misp-modules/misp_modules/modules/expansion/yara_syntax_validator.py

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import json
try:
import yara
except (OSError, ImportError):
print("yara is missing, use 'pip3 install -I -r REQUIREMENTS' from the root of this repository to install it.")
misperrors = {'error': 'Error'}
mispattributes = {'input': ['yara'], 'output': ['text']}
moduleinfo = {'version': '0.1', 'author': 'Dennis Rand', 'description': 'An expansion hover module to perform a syntax check on if yara rules are valid or not.', 'module-type': ['hover']}
moduleconfig = []
def handler(q=False):
if q is False:
return False
request = json.loads(q)
if not request.get('yara'):
misperrors['error'] = 'Yara rule missing'
return misperrors
try:
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yara.compile(source=request.get('yara'))
summary = ("Syntax valid")
except Exception as e:
summary = ("Syntax error: " + str(e))
r = {'results': [{'types': mispattributes['output'], 'values': summary}]}
return r
def introspection():
return mispattributes
def version():
moduleinfo['config'] = moduleconfig
return moduleinfo