mirror of https://github.com/CIRCL/AIL-framework
perf: use defined compiled regex
re.compile(regex) definition was not used use compile_regex.findAll() directely instead of re.findall(regex)pull/569/head
osagit
GitHub
parent
4d6de7a397
commit
22693dca1c
208
bin/Decoder.py
208
bin/Decoder.py
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@ -5,6 +5,10 @@
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Dectect Binary and decode it
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Dectect Binary and decode it
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"""
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"""
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##################################
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# Import External packages
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##################################
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import time
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import time
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import os
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import os
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import redis
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import redis
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@ -13,16 +17,19 @@ from hashlib import sha1
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import magic
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import magic
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import json
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import json
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import datetime
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import datetime
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from pubsublogger import publisher
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from pubsublogger import publisher
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import re
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import signal
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from lib import Decoded
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##################################
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# Import Project packages
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##################################
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from module.abstract_module import AbstractModule
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from Helper import Process
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from Helper import Process
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from packages import Item
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from packages import Item
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from lib import Decoded
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import re
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import signal
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class TimeoutException(Exception):
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class TimeoutException(Exception):
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pass
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pass
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@ -32,128 +39,135 @@ def timeout_handler(signum, frame):
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signal.signal(signal.SIGALRM, timeout_handler)
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signal.signal(signal.SIGALRM, timeout_handler)
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def hex_decoder(hexStr):
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#hexStr = ''.join( hex_string.split(" ") )
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return bytes(bytearray([int(hexStr[i:i+2], 16) for i in range(0, len(hexStr), 2)]))
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def binary_decoder(binary_string):
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class Decoder(AbstractModule):
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return bytes(bytearray([int(binary_string[i:i+8], 2) for i in range(0, len(binary_string), 8)]))
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"""
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Decoder module for AIL framework
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"""
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def base64_decoder(base64_string):
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# TODO to lambda expr
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return base64.b64decode(base64_string)
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def hex_decoder(self, hexStr):
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#hexStr = ''.join( hex_string.split(" ") )
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def decode_string(content, item_id, item_date, encoded_list, decoder_name, encoded_min_size):
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return bytes(bytearray([int(hexStr[i:i+2], 16) for i in range(0, len(hexStr), 2)]))
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find = False
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for encoded in encoded_list:
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if len(encoded) >= encoded_min_size:
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decoded_file = decoder_function[decoder_name](encoded)
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find = True
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sha1_string = sha1(decoded_file).hexdigest()
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mimetype = Decoded.get_file_mimetype(decoded_file)
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if not mimetype:
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print(item_id)
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print(sha1_string)
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raise Exception('Invalid mimetype')
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Decoded.save_decoded_file_content(sha1_string, decoded_file, item_date, mimetype=mimetype)
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Decoded.save_item_relationship(sha1_string, item_id)
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Decoded.create_decoder_matadata(sha1_string, item_id, decoder_name)
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#remove encoded from item content
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content = content.replace(encoded, '', 1)
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print('{} : {} - {}'.format(item_id, decoder_name, mimetype))
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if(find):
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set_out_item(decoder_name, item_id)
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return content
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def set_out_item(decoder_name, item_id):
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publisher.warning(decoder_name+' decoded')
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#Send to duplicate
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p.populate_set_out(item_id, 'Duplicate')
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msg = 'infoleak:automatic-detection="'+decoder_name+'";{}'.format(item_id)
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p.populate_set_out(msg, 'Tags')
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if __name__ == '__main__':
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# TODO to lambda expr
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# If you wish to use an other port of channel, do not forget to run a subscriber accordingly (see launch_logs.sh)
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def binary_decoder(self, binary_string):
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# Port of the redis instance used by pubsublogger
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return bytes(bytearray([int(binary_string[i:i+8], 2) for i in range(0, len(binary_string), 8)]))
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publisher.port = 6380
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# Script is the default channel used for the modules.
