Posté par: igor51 le mars 24, 2017, 11:00:54
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At FireEye, we apply machine learning techniques to a variety of
security problems. Malware detection and categorization is a great use
of the technology, and we believe that it can also play a role in
security challenges that extend beyond malware.
In one such R&D effort, the Innovation & Custom Engineering
(ICE) team is utilizing machine learning to build statistical models
of relationships between entities. These models can then be used to
“connect the dots” by making predictions about relationships we
haven’t observed, or to spot anomalous relationships that don’t fit
expected patterns.
The most popular application of these algorithms is probably item
recommendation, where they are used to personalize our consumer
experiences in today’s online marketplace. There are also many
important security applications, such as analyzing relationships
between threat actors, TTPs, and their targets. Another is detecting
attacker activity by modeling relationships between users, machines,
applications, and network connections.
Figure 1 shows an example of how these algorithms can also be used
for clustering and visualization. This particular model has
automatically clustered several thousand machines into groups of
similar function, just by observing internal network connection behavior.
Figure 1. Visualization of model-based
clustering when trained on network connection relationships
We have created a tutorial that steps through building several types
of relational learning models using Python and Google’s new machine
learning framework, TensorFlow.