def get_greynoise_info_ip():
ip_lookup = input("[+] 2 IPv4 query Enter IP Address to query: ")
greynoise_lookup = GreyNoise(api_key=GN_KEY)
gn_seen_before = greynoise_lookup.quick(ip_lookup)
print(style.BLUE + f'GreyNoise Output: {gn_seen_before}' + "\n")
def transform(self, records):
"""Method that processes and yield event records to the Splunk events pipeline."""
ip_addresses = self.ip
ip_field = self.ip_field
api_key = ""
EVENTS_PER_CHUNK = 5000
THREADS = 3
USE_CACHE = False
logger = utility.setup_logger(
session_key=self._metadata.searchinfo.session_key,
log_context=self._metadata.searchinfo.command)
if ip_addresses and ip_field:
logger.error(
"Please use parameter ip to work gnquick as generating command or "
"use parameter ip_field to work gnquick as transforming command."
)
self.write_error(
"Please use parameter ip to work gnquick as generating command or "
"use parameter ip_field to work gnquick as transforming command"
)
exit(1)
try:
message = ''
api_key = utility.get_api_key(
self._metadata.searchinfo.session_key, logger=logger)
except APIKeyNotFoundError as e:
message = str(e)
except HTTPError as e:
message = str(e)
if message:
self.write_error(message)
logger.error(
"Error occured while retrieving API key, Error: {}".format(
message))
exit(1)
if ip_addresses and not ip_field:
# This peice of code will work as generating command and will not use the Splunk events.
# Splitting the ip_addresses by commas and stripping spaces from both the sides for each IP address
ip_addresses = [ip.strip() for ip in ip_addresses.split(',')]
logger.info("Started retrieving results")
try:
logger.debug(
"Initiating to fetch noise and RIOT status for IP address(es): {}"
.format(str(ip_addresses)))
api_client = GreyNoise(api_key=api_key,
timeout=120,
integration_name=INTEGRATION_NAME)
# CACHING START
cache_enabled, cache_client = utility.get_caching(
self._metadata.searchinfo.session_key, 'multi', logger)
if int(cache_enabled) == 1 and cache_client is not None:
cache_start = time.time()
ips_not_in_cache, ips_in_cache = utility.get_ips_not_in_cache(
cache_client, ip_addresses, logger)
try:
response = []
if len(ips_in_cache) >= 1:
response = cache_client.query_kv_store(
ips_in_cache)
if response is None:
logger.debug(
"KVStore is not ready. Skipping caching mechanism."
)
noise_status = api_client.quick(ip_addresses)
elif response == []:
noise_status = utility.fetch_response_from_api(
api_client.quick, cache_client, ip_addresses,
logger)
else:
noise_status = utility.fetch_response_from_api(
api_client.quick, cache_client,
ips_not_in_cache, logger)
noise_status.extend(response)
except Exception:
logger.debug(
"An exception occurred while fetching response from cache.\n{}"
.format(traceback.format_exc()))
logger.debug(
"Generating command with caching took {} seconds.".
format(time.time() - cache_start))
else:
# Opting timout 120 seconds for the requests
noise_status = api_client.quick(ip_addresses)
logger.info("Retrieved results successfully")
# CACHING END
# Process the API response and send the noise and RIOT status information of IP with extractions
# to the Splunk, Using this flag to handle the field extraction issue in custom commands
# Only the fields extracted from the first event of generated by custom command
# will be extracted from all events
first_record_flag = True
# Flag to indicate whether erroneous IPs are present
erroneous_ip_present = False
for ip in ip_addresses:
for sample in noise_status:
if ip == sample['ip']:
yield event_generator.make_valid_event(
'quick', sample, first_record_flag)
if first_record_flag:
first_record_flag = False
logger.debug(
"Fetched noise and RIOT status for ip={} from GreyNoise API"
.format(str(ip)))
break
else:
erroneous_ip_present = True
try:
validate_ip(ip, strict=True)
except ValueError as e:
error_msg = str(e).split(":")
logger.debug(
"Generating noise and RIOT status for ip={} manually"
.format(str(ip)))
event = {'ip': ip, 'error': error_msg[0]}
yield event_generator.make_invalid_event(
'quick', event, first_record_flag)
if first_record_flag:
first_record_flag = False
if erroneous_ip_present:
logger.warn(
"Value of one or more IP address(es) is either invalid or non-routable"
)
self.write_warning(
"Value of one or more IP address(es) passed to {command_name} "
"is either invalid or non-routable".format(
command_name=str(
self._metadata.searchinfo.command)))
except RateLimitError:
logger.error(
"Rate limit error occured while fetching the context information for ips={}"
.format(str(ip_addresses)))
self.write_error(
"The Rate Limit has been exceeded. Please contact the Administrator"
)
except RequestFailure as e:
response_code, response_message = e.args
if response_code == 401:
msg = "Unauthorized. Please check your API key."
