{
  "family": "smheist",
  "sample_count": 1,
  "category": "backdoor",
  "description": "<h3>Executive Summary</h3>\nSmheist is a highly specialized Information Stealer (Info-Stealer) specifically designed to target and extract credentials, session tokens, and financial data related to online banking and e-commerce platforms. The \"heist\" nomenclature indicates its primary objective: the rapid, silent exfiltration of high-value authentication data necessary for threat actors to execute fraudulent financial transactions or account takeovers.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nSmheist is typically distributed via highly targeted spear-phishing campaigns (often masquerading as urgent banking alerts or invoices) or dropped as a secondary payload by an initial access broker.\n\nUpon execution, it performs a rapid, aggressive data harvesting operation:\n<ul>\n<li><strong>Browser Exfiltration and Web Injection:</strong> Smheist targets Chromium and Gecko-based browsers to extract saved passwords and autofill data. Advanced variants may utilize \"web injects\"—injecting malicious HTML or JavaScript directly into the user's browser when they visit specific banking URLs to steal 2FA tokens or intercept transactions in real-time.</li>\n<li><strong>Cryptocurrency Targeting:</strong> The malware actively searches the filesystem for desktop cryptocurrency wallets and attempts to steal the `wallet.dat` files and associated authentication tokens.</li>\n<li><strong>Data Exfiltration:</strong> It collects extensive system details, captures keystrokes (keylogging) while the user is on targeted financial sites, and packages all stolen data into a compressed archive. This archive is then exfiltrated via encrypted HTTP POST requests to an attacker-controlled drop server.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Smheist infection is a critical security incident. The malware is designed to execute quickly; by the time the initial executable is detected by standard antivirus, the data exfiltration has usually already completed. The stolen session tokens and credentials can be immediately used to drain financial accounts or pivot into corporate financial systems.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Immediate Financial Lockout:</strong> The absolute highest priority is a complete password reset and the notification of financial institutions. ALL banking, corporate finance, and cryptocurrency credentials must be changed immediately from a *different, clean device*.</li>\n<li><strong>MFA Token Revocation:</strong> Assume session cookies were stolen. Force an immediate sign-out of all active sessions for critical web applications to invalidate the stolen tokens.</li>\n<li><strong>Endpoint Eradication:</strong> The extent of the data breach necessitates a full forensic review. Re-imaging the machine from a trusted baseline is required to ensure no secondary backdoors or persistent web injects remain on the system.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Smheist",
    "Banker.Smheist",
    "PWS.Heist"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1555.003",
    "T1056.001",
    "T1189",
    "T1048"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-02T06:44:44Z",
  "type": "Information Stealer / Banker",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}