{
  "family": "aspxor",
  "sample_count": 9,
  "category": "trojan",
  "description": "Aspxor (classified in antivirus detection telemetry under designations including Trojan:Win32/Aspxor, Trojan.Win32.Aspxor, and Win32/Aspxor) is a multi-stage trojan engineered to disguise itself as legitimate software, execute unauthorized commands, and coordinate with external command-and-control infrastructure. Disseminated across enterprise networks and consumer workstations via social engineering, phishing attachments, malicious drive-by downloads, or weaponized software cracks, Aspxor executes an initial reconnaissance phase upon system ingress. The binary evaluates host privileges, detects active hypervisors and sandbox environments to evade behavioral analysis, and establishes resilient autostart persistence by configuring registry keys under HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run or registering background Windows services. Operational mechanics characteristic of this family include deceptive executable masquerading, registry run key autostart, system telemetry gathering, and remote C2 beaconing. Outbound communication is established with remote threat actor infrastructure to beacon operational status and receive tasking, posing significant security risks to data integrity and host availability.",
  "cta": "Published by the SystemHelpdesk Threat Intelligence Team.",
  "aliases": [
    "Trojan:Win32/Aspxor",
    "Trojan.Win32.Aspxor",
    "Win32/Aspxor"
  ],
  "enrichment_level": "curated_sourced",
  "faq": [
    {
      "@type": "Question",
      "name": "What is Trojan:Win32/Aspxor?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Aspxor is a trojan threat designed to infiltrate Windows systems and execute unauthorized operations without user consent."
      }
    },
    {
      "@type": "Question",
      "name": "How does Aspxor compromise target systems?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "It commonly infiltrates systems via phishing emails, trojanized software installers, exploit kits, or unpatched vulnerabilities."
      }
    },
    {
      "@type": "Question",
      "name": "What persistence mechanisms does Aspxor utilize?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "It typically creates autostart entries in the Windows Registry (HKCU/HKLM Run keys), registers scheduled tasks, or installs hidden background services."
      }
    },
    {
      "@type": "Question",
      "name": "What risks does Aspxor pose to an enterprise?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "It can lead to credential theft, system manipulation, unauthorized remote access, data loss, or secondary malware delivery."
      }
    },
    {
      "@type": "Question",
      "name": "How can administrators detect and eliminate Aspxor?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Deploy modern EDR solutions with updated behavioral signatures, isolate infected endpoints, audit autostart persistence entries, and conduct full antimalware scans."
      }
    }
  ],
  "faq_count": 5,
  "mitre_attack": [
    "T1059.003",
    "T1027",
    "T1547.001",
    "T1071.001",
    "T1105"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-10-16",
  "mitre_attack_detail": [
    {
      "id": "T1498",
      "name": "Network Denial of Service (Massive SMTP spam generation)",
      "tactic": "Impact"
    },
    {
      "id": "T1014",
      "name": "Rootkit (Hiding files and processes)",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1071.001",
      "name": "Application Layer Protocol: Web Protocols (C2 Communication)",
      "tactic": "Command and Control"
    },
    {
      "id": "T1547.001",
      "name": "Boot or Logon Autostart Execution: Registry Run Keys",
      "tactic": "Persistence"
    }
  ],
  "containment_steps": [
    "Immediately block outbound TCP Port 25 (SMTP) at the firewall for all standard user workstations to halt the spam blast and protect the corporate IP reputation.",
    "Isolate the endpoint to sever the C2 connection and prevent it from downloading further spam templates or secondary payloads.",
    "Due to the advanced rootkit capabilities, do not rely on standard antivirus removal; perform a bare-metal wipe and reimage of the infected machine.",
    "Monitor public spam blacklists (e.g., MXToolbox) to ensure the corporate IP address has not been blacklisted, and initiate delisting procedures if necessary."
  ],
  "what_to_avoid": [
    "Do not assume the endpoint is clean just because a standard antivirus scan comes back negative; Aspxor's rootkit hides its presence from user-mode APIs.",
    "Avoid ignoring the incident; allowing a spambot to operate will quickly result in the company's legitimate emails being rejected by clients and partners."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ],
  "attack_stage": [
    "execution",
    "persistence"
  ],
  "ecosystem": [
    "windows_pe"
  ],
  "is_emerging": false,
  "sources": [
    {
      "name": "Microsoft Defender Threat Encyclopedia - Trojan:Win32/Aspxor",
      "url": "https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?Name=Trojan:Win32/Aspxor"
    },
    {
      "name": "Kaspersky Threat Intelligence - Trojan.Win32.Aspxor",
      "url": "https://threats.kaspersky.com/en/threat/"
    },
    {
      "name": "MITRE ATT&CK - Enterprise Techniques",
      "url": "https://attack.mitre.org/techniques/T1059.003/"
    }
  ],
  "target_platforms": [
    "Windows 11",
    "Windows 10",
    "Windows 7"
  ]
}