else:
# Need to handle this, as splunklib is unable to handle the exception with
# (400, {'error': 'error_reason'}) format
msg = (
"The API call to the GreyNoise platform have been failed "
"with status_code: {} and error: {}").format(
response_code,
response_message['error'] if isinstance(
response_message, dict) else response_message)
logger.error("{}".format(str(msg)))
self.write_error(msg)
except ConnectionError:
logger.error(
"Error while connecting to the Server. Please check your connection and try again."
)
self.write_error(
"Error while connecting to the Server. Please check your connection and try again."
)
except RequestException:
logger.error(
"There was an ambiguous exception that occurred while handling your Request. Please try again."
)
self.write_error(
"There was an ambiguous exception that occurred while handling your Request. Please try again."
)
except Exception:
logger.error("Exception: {} ".format(
str(traceback.format_exc())))
self.write_error(
"Exception occured while fetching the noise and RIOT status of the IP address(es). "
"See greynoise_main.log for more details.")
elif ip_field:
# Enter the mechanism only when the Search is complete and all the events are available
if self.search_results_info and not self.metadata.preview:
try:
# Strip the spaces from the parameter value if given
ip_field = ip_field.strip()
# Validating the given parameter
try:
ip_field = validator.Fieldname(
option_name='ip_field').validate(ip_field)
except ValueError as e:
# Validator will throw ValueError with error message when the parameters are not proper
logger.error(str(e))
self.write_error(str(e))
exit(1)
# API key validation
if not self.api_validation_flag:
api_key_validation, message = utility.validate_api_key(
api_key, logger)
logger.debug(
"API validation status: {}, message: {}".format(
api_key_validation, str(message)))
self.api_validation_flag = True
if not api_key_validation:
logger.info(message)
self.write_error(message)
exit(1)
# This piece of code will work as transforming command and will use
# the Splunk ingested events and field which is specified in ip_field.
chunk_dict = event_generator.batch(records, ip_field,
EVENTS_PER_CHUNK,
logger)
# This means there are only 1000 or below IPs to call in the entire bunch of records
# Use one thread with single thread with caching mechanism enabled for the chunk
if len(chunk_dict) == 1:
logger.info(
"Less then 1000 distinct IPs are present, "
"optimizing the IP requests call to GreyNoise API..."
)
THREADS = 1
USE_CACHE = True
api_client = GreyNoise(api_key=api_key,
timeout=120,
use_cache=USE_CACHE,
integration_name=INTEGRATION_NAME)
# When no records found, batch will return {0:([],[])}
tot_time_start = time.time()
if len(list(chunk_dict.values())[0][0]) >= 1:
for event in event_generator.get_all_events(
self._metadata.searchinfo.session_key,
api_client,
'multi',
ip_field,
chunk_dict,
logger,
threads=THREADS):
yield event
else:
logger.info(
"No events found, please increase the search timespan to have more search results."
)
tot_time_end = time.time()
logger.debug(
"Total execution time => {}".format(tot_time_end -
tot_time_start))
except Exception:
logger.info(
"Exception occured while adding the noise and RIOT status to the events, Error: {}"
.format(traceback.format_exc()))
self.write_error(
"Exception occured while adding the noise and RIOT status of "
"the IP addresses to events. See greynoise_main.log for more details."
)
else:
logger.error(
"Please specify exactly one parameter from ip and ip_field with some value."
)
self.write_error(
"Please specify exactly one parameter from ip and ip_field with some value."
)
