mirror of https://github.com/CIRCL/AIL-framework
137 lines
3.7 KiB
Python
Executable File
137 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*-coding:UTF-8 -*
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"""
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Base64 module
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Dectect Base64 and decode it
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"""
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import time
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import os
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import datetime
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from pubsublogger import publisher
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from Helper import Process
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from packages import Paste
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import re
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import base64
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from hashlib import sha1
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import magic
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import json
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import signal
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class TimeoutException(Exception):
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pass
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def timeout_handler(signum, frame):
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raise TimeoutException
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signal.signal(signal.SIGALRM, timeout_handler)
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def search_base64(content, message):
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find = False
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base64_list = re.findall(regex_base64, content)
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if(len(base64_list) > 0):
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for b64 in base64_list:
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if len(b64) >= 40 :
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decode = base64.b64decode(b64)
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type = magic.from_buffer(decode, mime=True)
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#print(type)
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#print(decode)
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find = True
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hash = sha1(decode).hexdigest()
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data = {}
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data['name'] = hash
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data['date'] = datetime.datetime.now().strftime("%d/%m/%y")
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data['origin'] = message
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data['estimated type'] = type
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json_data = json.dumps(data)
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save_base64_as_file(decode, type, hash, json_data)
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print('found {} '.format(type))
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if(find):
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publisher.warning('base64 decoded')
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#Send to duplicate
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p.populate_set_out(message, 'Duplicate')
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#send to Browse_warning_paste
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msg = ('base64;{}'.format(message))
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p.populate_set_out( msg, 'alertHandler')
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def save_base64_as_file(decode, type, hash, json_data):
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filename_b64 = os.path.join(os.environ['AIL_HOME'],
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p.config.get("Directories", "base64"), type, hash[:2], hash)
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filename_json = os.path.join(os.environ['AIL_HOME'],
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p.config.get("Directories", "base64"), type, hash[:2], hash + '.json')
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dirname = os.path.dirname(filename_b64)
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if not os.path.exists(dirname):
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os.makedirs(dirname)
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with open(filename_b64, 'wb') as f:
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f.write(decode)
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with open(filename_json, 'w') as f:
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f.write(json_data)
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if __name__ == '__main__':
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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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# Port of the redis instance used by pubsublogger
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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 = 'Base64'
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# Setup the I/O queues
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p = Process(config_section)
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max_execution_time = p.config.getint("Base64", "max_execution_time")
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# Sent to the logging a description of the module
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publisher.info("Base64 started")
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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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re.compile(regex_base64)
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# Endless loop getting messages from the input queue
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while True:
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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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time.sleep(1)
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continue
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filename = message
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paste = Paste.Paste(filename)
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signal.alarm(max_execution_time)
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try:
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# Do something with the message from the queue
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#print(filename)
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content = paste.get_p_content()
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search_base64(content,message)
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# (Optional) Send that thing to the next queue
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#p.populate_set_out(something_has_been_done)
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except TimeoutException:
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print ("{0} processing timeout".format(paste.p_path))
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continue
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else:
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signal.alarm(0)
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