ma_cisco_malware/models/flat_2.py

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from collections import namedtuple
import keras
from keras.activations import elu
from keras.engine import Input, Model as KerasModel
2017-10-05 15:26:53 +02:00
from keras.layers import BatchNormalization, Conv1D, Dense, Dropout, Embedding, GlobalAveragePooling1D, \
GlobalMaxPooling1D, TimeDistributed
import dataset
def selu(x):
"""Scaled Exponential Linear Unit. (Klambauer et al., 2017)
# Arguments
x: A tensor or variable to compute the activation function for.
# References
- [Self-Normalizing Neural Networks](https://arxiv.org/abs/1706.02515)
# copied from keras.io
"""
alpha = 1.6732632423543772848170429916717
scale = 1.0507009873554804934193349852946
return scale * elu(x, alpha)
Model = namedtuple("Model", ["in_domains", "in_flows", "out_client", "out_server"])
def get_embedding(embedding_size, input_length, filter_size, kernel_size, hidden_dims, drop_out=0.5) -> KerasModel:
x = y = Input(shape=(input_length,))
y = Embedding(input_dim=dataset.get_vocab_size(), output_dim=embedding_size)(y)
y = Conv1D(filter_size,
kernel_size,
activation=selu)(y)
y = GlobalAveragePooling1D()(y)
y = Dense(hidden_dims, activation=selu)(y)
return KerasModel(x, y)
def get_model(cnnDropout, flow_features, domain_features, window_size, domain_length, cnn_dims, kernel_size,
dense_dim, cnn, model_output="both") -> Model:
ipt_domains = Input(shape=(window_size, domain_length), name="ipt_domains")
encoded = TimeDistributed(cnn, name="domain_cnn")(ipt_domains)
ipt_flows = Input(shape=(window_size, flow_features), name="ipt_flows")
y = BatchNormalization()(ipt_flows)
y = Dense(dense_dim, activation=selu)(y)
merged = keras.layers.concatenate([encoded, y], -1)
# CNN processing a small slides of flow windows
y = Conv1D(cnn_dims,
kernel_size,
activation=selu,
input_shape=(window_size, domain_features + flow_features))(merged)
# remove temporal dimension by global max pooling
y = GlobalMaxPooling1D()(y)
y = Dropout(cnnDropout)(y)
y = Dense(dense_dim, activation=selu)(y)
out_client = Dense(1, activation='sigmoid', name="client")(y)
out_server = Dense(1, activation='sigmoid', name="server")(y)
return Model(ipt_domains, ipt_flows, out_client, out_server)
def get_new_model(dropout, flow_features, domain_features, window_size, domain_length, cnn_dims, kernel_size,
dense_dim, cnn, model_output="both") -> Model:
ipt_domains = Input(shape=(window_size, domain_length), name="ipt_domains")
ipt_flows = Input(shape=(window_size, flow_features), name="ipt_flows")
encoded = TimeDistributed(cnn, name="domain_cnn")(ipt_domains)
merged = keras.layers.concatenate([encoded, ipt_flows], -1)
y = Dense(dense_dim, activation=selu)(merged)
out_server = Dense(1, activation="sigmoid", name="server")(y)
merged = keras.layers.concatenate([merged, y], -1)
# CNN processing a small slides of flow windows
y = Conv1D(filters=cnn_dims,
kernel_size=kernel_size,
activation=selu,
padding="same",
input_shape=(window_size, domain_features + flow_features))(merged)
# remove temporal dimension by global max pooling
y = GlobalMaxPooling1D()(y)
y = Dropout(dropout)(y)
y = Dense(dense_dim,
activation=selu,
name="dense_client")(y)
out_client = Dense(1, activation='sigmoid', name="client")(y)
return Model(ipt_domains, ipt_flows, out_client, out_server)