mraptor
mraptor is a tool designed to detect most malicious VBA Macros using generic heuristics. Unlike antivirus engines, it does not rely on signatures.
In a nutshell, mraptor detects keywords corresponding to the three following types of behaviour that are present in clear text in almost any macro malware:
- A: Auto-execution trigger
- W: Write to the file system or memory
- X: Execute a file or any payload outside the VBA context
mraptor considers that a macro is suspicious when A and (W or X) is true.
For more information about mraptor's detection algorithm, see the article How to detect most malicious macros without an antivirus.
mraptor can be used either as a command-line tool, or as a python module from your own applications.
It is part of the python-oletools package.
Usage: mraptor [options] <filename> [filename2 ...]
Options:
-h, --help show this help message and exit
-r find files recursively in subdirectories.
-z ZIP_PASSWORD, --zip=ZIP_PASSWORD
if the file is a zip archive, open all files from it,
using the provided password (requires Python 2.6+)
-f ZIP_FNAME, --zipfname=ZIP_FNAME
if the file is a zip archive, file(s) to be opened
within the zip. Wildcards * and ? are supported.
(default:*)
-l LOGLEVEL, --loglevel=LOGLEVEL
logging level debug/info/warning/error/critical
(default=warning)
-m, --matches Show matched strings.
An exit code is returned based on the analysis result:
- 0: No Macro
- 1: Not MS Office
- 2: Macro OK
- 10: ERROR
- 20: SUSPICIOUS
Scan a single file:
mraptor file.doc
Scan a single file, stored in a Zip archive with password "infected":
mraptor malicious_file.xls.zip -z infected
Scan a collection of files stored in a folder:
mraptor "MalwareZoo/VBA/*"
Important: on Linux/MacOSX, always add double quotes around a file name when you use
wildcards such as * and ?. Otherwise, the shell may replace the argument with the actual
list of files matching the wildcards before starting the script.
Since v0.54, mraptor is fully compatible with both Python 2 and 3. There is no need to use mraptor3 anymore, however it is still present for backward compatibility.
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