VBA Malicious Macro Pattern Detector
Scan VBA macro code for malicious patterns including auto-execute macros (AutoOpen, Document_Open), process/command execution (Shell, WScript.Shell), HTTP requests (WinHttpRequest, XMLHTTP), file operations, COM object abuse, anti-detection techniques, data exfiltration, obfuscation, registry access, and email/MAPI access. Each detection includes a severity rating from Critical to Info with actionable security recommendations. Free, private, and no signup required.
Detect potentially malicious patterns in VBA macro code. Automatically identifies auto-execute macros, process/command execution, HTTP requests, file operations, COM object abuse, anti-detection techniques, data exfiltration, obfuscation, registry access, and email access patterns with severity ratings and security recommendations.
Paste VBA macro code above and click Scan VBA Code to detect malicious patterns. The tool identifies auto-execute macros, process/command execution (Shell), HTTP requests (WinHttpRequest, XMLHTTP), file operations, COM object abuse, anti-detection techniques, data exfiltration, obfuscation, registry access, and email access patterns with severity ratings. Try loading an example to see how it works!
Why Use Our VBA Malicious Macro Pattern Detector?
10 Malicious Pattern Categories
Detects auto-execute macros (AutoOpen, Document_Open), process/command execution (Shell, WScript.Shell.Run), HTTP requests (WinHttpRequest, XMLHTTP, MSXML2), file operations (Write#, Open for Output, FileSystemObject), ActiveX/COM object creation (CreateObject, GetObject), anti-detection techniques (DisplayAlerts, ScreenUpdating), data exfiltration patterns, obfuscation (Chr(), Execute, Base64), registry access, and email/MAPI access patterns.
Severity-Ranked Results with Risk Scoring
Every detected pattern receives a severity rating from Critical to Info with a clear description of the threat and a security recommendation. An overall risk score (0-100) and risk level (Low/Medium/High/Critical) provides an at-a-glance assessment of the macro code, with a color-coded risk bar visualization.
Annotated Code View with Context
View your VBA code with inline annotations marking each detected malicious pattern. Each annotation includes the severity badge, category name, and pattern description at the exact source line. Patterns are sorted by severity (critical first) so the most dangerous findings appear at the top.
100% Browser-Local & Private
All VBA macro analysis runs entirely in your browser. Your macro code, all detected patterns, severity ratings, and analysis results never leave your device. No server uploads, no API calls, no data storage, and no tracking. Completely safe for analyzing suspicious or sensitive VBA macros.
Common Use Cases for VBA Malicious Macro Pattern Detector
Malicious Document Triage & Analysis
Quickly analyze suspicious Office documents (.doc, .xls, .ppt) containing VBA macros for malicious indicators. The detector identifies auto-execute macros, process execution via Shell/WScript.Shell, HTTP connections to remote hosts, and file system operations - helping security analysts triage macro-enabled documents in minutes.
Macro Malware & Dropper Analysis
Analyze VBA macro-based malware samples for their key behavioral patterns. Common macro malware uses Chr() string obfuscation, CreateObject for COM abuse (WScript.Shell, WinHttpRequest, FileSystemObject), auto-execute triggers (AutoOpen, Document_Open), and encoded payload delivery. The detector flags each technique with severity and recommendations.
Phishing Document Investigation
Investigate phishing emails containing malicious Office attachments. The detector reveals hidden macro behavior such as obfuscated strings, HTTP beaconing, registry persistence, and data exfiltration patterns. The annotated code view shows exactly which lines contain malicious patterns and why they are dangerous.
Security Auditing of VBA Macros
During security audits of Office documents and VBA-enabled business applications, scan macros for credential theft, data exfiltration, and unauthorized network access patterns. The detector highlights COM object creation, file operations, and email/MAPI access that could indicate data theft or unauthorized communications.
Educational Tool for VBA Malware Techniques
Learn how macro malware works by understanding real malicious patterns detected by the tool. See how AutoOpen macros trigger on document open, how Chr() builds obfuscated strings, how CreateObject creates WMI/WinHTTP objects, and how data exfiltration patterns like Environment("APPDATA") and HTTP.send work in practice.
Incident Response Document Analysis
During incident response on compromised systems, analyze recovered Office documents for hidden macro payloads, C2 beaconing URLs, and persistence mechanisms. The risk score provides an at-a-glance severity assessment while detailed pattern descriptions guide remediation recommendations.
Understanding VBA Malicious Macro Pattern Detection
What is VBA Malicious Macro Pattern Detection?
VBA malicious macro pattern detection is the process of scanning VBA (Visual Basic for Applications) macro code for behavioral patterns commonly associated with malware, phishing, and unauthorized system access. Macro malware uses VBA code embedded in Office documents to infect systems, download payloads, exfiltrate data, and establish persistence. Common malicious patterns include auto-executing macros (AutoOpen, Document_Open), process/command execution via Shell() or WScript.Shell, HTTP requests using WinHttpRequest or XMLHTTP objects, file system manipulation through FileSystemObject, COM object creation with CreateObject, anti-detection techniques that disable security prompts, data obfuscation using Chr() functions, registry modifications for persistence, and email/MAPI access for data theft.
How Our VBA Malicious Macro Pattern Detector Works
The VBA Malicious Macro Pattern Detector scans VBA source code using 10 categories of language-aware regular expression patterns. Here is how the detection process works:
- Input your VBA code: Paste any VBA macro code into the input panel and click Scan VBA Code. The detector processes each line of code using specialized pattern matching for 10 categories of malicious behavior.
