{
  "family": "vmprotbad",
  "sample_count": 87,
  "category": "trojan",
  "description": "VMProtBad (cataloged across security vendors under detections including Trojan:Win32/VMProtBad, Trojan:Win32/VMProtect, and Win32/VMProtBad) is a heuristic threat signature identifying malicious Windows programs obfuscated, virtualized, and packed using the commercial VMProtect protection engine. While VMProtect is legitimately utilized by commercial software creators to safeguard intellectual property against reverse engineering and software piracy, cybercriminals heavily abuse the tool to shield trojans, information stealers, coin miners, and backdoors from static signature analysis and endpoint inspection. The packer transforms native x86/x64 assembly instructions into a proprietary virtualized bytecode instruction set executed by an embedded software interpreter, rendering conventional reverse engineering, string extraction, and decompilation ineffective. Malicious binaries detected under VMProtBad unpack their decrypted core modules directly into memory at runtime to initiate credential theft, host reconnaissance, and remote command-and-control beaconing.",
  "cta": "Published by the SystemHelpdesk Threat Intelligence Team.",
  "aliases": [
    "Trojan:Win32/VMProtBad",
    "Trojan:Win32/VMProtect",
    "Win32/VMProtBad"
  ],
  "enrichment_level": "curated_sourced",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Trojan:Win32/VMProtBad?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "VMProtBad is a detection signature identifying malware packed with the VMProtect code obfuscator to evade security detection."
      }
    },
    {
      "@type": "Question",
      "name": "Why do malware authors use VMProtect to pack their files?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "It converts native code into proprietary virtualized bytecode, preventing antivirus engines from reading the true payload."
      }
    },
    {
      "@type": "Question",
      "name": "Which malware families commonly use VMProtect packing?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Infostealers, cryptocurrency miners, remote access trojans (RATs), and game cheat loaders heavily abuse VMProtect."
      }
    },
    {
      "@type": "Question",
      "name": "How does VMProtBad behave upon execution?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "It runs anti-debugging checks, unpacks the hidden malicious code directly into memory, and initiates unauthorized tasks."
      }
    },
    {
      "@type": "Question",
      "name": "How can security software detect VMProtect-packed threats?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Through dynamic memory inspection, sandbox behavioral execution, and specialized unpacker heuristics."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1027.002",
    "T1059.003",
    "T1547.001",
    "T1140",
    "T1082",
    "T1071.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-15",
  "mitre_attack_detail": [
    {
      "id": "T1027.002",
      "name": "Obfuscated Files or Information: Software Packing",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1497.001",
      "name": "Virtualization/Sandbox Evasion: System Checks",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1620",
      "name": "Reflective Code Loading",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1055",
      "name": "Process Injection",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1129",
      "name": "Shared Modules",
      "tactic": "Execution"
    }
  ],
  "containment_steps": [
    "Isolate the endpoint immediately if the Vmprotbad executable was allowed to run; the highly obfuscated nature implies a severe, targeted payload.",
    "If the process is active, capture a live memory image (RAM dump) before rebooting to attempt extraction of the payload.",
    "Submit the packed binary to a specialized malware analyst for reverse engineering, noting that unpacking VMProtect is a highly specialized skill.",
    "Perform a full forensic sweep to determine how the highly obfuscated executable arrived on the endpoint."
  ],
  "what_to_avoid": [
    "Do not waste time trying to statically analyze the Vmprotbad executable on disk; the custom virtualization will yield zero actionable intelligence.",
    "Avoid assuming the threat was fully blocked simply because AV flagged the file; the payload may have already executed in memory."
  ],
  "target_industries": [
    "Healthcare",
    "Critical Infrastructure",
    "Enterprise"
  ],
  "motivation": "Evasion & Defense Impairment",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "defense_evasion",
    "impact"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "first_seen": 2013,
  "threat_actor": null,
  "delivery_mechanism": [
    "Pirated Software & Keygens",
    "Malicious Game Cheats / Mod Loaders",
    "Spearphishing Email Attachments"
  ],
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows 8.1",
    "Windows 7"
  ],
  "capabilities": [
    "Code Virtualization Obfuscation",
    "Anti-Debugging & Anti-Analysis",
    "In-Memory Payload Unpacking",
    "Credential Harvesting",
    "Secondary Payload Execution"
  ],
  "technical_analysis": {
    "file_types": [
      "Win32 PE Executable (VMProtect Packed)",
      "Dynamic Link Library (DLL)"
    ],
    "network_signatures": [
      "Encrypted C2 beaconing initiated by the unpacked memory-resident payload"
    ],
    "evasion_techniques": [
      "Instruction virtualization into custom bytecode",
      "Hardware breakpoint and hypervisor detection"
    ],
    "persistence_mechanisms": [
      "HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\VMProtBad",
      "Scheduled Task execution"
    ]
  },
  "impact": {
    "confidentiality": "High",
    "integrity": "High",
    "availability": "Medium",
    "scope": "Memory-resident code execution, reverse engineering impediment, credential theft"
  },
  "lineage": {
    "derived_from": [
      "Commercial VMProtect Packers"
    ],
    "variants": [
      "VMProtBad.A",
      "VMProtect.Heuristic"
    ]
  },
  "iocs": {
    "file_hashes": [
      "5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d",
      "0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d1e"
    ],
    "delivery": [
      "cheat_loader.exe",
      "vmprot_patch.exe"
    ],
    "persistence": [
      "HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run\\ProtectedStub",
      "%AppData%\\VMProt\\loader.exe"
    ]
  },
  "sources": [
    {
      "name": "Microsoft Defender Security Intelligence - Trojan:Win32/VMProtect",
      "url": "https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?Name=Trojan:Win32/VMProtect"
    },
    {
      "name": "Gridinsoft Threat Research - Understanding VMProtect Malware Packers",
      "url": "https://gridinsoft.com/blogs"
    }
  ]
}