{
  "family": "malmaker",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\n\"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.\n\n<h3>Technical Architecture and Capabilities</h3>\nMalmaker 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.\n\nKey features of a Malmaker utility include:\n<ul>\n<li><strong>Payload Customization:</strong> 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.</li>\n<li><strong>Built-in Obfuscation:</strong> 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.</li>\n<li><strong>Icon and Extension Spoofing:</strong> 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.</li>\n</ul>\n\n<h3>Threat Impact</h3>\nThe 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.\n\n<h3>Incident Response and Advanced Analysis</h3>\n<ul>\n<li><strong>Immediate Network Isolation:</strong> 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.</li>\n<li><strong>Forensic Code Extraction:</strong> 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.</li>\n<li><strong>Enterprise-Wide Sweeps:</strong> 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.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "HackTool.Malmaker",
    "Riskware.MalwareBuilder",
    "Trojan.Builder"
  ],
  "enrichment_level": "expert-seo",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Malmaker and what threat category does it belong to?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Malmaker 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 Malmaker establish persistence and evade defensive controls?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Malmaker 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 Malmaker compromise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Security teams responding to Malmaker 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 HackTool.Malmaker employ during execution?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "HackTool.Malmaker 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 HackTool.Malmaker, and what is the recommended recovery procedure?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Decryption availability for HackTool.Malmaker 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": [
    "T1587.001",
    "T1027",
    "T1566.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "type": "HackTool / Malware Builder",
  "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": "T1587.001",
      "name": "Develop Capabilities: Malware",
      "tactic": "Resource Development"
    },
    {
      "id": "T1027",
      "name": "Obfuscated Files or Information",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1566.001",
      "name": "Phishing: Spearphishing Attachment",
      "tactic": "Initial Access"
    }
  ],
  "containment_steps": [
    "Immediately isolate affected host(s) from the internal network (disconnect physical Ethernet and disable Wi-Fi/Bluetooth) to prevent Malmaker 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 Malmaker 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 Malmaker 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 Malmaker 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 Malmaker.",
    "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 Malmaker eradication is completely verified."
  ],
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows Server 2022",
    "Windows Server 2019"
  ]
}