- Pattern matching and severity scoring: Each line is scanned against 50+ malicious pattern definitions. Each detected pattern receives a severity rating (Critical/High/Medium/Low/Info) with a base weight (25/15/8/3/1 points). The total risk score (0-100) determines the overall risk level.
- Annotated results and recommendations: The tool generates annotated code with inline detection markers, a complete list of detected patterns with descriptions, and actionable security recommendations for each finding. Copy the full report or individual pattern details.
What Gets Detected - 10 Pattern Categories
- Auto-Execute Macros: AutoOpen, Document_Open, Workbook_Open, AutoExec, and other event-driven triggers that execute code without user interaction.
- Process/Command Execution: Shell(), WScript.Shell, ScriptControl, and .Run/.Exec methods that can execute arbitrary system commands.
- HTTP Requests: WinHttpRequest, XMLHTTP, MSXML2 object creation for network communication with remote servers.
- File Operations: Write#, Open for Output, SaveAs, Kill, FileSystemObject for reading, writing, and deleting files on disk.
- COM Object Abuse: CreateObject and GetObject for creating ActiveX/COM objects that provide system-level access.
- Anti-Detection: Disabling DisplayAlerts, ScreenUpdating, EnableEvents to hide macro execution from the user.
- Data Exfiltration: Email object creation, file write operations, and HTTP send calls that exfiltrate data from the system.
- Obfuscation: Chr() concatenation, Execute, Eval, Base64 decoding, and encoded ProgID patterns used to hide malicious intent.
- Registry Access: RegRead, RegWrite, RegDelete via WScript.Shell for persistence and system configuration.
- Email/MAPI Access: CDO.Message, MAPI.Session, Outlook.Application for reading and sending emails from the host.
Privacy & Security
This tool runs entirely in your browser using client-side JavaScript. The VBA macro code you paste, all detected malicious patterns, severity ratings, annotated code, and analysis results are never uploaded to any server, stored in any database, or transmitted over the network. All scanning, pattern matching, and analysis executes locally on your device. There are no API calls, analytics tracking, cookies, or data collection of any kind. This makes it completely safe for analyzing sensitive macro code, zero-day malware samples, phishing documents, or proprietary VBA business applications.
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Frequently Asked Questions About VBA Malicious Macro Pattern Detection
The tool detects patterns across 10 categories: auto-execute macros (AutoOpen, Document_Open, Workbook_Open, AutoExec, AutoClose), process/command execution (Shell(), WScript.Shell, ScriptControl), HTTP requests (WinHttpRequest, XMLHTTP, MSXML2), file operations (Write#, Open for Output, SaveAs, Kill, FileSystemObject), ActiveX/COM object creation (CreateObject, GetObject), anti-detection techniques (disabling DisplayAlerts, ScreenUpdating, EnableEvents), data exfiltration patterns, obfuscation (Chr(), Execute, Base64, encoded ProgIDs), registry access (RegRead, RegWrite, RegDelete), and email/MAPI access (CDO.Message, MAPI.Session, Outlook.Application).
Each detected pattern has a base severity weight: Critical (25 points), High (15), Medium (8), Low (3), and Info (1). The total risk score is the sum of all detected pattern weights, capped at 100. The overall risk level is determined as: Low (0-9), Medium (10-29), High (30-59), and Critical (60-100). The risk bar provides a visual representation, while the detection summary describes the findings in plain language.
The annotated code view displays your original VBA source code with inline comments added at each line where a malicious pattern was detected. Each annotation includes the severity badge (Critical/High/Medium/Low/Info) and category name (e.g., "Process/Command Execution" or "Auto-Execute Macro") with a brief description. This makes it easy to visually scan through the code and understand exactly which lines contain malicious behavior and why.
No. The tool covers the most common VBA malicious patterns but cannot detect all methods. It cannot detect dynamically constructed strings built through runtime concatenation of many variables, macros that use direct API calls via Declare Function, custom encryption/decryption routines that use non-standard algorithms, or VBA code that is heavily polymorphic or uses indirect execution through array-based dispatching. Advanced macro malware may require dynamic analysis in a sandbox environment.
The tool detects behavioral patterns (like process execution, HTTP requests, and COM object abuse) that are common across both known and unknown macro malware. Even if a specific malware sample is previously unseen (zero-day), its malicious behavior patterns will still be flagged. However, novel obfuscation techniques or evasion methods that use unusual VBA patterns may not be detected.
The detector uses specific pattern matching rather than generic heuristics to minimize false positives. For example, CreateObject() alone is flagged as Low severity since it is used in many legitimate macros, while CreateObject("WScript.Shell") is flagged as Critical due to its command execution capabilities. JavaScript-like or overly broad patterns are avoided in favor of VBA-specific malicious technique signatures.
Absolutely. The VBA Malicious Macro Pattern Detector runs entirely in your browser. Your VBA code, all detected patterns, severity ratings, analysis results, and annotated output are never uploaded to any server, stored in any database, or transmitted over the network. All processing happens locally on your device with no API calls or data collection. You can safely analyze sensitive, proprietary, or classified macro code.
Antivirus software scans for known malware signatures and uses heuristics to detect suspicious files. This tool instead analyzes the actual VBA source code for behavioral patterns commonly associated with macro malware. It provides detailed explanations of each finding, severity ratings, and security recommendations. It does not rely on signature databases so it can detect patterns used by both known and custom macro malware. The annotated code view shows exactly which lines contain malicious patterns.
Yes - 100% free with no signup, no account, and no usage limits. Analyze as many VBA macros as you need, as many times as you want. There are no premium tiers, hidden charges, or rate limits. The tool runs entirely in your browser - your code never leaves your device.