mirror of https://github.com/MISP/misp-modules
45 lines
1.6 KiB
Python
45 lines
1.6 KiB
Python
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import json
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import sys
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misperrors = {'error': 'Error'}
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moduleinfo = {'version': '1', 'author': 'Christian STUDER',
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'description': 'Yara export for hashes.',
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'module-type': ['expansion', 'hover'],
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'require_standard_format': True}
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moduleconfig = []
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mispattributes = {'input': ['md5', 'sha1', 'sha256', 'filename|md5', 'filename|sha1', 'filename|sha256'], 'output': ['yara rule']}
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def hash_cond(hashtype, hashvalue):
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condition = 'hash.{}(0, filesize) == {}'.format(hashtype, hashvalue.lower())
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return condition, 'hash'
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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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del request['module']
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if 'event_id' in request:
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del request['event_id']
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uuid = request.pop('attribute_uuid') if 'attribute_uuid' in request else None
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rules = []
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types = []
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for attribute_type, value in request.items():
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if 'filename' in attribute_type:
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_, attribute_type = attribute_type.split('|')
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_, value = value.split('|')
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condition, required_module = hash_cond(attribute_type, value)
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condition = '\r\n\t\t'.join([condition])
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import_section = '\r\n'.join(['import "{}"'.format(required_module)])
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rule_start = 'rule %s {' % uuid if uuid else 'rule {'
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condition = '\tcondition:\r\n\t\t{}'.format(condition)
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rules.append('\r\n'.join([rule_start, condition, '}']))
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types.append('yara')
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return {'results': [{'types': [t], 'values': [v]} for t, v in zip(types, rules)]}
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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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