{
  "family": "nivdort",
  "sample_count": 6,
  "category": "trojan",
  "description": "<h3>Executive Summary</h3>\nNivdort (also widely tracked as Bayrob) is a highly sophisticated, modular Trojan and botnet client. Initially discovered around 2007 as a specialized tool for intercepting web traffic to steal credit card data and manipulate online auctions (like eBay), it evolved into a massive, multi-purpose botnet capable of spam distribution, credential theft, and cryptocurrency mining. The operators behind the core Bayrob botnet were arrested by the FBI in 2016, but variants of the malware occasionally resurface.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nNivdort/Bayrob was overwhelmingly distributed via massive, highly targeted spear-phishing campaigns. These emails frequently masqueraded as legitimate invoices or shipping documents from major couriers, containing malicious ZIP attachments that hid the executable payload.\n\nIts technical architecture was highly advanced for its time:\n<ul>\n<li><strong>Network Traffic Interception:</strong> Its signature capability was deep network interception. It installed malicious proxies or modified system routing to perform Man-in-the-Middle (MitM) attacks. This allowed it to modify web pages in real-time (e.g., changing the price of an item on eBay or stealing credit card data during checkout), even on HTTPS sites.</li>\n<li><strong>Polymorphism and Evasion:</strong> The botnet operators utilized advanced server-side polymorphism. Every single victim downloaded a unique, cryptographically distinct version of the malware executable, rendering traditional signature-based AV almost entirely useless at the time.</li>\n<li><strong>Modular Architecture:</strong> The botnet could be updated on the fly. The C2 server could push new modules to the infected host to turn it into a spam relay, a cryptocurrency miner, or a generic proxy node.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Nivdort detection indicates a severe compromise by a highly capable (historically APT-level) threat. The primary threat is financial fraud via intercepted web traffic and the theft of sensitive credentials.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Network Isolation and Triage:</strong> Isolate the endpoint immediately. Ensure that the C2 domains associated with the Nivdort variant are sinkholed at the corporate DNS level to prevent the bot from receiving new instructions.</li>\n<li><strong>Forensic Imaging:</strong> Because Nivdort heavily modifies network routing and installs custom proxies, a deep forensic analysis may be necessary to understand the full scope of the intercepted data.</li>\n<li><strong>Total Re-imaging:</strong> Attempting to manually remove Nivdort is strongly discouraged due to its deep hooks into the OS network stack. A complete bare-metal wipe and re-image is the only secure remediation method.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Nivdort",
    "Botnet.Bayrob",
    "Win32/Nivdort"
  ],
  "enrichment_level": "documented_reference_only",
  "faq": [
    {
      "@type": "Question",
      "name": "Where can I learn more about nivdort?",
      "acceptedAnswer": {
        "@type": "Answer",
        "text": "Refer to the linked MITRE ATT&CK technique pages, which document the behaviors associated with this family."
      }
    }
  ],
  "faq_count": 1,
  "mitre_attack": [
    "T1562",
    "T1185",
    "T1056.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-02T09:01:15Z",
  "type": "Trojan / Botnet",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}