Malmaker
Overview
Executive Summary
"Malmaker" (often flagged as HackTool.Malmaker or Riskware.MalwareBuilder) is not a specific malware family, but a detection classification for software utilities explicitly designed to generate, compile, or obfuscate customized malware payloads. These "builders" are frequently sold on cybercrime forums (Malware-as-a-Service) and allow even unskilled attackers to rapidly generate sophisticated trojans, ransomware, or botnet agents tailored to evade specific antivirus signatures.Technical Architecture and Capabilities
Malmaker utilities act as the "compilers" of the cybercrime ecosystem. They provide a graphical user interface (GUI) or a command-line interface that allows an attacker to configure a malware payload before generating the final executable. Key features of a Malmaker utility include:- Payload Customization: The attacker can input their specific Command-and-Control (C2) IP address, configure persistence mechanisms (e.g., choose which registry key to modify), and select which features (like keylogging or screen capture) to enable in the generated trojan.
- Built-in Obfuscation: Advanced builders include crypters and packers. These algorithms encrypt the core malicious code, ensuring the generated executable has a unique cryptographic hash and bypasses static antivirus signatures.
- Icon and Extension Spoofing: The builder allows the attacker to disguise the final executable by applying the icon of a legitimate program (like MS Word or Adobe Reader) and utilizing techniques (like Right-to-Left Override) to spoof the file extension.
Threat Impact
The detection of a Malmaker utility on a corporate endpoint is a catastrophic security event. It definitively indicates that the compromised machine is being used by a threat actor (or a malicious insider) to actively develop and compile malware, likely to launch attacks against the internal network or to use the corporate infrastructure as a staging ground for external attacks.Incident Response and Advanced Analysis
- Immediate Network Isolation: Isolate the endpoint immediately. The presence of a builder implies the user has deep malicious intent or the machine is fully controlled by an external attacker.
- Forensic Code Extraction: Do not simply delete the builder. Forensic analysts must extract the configuration files associated with the Malmaker utility to understand what specific malware payloads were being generated and to identify the C2 infrastructure the attacker was configuring.
- Enterprise-Wide Sweeps: If a builder generated a custom trojan, that trojan was likely deployed within the environment. Use the IOCs extracted from the builder to perform a massive sweep of the entire network to locate the deployed payloads.
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: T1587.001 T1027 T1566.001
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1566.001: Scan email attachments for malicious macros, scripts, or suspicious archive files.
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_MALMAKER {
meta:
description = "Detects Malmaker (ransomware)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "malmaker" ascii wide nocase
$s2 = "hacktool.malmaker" ascii wide nocase
$s3 = "riskware.malwarebuilder" ascii wide nocase
$s4 = "trojan.builder" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Malmaker Activity
id: 0ca5ff0686164ca14f9efc7eaab484f2
status: experimental
description: Detects generic indicators of the malmaker malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*malmaker*"
- "*hacktool.malmaker*"
- "*riskware.malwarebuilder*"
- "*trojan.builder*"
condition: selection
level: mediumReferences & External Analysis
- Search "malmaker" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Malmaker Ransomware from Windows?
Manual removal of Malmaker 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 Malmaker a virus or a Ransomware?
Malmaker is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Malmaker typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Malmaker infection?
Symptoms of Malmaker 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 Malmaker 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/malmaker.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.