mirror of https://github.com/MISP/misp-modules
50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
import json
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try:
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import yaml
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from sigma.parser.rule import SigmaParser
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from sigma.configuration import SigmaConfiguration
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except ImportError:
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print("sigma or yaml is missing, use 'pip3 install sigmatools' to install it.")
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misperrors = {'error': 'Error'}
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mispattributes = {'input': ['sigma'], 'output': ['text']}
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moduleinfo = {
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'version': '0.1',
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'author': 'Christian Studer',
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'module-type': ['expansion', 'hover'],
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'name': 'Sigma Syntax Validator',
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'description': 'An expansion hover module to perform a syntax check on sigma rules.',
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'logo': 'sigma.png',
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'requirements': ['Sigma python library', 'Yaml python library'],
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'features': 'This module takes a Sigma rule attribute as input and performs a syntax check on it.\n\nIt displays then that the rule is valid if it is the case, and the error related to the rule otherwise.',
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'references': ['https://github.com/Neo23x0/sigma/wiki'],
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'input': 'A Sigma attribute.',
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'output': 'Text describing the validity of the Sigma rule.',
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}
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moduleconfig = []
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def handler(q=False):
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if q is False:
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return False
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request = json.loads(q)
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if not request.get('sigma'):
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misperrors['error'] = 'Sigma rule missing'
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return misperrors
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config = SigmaConfiguration()
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try:
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parser = SigmaParser(yaml.safe_load(request.get('sigma')), config)
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result = ("Syntax valid: {}".format(parser.values))
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except Exception as e:
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result = ("Syntax error: {}".format(str(e)))
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return {'results': [{'types': mispattributes['output'], 'values': result}]}
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def introspection():
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return mispattributes
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def version():
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moduleinfo['config'] = moduleconfig
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return moduleinfo
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