{
  "family": "wdfload",
  "sample_count": 358,
  "category": "trojan_generic",
  "description": "Trojan:Win32/Wdfload is a specialized trojan downloader frequently utilized in multi-stage malware campaigns to establish a secure beachhead and deploy secondary, highly destructive payloads.<br><br><b>Understanding Wdfload</b><br>To the end-user, Wdfload provides zero visual indicators of infection. For SOC analysts, Wdfload is a critical alert. It is an 'Initial Access Broker' tool. Its primary function is to securely bypass endpoint defenses, profile the infected machine to ensure it is not running in a sandbox, and reach out to a Command-and-Control (C2) server to pull down the final payload, which is frequently ransomware or an advanced banking trojan.<br><br><b>Execution and Evasion Strategies</b><br>Wdfload is commonly distributed via weaponized email attachments (spearphishing) or malicious links. Upon execution, it utilizes heavy packing and obfuscation to evade static antivirus signatures. It drops a randomized executable into the <code>%Temp%</code> or <code>%LocalAppData%</code> directories. Persistence is achieved by creating a hidden scheduled task or modifying the Registry Run keys. Wdfload often injects its downloading routine into legitimate system processes (like <code>explorer.exe</code> or <code>svchost.exe</code>) to hide its outbound network traffic.<br><br><b>Indicators of Compromise (IoCs)</b><br>Threat hunters should investigate EDR alerts related to 'Suspicious Process Injection' or 'Anomalous Child Process Spawning'. Network logs will often reveal Wdfload reaching out to compromised domains using encrypted HTTP/HTTPS traffic. The presence of unexpected, hidden scheduled tasks designed to execute randomly named, highly entropic binaries in the user's profile is a strong IoC. Memory analysis is necessary to extract the injected downloader modules.",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [],
  "enrichment_level": "expert-seo",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1105",
    "T1566.001",
    "T1027",
    "T1053.005",
    "T1055"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-06-09",
  "mitre_attack_detail": [
    {
      "id": "T1105",
      "name": "Ingress Tool Transfer",
      "tactic": "Command and Control"
    },
    {
      "id": "T1055",
      "name": "Process Injection",
      "tactic": "Defense Evasion"
    },
    {
      "id": "T1053.005",
      "name": "Scheduled Task/Job: Scheduled Task",
      "tactic": "Persistence"
    },
    {
      "id": "T1566.001",
      "name": "Phishing: Spearphishing Attachment",
      "tactic": "Initial Access"
    },
    {
      "id": "T1027",
      "name": "Obfuscated Files or Information",
      "tactic": "Defense Evasion"
    }
  ],
  "containment_steps": [
    "Isolate the endpoint immediately to prevent Wdfload from downloading and executing its secondary payloads (e.g., ransomware).",
    "Audit the Windows Task Scheduler and Registry Run keys to identify and remove the Wdfload persistence mechanisms.",
    "Review firewall and proxy logs to identify the C2 domains Wdfload attempted to contact, and block them enterprise-wide.",
    "Capture a live memory image (RAM dump) to extract the injected Wdfload modules and identify the secondary payloads."
  ],
  "what_to_avoid": [
    "Do not close an incident simply because the initial Wdfload dropper was quarantined; always verify if secondary payloads were downloaded.",
    "Avoid relying solely on manual file deletion, as the injected processes will likely just recreate the dropped binaries."
  ],
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}