{
  "family": "suixin",
  "sample_count": 1,
  "category": "trojan",
  "description": "<h3>Executive Summary</h3>\nSuixin is a malicious Trojan and Spyware application designed to covertly infiltrate Windows systems, establish persistence, and harvest sensitive user data for remote threat actors. It is frequently utilized in targeted campaigns to gather intelligence, exfiltrate intellectual property, or steal credentials necessary to facilitate deeper network compromise.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nSuixin is typically distributed through highly targeted spear-phishing campaigns, malicious email attachments (such as weaponized Office documents), or via \"drive-by downloads\" originating from compromised, legitimate websites.\n\nUpon successful execution, Suixin operates with a focus on stealth and data harvesting:\n<ul>\n<li><strong>Information Stealing:</strong> The primary function of Suixin is to silently harvest sensitive data. It actively searches for and exfiltrates stored passwords from web browsers, FTP clients, and email applications. It may also capture keystrokes (keylogging) and take periodic screenshots of the user's desktop.</li>\n<li><strong>Persistence:</strong> Suixin ensures it survives system reboots by deeply modifying the Windows Registry (e.g., adding entries to the `Run` keys) or by dropping its executable into critical Windows system folders to camouflage itself as a legitimate process.</li>\n<li><strong>Covert Exfiltration:</strong> The harvested intelligence is securely packaged and transmitted to a command-and-control (C2) server. To evade detection, Suixin often utilizes standard protocols like HTTP/HTTPS or SMTP to blend in with legitimate outbound network traffic.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nA Suixin infection represents a critical breach of confidentiality. Because it actively harvests credentials, a single compromised machine can provide attackers with the exact usernames and passwords required to bypass VPNs, access corporate email, and pivot laterally across the network.\n\n<h3>Remediation and Eradication</h3>\n<ul>\n<li><strong>Network Isolation:</strong> Immediately isolate the infected endpoint from the LAN to halt the active exfiltration of sensitive data to the attacker's C2 server.</li>\n<li><strong>Global Credential Reset:</strong> Assume all credentials utilized on the infected machine, as well as any cached network credentials, have been stolen. Force an immediate reset of all associated passwords from a known-secure device.</li>\n<li><strong>Endpoint Sweeps:</strong> Conduct a thorough forensic sweep using enterprise EDR tools to identify the Suixin executable, its persistence mechanisms in the registry, and any dropped files.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Spy.Suixin",
    "Spyware.Suixin",
    "Win32/Suixin"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1056.001",
    "T1113",
    "T1555",
    "T1059"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-01T17:20:25Z",
  "type": "Trojan / Spyware",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}