{
  "family": "spamha",
  "sample_count": 1,
  "category": "trojan",
  "description": "<h3>Executive Summary</h3>\nSpamha is a specialized Trojan and Spambot designed to hijack the network resources of infected Windows systems. Once deployed, it silently integrates the compromised machine into a larger botnet, utilizing the host's internet connection to blast out massive volumes of unsolicited junk mail, phishing lures, and malware-laden attachments to millions of email addresses globally.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nSpamha is typically distributed as a secondary payload, often downloaded by initial access trojans after a user opens a malicious email attachment or clicks a deceptive link.\n\nUpon execution, Spamha turns the infected machine into a dedicated spam proxy:\n<ul>\n<li><strong>SMTP Engine:</strong> The trojan contains its own miniature, built-in SMTP (Simple Mail Transfer Protocol) engine. This allows it to send emails directly to destination mail servers, bypassing the user's configured email client (like Outlook) and often bypassing local corporate mail relays.</li>\n<li><strong>C2 Communication and Templates:</strong> Spamha periodically connects to its command-and-control (C2) server to download target email lists and message templates. These templates often contain randomized text or dynamic macros to evade traditional bayesian spam filters.</li>\n<li><strong>Address Harvesting:</strong> To fuel its campaigns, the trojan frequently scans the local hard drive (specifically Windows Address Books, browser caches, and document files) for any strings resembling email addresses, transmitting these back to the botmaster.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nWhile a Spamha infection may not immediately destroy local data, it poses a severe operational and reputational risk to an organization. An infected host rapidly blasting out malware will quickly cause the enterprise's public IP addresses to be blacklisted by major spam clearinghouses (like Spamhaus or Barracuda), halting legitimate outbound corporate email communication.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Perimeter Blocking:</strong> Immediately block outbound SMTP traffic (TCP Port 25) at the perimeter firewall for all standard endpoints, forcing all email to route through approved, monitored corporate mail relays.</li>\n<li><strong>Network Isolation:</strong> Isolate the endpoint exhibiting high volumes of outbound SMTP connections to halt the spam campaign and prevent further IP blacklisting.</li>\n<li><strong>Reputation Remediation:</strong> After the malware has been removed and the endpoint secured, the IT department must actively petition major email blacklists to have the corporate IP addresses delisted, a process that can take several days.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Spambot.Spamha",
    "SpamTool.Spamha",
    "Win32/Spamha"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1059",
    "T1114.003",
    "T1583.003"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-01T17:15:09Z",
  "type": "Spambot / Trojan",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}