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publisher.channel = 'Script'
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# Section name in bin/packages/modules.cfg
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config_section = 'Decoder'
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# Setup the I/O queues
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# TODO to lambda expr
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p = Process(config_section)
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def base64_decoder(self, base64_string):
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return base64.b64decode(base64_string)
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serv_metadata = redis.StrictRedis(
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host=p.config.get("ARDB_Metadata", "host"),
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port=p.config.getint("ARDB_Metadata", "port"),
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db=p.config.getint("ARDB_Metadata", "db"),
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decode_responses=True)
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# Sent to the logging a description of the module
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def __init__(self):
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publisher.info("Decoder started")
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super(Decoder, self).__init__(logger_channel="script:decoder")
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regex_binary = '[0-1]{40,}'
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serv_metadata = redis.StrictRedis(
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#regex_hex = '(0[xX])?[A-Fa-f0-9]{40,}'
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host=self.process.config.get("ARDB_Metadata", "host"),
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regex_hex = '[A-Fa-f0-9]{40,}'
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port=self.process.config.getint("ARDB_Metadata", "port"),
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regex_base64 = '(?:[A-Za-z0-9+/]{4}){2,}(?:[A-Za-z0-9+/]{2}[AEIMQUYcgkosw048]=|[A-Za-z0-9+/][AQgw]==)'
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db=self.process.config.getint("ARDB_Metadata", "db"),
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decode_responses=True)
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re.compile(regex_binary)
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regex_binary = '[0-1]{40,}'
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re.compile(regex_hex)
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#regex_hex = '(0[xX])?[A-Fa-f0-9]{40,}'
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re.compile(regex_base64)
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regex_hex = '[A-Fa-f0-9]{40,}'
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regex_base64 = '(?:[A-Za-z0-9+/]{4}){2,}(?:[A-Za-z0-9+/]{2}[AEIMQUYcgkosw048]=|[A-Za-z0-9+/][AQgw]==)'
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# map decoder function
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cmp_regex_binary = re.compile(regex_binary)
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decoder_function = {'binary':binary_decoder,'hexadecimal':hex_decoder, 'base64':base64_decoder}
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cmp_regex_hex = re.compile(regex_hex)
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cmp_regex_base64 = re.compile(regex_base64)
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hex_max_execution_time = p.config.getint("Hex", "max_execution_time")
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# map decoder function
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binary_max_execution_time = p.config.getint("Binary", "max_execution_time")
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self.decoder_function = {'binary':self.binary_decoder,'hexadecimal':self.hex_decoder, 'base64':self.base64_decoder}
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base64_max_execution_time = p.config.getint("Base64", "max_execution_time")
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# list all decoder yith regex,
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hex_max_execution_time = self.process.config.getint("Hex", "max_execution_time")
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decoder_binary = {'name': 'binary', 'regex': regex_binary, 'encoded_min_size': 300, 'max_execution_time': binary_max_execution_time}
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binary_max_execution_time = self.process.config.getint("Binary", "max_execution_time")
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decoder_hexadecimal = {'name': 'hexadecimal', 'regex': regex_hex, 'encoded_min_size': 300, 'max_execution_time': hex_max_execution_time}
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base64_max_execution_time = self.process.config.getint("Base64", "max_execution_time")
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decoder_base64 = {'name': 'base64', 'regex': regex_base64, 'encoded_min_size': 40, 'max_execution_time': base64_max_execution_time}
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decoder_order = [ decoder_base64, decoder_binary, decoder_hexadecimal, decoder_base64]
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# list all decoder with regex,
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decoder_binary = {'name': 'binary', 'regex': cmp_regex_binary, 'encoded_min_size': 300, 'max_execution_time': binary_max_execution_time}
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decoder_hexadecimal = {'name': 'hexadecimal', 'regex': cmp_regex_hex, 'encoded_min_size': 300, 'max_execution_time': hex_max_execution_time}
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decoder_base64 = {'name': 'base64', 'regex': cmp_regex_base64, 'encoded_min_size': 40, 'max_execution_time': base64_max_execution_time}
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for decoder in decoder_order:
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self.decoder_order = [ decoder_base64, decoder_binary, decoder_hexadecimal, decoder_base64]
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serv_metadata.sadd('all_decoder', decoder['name'])
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# Endless loop getting messages from the input queue
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for decoder in self.decoder_order:
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while True:
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serv_metadata.sadd('all_decoder', decoder['name'])
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# Get one message from the input queue
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message = p.get_from_set()
