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

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import json
import dns.resolver
misperrors = {'error': 'Error'}
mispattributes = {'input': ['hostname', 'domain', 'domain|ip'], 'output': ['ip-src',
'ip-dst']}
moduleinfo = {'version': '0.2', 'author': 'Alexandre Dulaunoy',
'description': 'Simple DNS expansion service to resolve IP address from MISP attributes',
'module-type': ['expansion', 'hover']}
moduleconfig = ['nameserver']
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def handler(q=False):
if q is False:
return False
request = json.loads(q)
if request.get('hostname'):
toquery = request['hostname']
elif request.get('domain'):
toquery = request['domain']
elif request.get('domain|ip'):
toquery = request['domain|ip'].split('|')[0]
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else:
return False
r = dns.resolver.Resolver()
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r.timeout = 2
r.lifetime = 2
if request.get('config'):
if request['config'].get('nameserver'):
nameservers = []
nameservers.append(request['config'].get('nameserver'))
r.nameservers = nameservers
else:
r.nameservers = ['8.8.8.8']
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try:
answer = r.resolve(toquery, 'A')
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except dns.resolver.NXDOMAIN:
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misperrors['error'] = "NXDOMAIN"
return misperrors
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except dns.exception.Timeout:
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misperrors['error'] = "Timeout"
return misperrors
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except Exception:
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misperrors['error'] = "DNS resolving error"
return misperrors
r = {'results': [{'types': mispattributes['output'],
'values':[str(answer[0])]}]}
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return r
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def introspection():
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return mispattributes
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def version():
moduleinfo['config'] = moduleconfig
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return moduleinfo