{
  "family": "sbdld",
  "sample_count": 1,
  "category": "trojan",
  "description": "<h3>Executive Summary</h3>\nSBDLD (often classified as Trojan.Downloader.SBDLD) is a malicious Trojan explicitly designed to act as a stealthy vanguard for subsequent cyberattacks. Its primary function is to covertly infiltrate Windows systems, establish a persistent foothold, and act as a highly reliable downloader for remote threat actors, facilitating the automated deployment of secondary, highly destructive malware payloads.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nSBDLD is predominantly distributed through socially engineered spam campaigns containing malicious attachments (often weaponized PDFs or Office documents utilizing macro exploits) or via compromised software installers downloaded from untrustworthy web portals.\n\nUpon successful execution, SBDLD operates with a focus on stealth and payload delivery:\n<ul>\n<li><strong>System Reconnaissance:</strong> The trojan immediately collects detailed system information, including the OS version, installed software, Active Directory domain membership, and active antivirus solutions. This fingerprint is transmitted to a command-and-control (C2) server.</li>\n<li><strong>Persistence:</strong> SBDLD ensures it survives system reboots by modifying the Windows Registry (e.g., adding entries to the `Run` or `RunOnce` keys) or by creating hidden Scheduled Tasks that execute the malware payload under high privileges.</li>\n<li><strong>Payload Delivery:</strong> Acting as a downloader, SBDLD receives instructions from the C2 server to silently download and execute secondary malware. This provides the attacker with a flexible platform to escalate the attack based on the value of the compromised host.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nAn SBDLD infection represents a significant breach of the endpoint perimeter. Because it provides remote attackers with the ability to execute arbitrary code, a single compromised machine can rapidly be utilized to pivot laterally and compromise the entire corporate network.\n\n<h3>Remediation and Eradication</h3>\n<ul>\n<li><strong>Endpoint Detection and Response (EDR):</strong> Configure EDR solutions to monitor for anomalous registry modifications and unauthorized outbound network connections to unknown IP addresses.</li>\n<li><strong>Network Isolation and Sweeps:</strong> Immediately isolate the infected endpoint from the LAN. Conduct a thorough forensic sweep to identify not only the SBDLD executable but also any secondary payloads it may have successfully deployed.</li>\n<li><strong>Credential Reset:</strong> Because SBDLD frequently facilitates the deployment of info-stealers, all user credentials associated with the compromised endpoint must be treated as compromised and immediately reset.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "Trojan.Downloader.SBDLD",
    "Trojan.SBDLD",
    "Win32/SBDLD"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1105",
    "T1547.001",
    "T1059"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-01T17:06:28Z",
  "type": "Trojan Downloader",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}