Ransomheur

Category: ransomware · Aliases: Generic.Ransom.Heur, Heur:Trojan-Ransom, Suspicious.Ransomware · Sample count (EMBER 2018): 1 · Enrichment: insufficient_information · Updated: 2026-07-01T16:46:31Z

Category: RansomwareActor: Unknown / CybercriminalIndustry: Global / OpportunisticMotivation: Opportunistic

Overview

Executive Summary

"RansomHeur" (short for Ransomware Heuristic) is a highly critical, generic detection signature utilized by advanced Endpoint Protection Platforms (EPP) and EDR solutions. It does not identify a specific, named ransomware family (like LockBit or Ryuk). Instead, it indicates that the security engine has actively observed a process executing behavioral patterns that are definitively characteristic of a ransomware attack in progress.

Heuristic Detection and Behavioral Context

Unlike static signatures that look for known file hashes, a RansomHeur alert fires based on real-time behavioral analysis. A process flagged with this identifier has typically triggered a combination of the following rules:

Mass File Modification: The process is rapidly opening, encrypting, and renaming a large volume of user files (e.g., documents, images, databases) across local disks or mapped network shares in a very short timeframe.
Volume Shadow Copy Deletion: The process has attempted to execute administrative commands (like `vssadmin.exe Delete Shadows /All /Quiet` or WMI equivalents) to destroy local system backups and prevent easy file restoration.
Cryptographic API Abuse: The process is making anomalous, high-frequency calls to Windows cryptographic APIs (e.g., CryptoAPI, CNG) outside of normal application behavior.

Threat Impact and Response

A RansomHeur alert is a "break-glass," severity-critical incident. It means active data destruction is occurring on the endpoint. However, if the EDR is configured correctly, the process may have been successfully terminated mid-encryption, limiting the damage.

Immediate Containment Strategy

Total Network Isolation: Immediately and physically sever the affected machine's network connection (unplug Ethernet, disable Wi-Fi) to halt the encryption of mapped network drives and lateral spread.
Do Not Reboot: Do not reboot the machine, as this may trigger secondary payloads, delete forensic evidence in RAM (which might contain the encryption key), or accelerate the encryption routine upon startup.
Determine Blast Radius: Identify exactly which files were encrypted before the process was killed. Extract the malicious binary that triggered the alert for sandbox analysis to identify the true ransomware family and locate the attacker's entry point (e.g., compromised RDP, phishing email).

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 T1012

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_RANSOMHEUR {
    meta:
        description = "Detects Ransomheur (ransomware)"
        author = "SystemHelpdesk Boilerplate Generator"
        date = "2026-07-06"
    strings:
        $s1 = "ransomheur" ascii wide nocase
        $s2 = "generic.ransom.heur" ascii wide nocase
        $s3 = "heur:trojan-ransom" ascii wide nocase
        $s4 = "suspicious.ransomware" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

Sigma Rule

title: Suspicious Ransomheur Activity
id: f9ae23548ec4ad648feaad2157a44257
status: experimental
description: Detects generic indicators of the ransomheur malware family.
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
        CommandLine|contains:
            - "*ransomheur*"
            - "*generic.ransom.heur*"
            - "*heur:trojan-ransom*"
            - "*suspicious.ransomware*"
    condition: selection
level: medium

References & External Analysis

Search "ransomheur" on VirusTotal (External Analysis)

Frequently Asked Questions

How do I remove the Ransomheur Ransomware from Windows?

Manual removal of Ransomheur 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 Ransomheur a virus or a Ransomware?

Ransomheur is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Ransomheur typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.

What are the main symptoms of a Ransomheur infection?

Symptoms of Ransomheur 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 Ransomheur and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Protection Guide.

Need help with an active incident? Published by the SystemHelpdesk team.

Machine-readable

Get this profile as JSON: https://jordanricky1604-ship-it.github.io/malware-families-catalog/api/ransomheur.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.