Cybereason Inc.

Yonatan Striem-Amit

Samuel Curry

Uri Sternfeld

Joshua East Domagalski

Systems and methods are provided to determine a maliciousness level of an element using a hypergraph of neighbors. The method can include receiving the element; generating a hypergraph of neighbor target elements found in a database, the hypergraph comprising a set of nodes and a set of edges, wherein the set of nodes represents the neighbor target elements, and the set of edges represents connections between the neighbor target elements; classifying nodes and edges in the hypergraph; generating a maliciousness level profile for the element based on aggregation of nodes and edges in the hypergraph; linking information related to the element with the maliciousness level profile for the element; and performing an action based on a type of the element.

Systems and methods for asset-based severity scoring and protection therefrom

Techniques of operating a computer involve providing controls to an OS that monitor a rate at which commands in an operating system are performed. Along these lines, ransomware performs the OS commands it needs to control access to data files on a computer by performing those commands rapidly. In many cases, such rapid sequences of commands, e.g., read-copy-encrypt-delete, are performed much more rapidly than would be done by a typical user. Accordingly, the OS is then provided the capacity to monitor, e.g., a number of specified command sequences (e.g., read-copy-encrypt-delete) within some specified period of time (e.g., a minute, 5 minutes, an hour, or greater or less). If the number is greater than some threshold number, then the computer may take a remedial action such as issuing an alert to the user and/or limiting the rate at which the commands may be performed.

Detecting and stopping ransomware

A method, computer program product, system and apparatus for the prevention of RGA and DGA malware over an existing internet service is disclosed. The invention exploits the fact that when malware rapidly attempts to access many contact points, a malware is likely to need several attempts to find a current server. Software is installed on the individual endpoints in a network of internet services. The software monitors the websites or services and collects information about access attempts. The invention detects a series of failed attempts by the malware to access the service/website. These attempts can be accrued by being temporally linked (e.g., many attempts in a short time, many attempts consecutively), conceptually linked (e.g., similar addresses, similar attempts across multiple machines or time scales), higher than normal prevalence or other methods. The invention provides an indication of a malware attempt if enough failed attempts have accrued.

Prevention of rendezvous generation algorithm (RGA) and domain generation algorithm (DGA) malware over existing internet services

A method, computer program product, and apparatus for performing baseline calculations for firewalling in a computer network is disclosed. The method involves defining a reference group for an executed software program, measuring signals in the reference group, measuring signals of the program, computing a distance between the signals of the program and the signals of the reference group, and taking an action if the computed distance deviates from a norm mode. The distance can be computed using a similarity matrix or other method. Measuring the program comprises observing behaviors of the program, collecting and analyzing data, comparing the data to baselines of the reference group, and comparing the behaviors of the program across a previous execution of the program. In cases where a program is known to be malicious, a reference group is not needed and a sandbox can be tailored just by copying the environment of the actual system.

Baseline calculation for firewalling

A method, computer program product, and apparatus for implementing a distributed sandbox is disclosed. The method comprises discovering a machine with sufficient resources to run a virtual machine for a process, starting the process in a virtual machine on the discovered machine, if the virtual machine terminates, discovering another machine with sufficient resources to run a virtual machine for a process, and deciding if the process is benign when the virtual machine is finished. Control of the distributed sandbox is done by utilizing a broadcast network.

System resources for sandboxing

Techniques of protecting computers from malware involve migrating processes running applications from a first sandbox to a second sandbox. Along these lines, when a computer being protected from malware receives application code over a network, the computer generates a set of processes that runs the application code on a first machine acting as a sandbox. After the set of processes produce a first output on the first machine, the computer migrates the set of processes to a second machine acting as another sandbox. After the set of processes produces a second output on the second machine, the computer grants or denies access to the application code based the second output. Because migration can occur over the entire lifecycle of an application and migration is difficult to detect, migrating processes running malware makes it more difficult for the malware to evade detection.

Growing community of inventors

Somerville, MA, United States of America

Yonatan Striem-Amit