{
  "family": "vbcode",
  "sample_count": 1,
  "category": "ransomware",
  "description": "<h3>Executive Summary</h3>\nVBCode is a general classification given to malicious scripts or Trojans written entirely or predominantly in Visual Basic Script (VBScript) or utilizing VBA (Visual Basic for Applications) macros. This classification highlights malware that leverages the native scripting capabilities of the Windows OS and Microsoft Office suite to execute \"fileless\" attacks, evade traditional antivirus, and establish persistence without writing compiled binary files (like .exe) to disk.\n\n<h3>Infection Vector and Technical Capabilities</h3>\nVBCode malware relies almost entirely on social engineering and the exploitation of legitimate administrative tools:\n<ul>\n<li><strong>Macro-Enabled Documents:</strong> The primary distribution vector involves spear-phishing emails containing weaponized Word or Excel documents. When the user enables macros, the embedded VBA code executes, acting as a lightweight dropper.</li>\n<li><strong>Living off the Land (LotL):</strong> VBCode scripts do not need to bring their own execution environment; they utilize the native Windows Script Host (`wscript.exe` or `cscript.exe`). By utilizing these trusted system binaries, the malware frequently bypasses application whitelisting and basic endpoint controls.</li>\n<li><strong>Obfuscation and Execution:</strong> The VBScript files are often heavily obfuscated (using string reversal, character encoding, or variable randomization) to hide their intent from static scanners. Upon execution, the script typically reaches out to a remote C2 server to download and execute secondary payloads (like PowerShell scripts or compiled trojans) directly into memory.</li>\n</ul>\n\n<h3>Threat Assessment</h3>\nWhile a VBScript file itself is small and seemingly simple, VBCode malware represents a highly effective initial access technique. The reliance on native tools makes it difficult to detect, and it frequently serves as the gateway for severe enterprise threats, including ransomware deployment or the establishment of persistent backdoor access.\n\n<h3>Incident Response and Remediation</h3>\n<ul>\n<li><strong>Macro Security Policies:</strong> The most effective defense against VBCode malware is preventative: Enforce strict Group Policies that disable macros for Microsoft Office documents downloaded from the internet (Mark of the Web) globally across the enterprise.</li>\n<li><strong>Script Host Restrictions:</strong> Monitor or restrict the execution of `wscript.exe` and `cscript.exe` using EDR or AppLocker, especially when those processes are spawned directly by Office applications or email clients.</li>\n<li><strong>Behavioral Monitoring:</strong> Security teams must focus on the behavior of the script host rather than static file scanning. Monitor for VBScript execution that spawns PowerShell, attempts unauthorized registry modifications, or makes outbound network connections to unknown IP addresses.</li>\n</ul>",
  "cta": "Published by the SystemHelpdesk team.",
  "aliases": [
    "VBS.Downloader",
    "Trojan.VBScript",
    "Macro.VBCode"
  ],
  "enrichment_level": "insufficient_information",
  "faq": [],
  "faq_count": 0,
  "mitre_attack": [
    "T1059.005",
    "T1566.001",
    "T1059.001"
  ],
  "cisa_advisory": null,
  "last_updated": "2026-07-01T17:09:54Z",
  "type": "Trojan / Macro",
  "target_industries": [
    "Global / Opportunistic"
  ],
  "motivation": "Opportunistic",
  "threat_actors": [
    "Unknown / Cybercriminal"
  ],
  "target_geographies": [
    "Global"
  ]
}