Microsoft Technology Licensing, LLC

Itai Grady

Tal Arieh Be'ery

Idan Plotnik

Michael Dubinsky

Sivan Krigsman

Tom Jurgenson

Benny Lakunishok

Amit Rosenzweig

Gil David

Yaron Kaner

Systems and methods for determining a user's presence on a network of an enterprise are provided. Traffic is collected to a network from devices and, over a period of time, login and logoff information from a user is determined from the collected network traffic. Network sessions are determined from a user's login and logoff information and timetable is generated specific to the user that contains the network sessions. The time table identifies when the user was active and when the user was not active based on the login and logoff information and, therefore, present at a particular location over a period of time.

Establishing user's presence on internal on-premises network over time using network signals

The threat of malicious parties exposing users' credentials from one system and applying the exposed credentials to a different system to gain unauthorized access is addressed in the present disclosure by systems and methods to preemptively and reactively mitigate the risk of users reusing passwords between systems. A security device passively monitors traffic comprising authorization requests within a network to reactively identify an ongoing attack based on its use of exposed credentials in the authorization request and identifies accounts that are vulnerable to attacks using exposed credentials by actively attempting to log into those accounts with exposed passwords from other networks. The systems and methods reduce the number of false positives associated with attack identification and strengthens the network against potential attacks, thus improving the network's security and reducing the amount of resources needed to securely manage the network.

Detecting attacks using compromised credentials via internal network monitoring

According to examples, an apparatus for managing alerts pertaining to additions of users to a user group in a computer network may include a processor and a memory, which may have stored thereon machine readable instructions that are to cause the processor to, during a learning period, identify an entity that added a user to the user group during the learning period and enter an identification of the identified entity into an allowed entity list for the user group. Following the learning period, the instructions are to cause the processor to identify a user addition event that indicates that an adding entity added another user to the user group, determine whether the adding entity is in the allowed entity list, and manage issuance of an alert regarding the user addition event based upon whether the adding entity is in the allowed entity list to reduce a number of issued alerts.

Managing alerts regarding additions to user groups

There is provided a method for detecting a malicious attempt to access a service providing server using credentials of a client terminal in a network, the method performed by a malicious event detection server analyzing packets transmitted over the network, comprising: analyzing at least one login-credential associated with an attempt to obtain authentication to access the service providing server to determine whether the login-credential matches an invalid login-credential included in a set of honeytoken-credentials, wherein the set of honeytoken-credentials is stored on a local memory of the client terminal, wherein the set of honeytoken-credentials includes the invalid login-credential and a valid login-credential, wherein the invalid login-credential is invalid for authentication of the client terminal to access the service providing server and the valid login-credential is valid for authentication of the client terminal to access the service providing server; and identifying a malicious event when the login-credential matches the invalid login-credential.

Systems and methods for the detection of advanced attackers using client side honeytokens

Monitoring of a life cycle of a connection of a network client device to a network via monitoring time synchronization traffic flowing between one or more network client devices and a time server in a network is provided. A system for monitoring a life cycle of a connection of a network client device to a network includes a security device operable to identify a true identity of the one or more network client devices, identify a network client device's connections to and disconnections from the network, determine which network client devices have been associated with a particular internet protocol (IP) address, and generate an output of connection and disconnection information associated with a network client device. In some examples, the security device is operable to detect anomalies and malicious patterns in the network.

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Ramat Hasharon, Israel

Itai Grady