{
  "family": "noupack",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\nNoupack is a malicious Trojan designed to covertly infiltrate Windows systems, establish persistence, and act as a reliable backdoor and downloader for remote threat actors. The name \"Noupack\" often refers specifically to the custom, proprietary packing/obfuscation techniques used by the malware authors to hide the core payload from static antivirus detection.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nNoupack is predominantly distributed through socially engineered spam campaigns containing malicious attachments (often weaponized PDFs or Office documents) or via compromised software installers downloaded from untrustworthy web portals.\n\nUpon successful execution, Noupack operates with a focus on stealth and payload delivery:\n<ul>\n<li><strong>De-obfuscation and Execution:</strong> The initial Noupack executable is heavily packed. Upon execution in memory, it unpacks itself to reveal the true malicious payload, effectively bypassing traditional, signature-based antivirus scanning that only inspects the file on disk.</li>\n<li><strong>Persistence:</strong> Noupack ensures it survives system reboots by modifying the Windows Registry (e.g., adding entries to the `Run` or `RunOnce` keys) or by creating hidden Scheduled Tasks.</li>\n<li><strong>Payload Delivery:</strong> Acting as a downloader, Noupack receives instructions from a command-and-control (C2) server to silently download and execute secondary malware. This frequently includes info-stealers (to harvest credentials), botnet agents, or enterprise ransomware.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Noupack infection represents a significant breach of the endpoint perimeter. Because it provides remote attackers with the ability to execute arbitrary code, a single compromised machine can rapidly be utilized to pivot laterally and compromise the entire corporate network.\n\n<h3>Remediation and Eradication</h3>\n<ul>\n<li><strong>Endpoint Detection and Response (EDR):</strong> Static scanning is often ineffective against packed malware. Configure EDR solutions to monitor for anomalous registry modifications, unauthorized outbound network connections, and in-memory execution anomalies.</li>\n<li><strong>Network Isolation and Sweeps:</strong> Immediately isolate the infected endpoint. Conduct a thorough forensic sweep to identify not only the Noupack executable but also any secondary payloads it may have successfully deployed.</li>\n<li><strong>Credential Reset:</strong> Because Noupack often facilitates the deployment of info-stealers, all user credentials associated with the compromised endpoint must be treated as compromised and immediately reset.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Noupack",
    "Packed.Noupack",
    "Win32/Noupack"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1027.002",
    "T1105",
    "T1547.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-01T16:39:01Z",
  "type": "Trojan",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}