{
  "family": "emudbot",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\nEmudbot is a persistent trojan designed to recruit infected endpoints into a distributed botnet architecture. Once a machine is compromised, it becomes a \"zombie\" or \"bot,\" silently awaiting commands from a centralized or peer-to-peer (P2P) command-and-control (C2) network controlled by a botmaster.\n\n<h3>Infection Chain and Botnet Operations</h3>\nEmudbot spreads through a variety of vectors, including exploit kits hosted on compromised websites, malicious email attachments, and lateral movement via unpatched network vulnerabilities (such as SMB exploits). \n\nUpon execution, Emudbot immediately secures persistence by modifying registry run keys and creating hidden scheduled tasks. It then reaches out to its designated C2 infrastructure. The botnet architecture allows the botmaster to issue commands to thousands of infected machines simultaneously. Emudbot is highly modular and is typically instructed to perform the following illicit activities:\n<ul>\n<li><strong>Distributed Denial of Service (DDoS):</strong> Participating in massive, coordinated volumetric or application-layer attacks against target websites or infrastructure.</li>\n<li><strong>Spam Distribution:</strong> Utilizing the infected host's resources to send out millions of phishing or malspam emails.</li>\n<li><strong>Secondary Payload Delivery:</strong> Acting as a downloader to install ransomware, crypto-miners, or credential stealers onto the compromised network.</li>\n</ul>\n\n<h3>Threat Impact</h3>\nAn Emudbot infection degrades network performance due to the constant C2 polling and potential participation in DDoS attacks. More importantly, it acts as an open backdoor into the enterprise environment, allowing threat actors persistent access to deploy subsequent, more devastating attacks.\n\n<h3>Mitigation and Eradication Strategies</h3>\n<ul>\n<li><strong>Network Segmentation:</strong> Implement strict network segmentation to limit the ability of the botnet to propagate laterally across the enterprise.</li>\n<li><strong>Traffic Analysis:</strong> Monitor edge firewalls and intrusion detection systems (IDS) for anomalous outbound traffic patterns, such as IRC (Internet Relay Chat) protocols or unusual HTTP POST requests typical of botnet C2 communications.</li>\n<li><strong>Vulnerability Management:</strong> Maintain a rigorous patching schedule for operating systems and third-party applications to close the vulnerabilities that exploit kits rely on for initial infection.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Botnet.Emudbot",
    "Trojan.Emudbot",
    "Win32/Emudbot"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1059",
    "T1105",
    "T1498"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-01T16:03:45Z",
  "type": "Botnet",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}