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if message is None:
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publisher.debug("{} queue is empty, waiting".format(config_section))
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# Waiting time in secondes between to message proccessed
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time.sleep(1)
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self.pending_seconds = 1
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continue
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# Send module state to logs
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self.redis_logger.info(f'Module {self.module_name} initialized')
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def compute(self, message):
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obj_id = Item.get_item_id(message)
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obj_id = Item.get_item_id(message)
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# Do something with the message from the queue
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# Extract info from message
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content = Item.get_item_content(obj_id)
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content = Item.get_item_content(obj_id)
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date = Item.get_item_date(obj_id)
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date = Item.get_item_date(obj_id)
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for decoder in decoder_order: # add threshold and size limit
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for decoder in self.decoder_order: # add threshold and size limit
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# max execution time on regex
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# max execution time on regex
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signal.alarm(decoder['max_execution_time'])
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signal.alarm(decoder['max_execution_time'])
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try:
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try:
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encoded_list = re.findall(decoder['regex'], content)
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encoded_list = decoder['regex'].findall(content)
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except TimeoutException:
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except TimeoutException:
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encoded_list = []
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encoded_list = []
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p.incr_module_timeout_statistic() # add encoder type
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self.process.incr_module_timeout_statistic() # add encoder type
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print ("{0} processing timeout".format(obj_id))
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self.redis_logger.debug(f"{obj_id} processing timeout")
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continue
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continue
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else:
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else:
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signal.alarm(0)
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signal.alarm(0)
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if(len(encoded_list) > 0):
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if(len(encoded_list) > 0):
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content = decode_string(content, message, date, encoded_list, decoder['name'], decoder['encoded_min_size'])
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content = self.decode_string(content, message, date, encoded_list, decoder['name'], decoder['encoded_min_size'])
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def decode_string(self, content, item_id, item_date, encoded_list, decoder_name, encoded_min_size):
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find = False
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for encoded in encoded_list:
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if len(encoded) >= encoded_min_size:
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decoded_file = self.decoder_function[decoder_name](encoded)
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find = True
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sha1_string = sha1(decoded_file).hexdigest()
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mimetype = Decoded.get_file_mimetype(decoded_file)
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if not mimetype:
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self.redis_logger.debug(item_id)
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self.redis_logger.debug(sha1_string)
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raise Exception('Invalid mimetype')
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Decoded.save_decoded_file_content(sha1_string, decoded_file, item_date, mimetype=mimetype)
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Decoded.save_item_relationship(sha1_string, item_id)
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Decoded.create_decoder_matadata(sha1_string, item_id, decoder_name)
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#remove encoded from item content
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content = content.replace(encoded, '', 1)
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self.redis_logger.debug(f'{item_id} : {decoder_name} - {mimetype}')
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if(find):
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self.set_out_item(decoder_name, item_id)
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return content
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def set_out_item(self, decoder_name, item_id):
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self.redis_logger.warning(f'{decoder_name} decoded')
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# Send to duplicate
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self.process.populate_set_out(item_id, 'Duplicate')
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# Send to Tags
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msg = f'infoleak:automatic-detection="{decoder_name}";{item_id}'
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self.process.populate_set_out(msg, 'Tags')
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if __name__ == '__main__':
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module = Decoder()
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module.run()
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