic virus or worm-like behavior. While less common in modern, financially motivated ransomware attacks, "Fire" variants are primarily destructive or disruptive, designed to rapidly propagate across local networks and corrupt local file systems or disrupt system stability.Infection Vector and Technical Capabilities
The Fire family typically propagates through older, less secure methods, such as infecting executable files on removable media (USB drives), exploiting unpatched vulnerabilities in legacy SMB protocols (like older worms), or via malicious email attachments. Upon execution, Fire variants focus on disruption and propagation:- File Infection (Parasitic): True "virus" variants of Fire attempt to append their malicious code to legitimate executable files (`.exe`, `.scr`, `.dll`) on the local hard drive and mapped network shares. When the legitimate program is run, the virus code executes first.
- Destructive Payloads: Some older variants carry destructive payloads triggered on specific dates, which may involve overwriting sector data on the hard drive, corrupting critical system files, or continuously forcing the system to reboot.
- Network Propagation: Worm-like variants aggressively scan the local subnet for open, unauthenticated file shares or legacy vulnerabilities to copy themselves and execute laterally.
Threat Assessment
While largely mitigated by modern OS architecture and updated antivirus signatures, a localized outbreak of a Fire virus can cause significant operational disruption. The parasitic infection of legitimate executables can render critical business applications unusable, and network scanning can cause internal denial-of-service (DoS) conditions.Incident Response and Remediation
- Network Segmentation: Immediately isolate infected subnets to halt the worm-like lateral propagation and prevent the infection of mapped network drives.
- Specialized Antivirus Remediation: Unlike trojans, which can simply be deleted, parasitic viruses require specialized AV routines to "disinfect" the host files—stripping the malicious code while leaving the legitimate executable intact. If disinfection fails, the files must be restored from clean backups.
- Legacy Vulnerability Patching: Investigate how the malware propagated. The outbreak strongly indicates the presence of unpatched legacy systems or overly permissive internal file shares that must be immediately secured.
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: T1059 T1485 T1091
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_FIRE {
meta:
description = "Detects Fire (ransomware)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "fire" ascii wide nocase
$s2 = "virus.win32.fire" ascii wide nocase
$s3 = "worm.fire" ascii wide nocase
$s4 = "trojan.fire" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Fire Activity
id: 015f28b9df1bdd36427dd976fb73b29d
status: experimental
description: Detects generic indicators of the fire malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*fire*"
- "*virus.win32.fire*"
- "*worm.fire*"
- "*trojan.fire*"
condition: selection
level: mediumReferences & External Analysis
- Search "fire" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Fire Ransomware from Windows?
Manual removal of Fire 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 Fire a virus or a Ransomware?
Fire is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Fire typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Fire infection?
Symptoms of Fire 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 Fire and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Protection Guide.
Machine-readable
Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/fire.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.