Palo Alto Networks, Inc.

Suiqiang Deng

Ho Yu Lam

Martin Walter

Song Wang

Taylor Ettema

Robert Earle Ashley

Robert Tesh

Xuanyu Jin

William Redington Hewlett, Ii

Sheng Yang

Wilson Xu

Michael Soren Jacobsen

Zhipu Jin

Charles Bransi

Jiangxia Liu

Detection of malicious files is disclosed. A set comprising a plurality of sample classification models is received and stored. A determination is made that n-gram analysis should be performed on a sequence of received packets associated with a received file. Performing the n-gram analysis includes using a determined filetype associated with the sequence of received packets to select at least one stored sample classification model included in the set for use in performing the n-gram analysis. A determination is made that the received file is malicious based at least in part on the n-gram analysis of the sequence of received packets. In response to determining that the file is malicious, propagation of the received file is prevented.

Inline malware detection

Techniques for a security platform with external inline processing of assembled selected traffic are disclosed. In some embodiments, a system/method/computer program product for providing a security platform with external inline processing of assembled selected traffic includes monitoring network traffic of a session at a security platform; selecting a subset of the monitored network traffic associated with the session to send to a cloud-based security service for analysis based on a security policy, wherein the selected subset of the monitored network traffic is proxied to the cloud-based security service; and receiving, from the cloud-based security service, results of the analysis based on the security policy, and performing a responsive action based on the results of the analysis based on the security policy.

Security platform with external inline processing of assembled selected traffic

Generating models usable by data appliances to perform inline malware analysis is disclosed. A set of features, including a plurality of n-grams, extracted from a set of files is received. A reduced set of features is determined that includes at least some of the plurality of n-grams. The reduced set of features is used to generate a model usable by a data appliance to perform inline malware analysis.

Generating models for performing inline malware detection

Detection of malicious files is disclosed. A set comprising one or more sample classification models is stored on a networked device. N-gram analysis is performed on a sequence of received packets associated with a received file. Performing the n-gram analysis includes using at least one stored sample classification model. A determination is made that the received file is malicious based at least in part on the n-gram analysis of the sequence of received packets. In response to determining that the file is malicious, propagation of the received file is prevented.

A request to establish a session with a first server is received from a client device. The first server is associated with a first hostname, and the request includes information identifying a second hostname purported to correspond to the first server. A Domain Name System (DNS) lookup using the second hostname is performed. A determination that the second hostname was spoofed by the client device is determined based on a response to the DNS lookup. In response to the determination being made that the request received from the client device includes the spoofed second hostname, a determination that the client device has injected or overridden at least one of an HTTP Host header and a Server Name Indicator in the request is made, and an action to take with respect to the client device is determined.

Hostname validation and policy evasion prevention

Enforcing a policy is described. A mapping between an IP address of a device and a user identity is identified at a first appliance, at least in part by correlating event information. The mapping is transmitted to a second appliance. A policy is applied by the second appliance to the device based at least in part on the user identity.

User-ID information propagation among appliances

A request to access a network resource is received from a client device. The request includes a purported hostname of the network resource. A Domain Name System (DNS) lookup of the purported hostname is performed. A result of the lookup is used in making a determination that the request received from the client device is invalid. In response to the determination being made that the request received from the client device is invalid, an action to take with respect to the client device is determined.

Techniques for credentials enforcement using a firewall are disclosed. In some embodiments, a system, process, and/or computer program product for enforcement using a firewall includes storing a plurality of user credentials at a network device; monitoring network traffic at the network device to determine if there is a match with one or more of the plurality of user credentials; and performing an action if the match is determined.

Credentials enforcement using a firewall

Techniques for an efficient and secure store for credentials enforcement using a firewall are disclosed. In some embodiments, a system, process, and/or computer program product for an efficient and secure store for credentials enforcement using a firewall includes receiving a space-efficient and secure data structure, such as bloom filter, from an agent executed on an authentication server, in which the bloom filter is generated by the agent based on a transformation of a plurality of user credentials extracted from the authentication server and/or intercepted at the authentication server; storing the bloom filter on the network device (e.g., in a cache on the network device); and monitoring network traffic at the network device to perform credentials enforcement using the bloom filter.

Efficient and secure user credential store for credentials enforcement using a firewall

Policy enforcement is disclosed. A first identity and second notification are respectively received from a network device at different first and second times. In response to the receipt of the second identity notification, a determination is made that an IP address associated with the network advice has changed from a first IP address to a second IP address. A mapping between an identifier associated with the device and the first IP address is updated to a mapping between the identifier and the second IP address. A policy is updated based on the updated mapping.

Dynamic address policy enforcement

Policy enforcement is disclosed. An identity notification is received from a network device. The identity notification is usable to determine a user identifier associated with the network device. The identity notification is also usable to determine an IP address associated with the network device. A policy is updated based on the received identity notification.

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Fremont, CA, United States of America

Suiqiang Deng