Threat Prevention
Comprehensive Exploit, Malware, and Command-and-Control Protection for Your Network

To make matters worse, network security products are still using the same defensive strategies employed before the threat landscape evolved. Traffic is only inspected on certain ports and, while adding single-function devices to the defensive stack may help alleviate a particular problem, it results in poor visibility and performance. This has left a dangerous situation, where gaping holes are present in network defenses because security solutions are fractured and difficult to manage, while attackers are increasingly adept at penetrating them.

Purpose-built within Palo Alto Networks® Next-Generation Security Platform, the Threat Prevention service protects networks across different attack phases:

• Scans all traffic in full context of applications and users.
• Prevents threats at every stage of the cyberattack lifecycle.
• Single-pass scanning architecture allows for high throughput without sacrificing security.
• Daily, automatic updates for newly discovered threats, with preventions available in 300 seconds for zero-day malware and exploits through WildFire™ cloud-based threat analysis service.
• Revolutionary automated command-and-control signatures generated at machine scale and speed.

Enable the Application, Prevent the Threat

Applications are an integral part of how companies do business and, because of that, they've made themselves increasingly available to users by entering networks using encrypted channels through non-standard ports and by hopping from open port to open port to guarantee users always have access.

Unfortunately, advanced threats take advantage of the way in which applications make themselves available to users, leveraging them for a free ride into the network, undetected. They tunnel within applications, hide within SSL-encrypted traffic, and take advantage of unsuspecting targets to get a foothold within the network and execute malicious activity.

Palo Alto protect your network against these threats by providing multiple layers of prevention, confronting threats at each phase of the attack. In addition to traditional intrusion-prevention capabilities, they provide the unique ability to detect and block threats on any and all ports, instead of invoking signatures based on a limited set of predefined ports. By leveraging User-ID™ user identification technology and App-ID™ application identification technology within their next-generation firewall, which identify and add context to all traffic on all ports, the Threat Prevention engine never loses sight of the threat, regardless of the evasion technique.

Threat Prevention subscription includes intrusion prevention, network anti-malware, and command-and-control (CnC) protections.

Eliminate Threats at Every Phase

Heuristic-based analysis detects anomalous packet and traffic patterns, such as port scans, host sweeps and DDoS flooding attacks.

Other attack protection capabilities, such as blocking invalid or malformed packets, IP defragmentation, and TCP reassembly, are utilized for protection against evasion and obfuscation methods employed by attackers.

Easy-to-configure, custom vulnerability signatures allow you to tailor intrusion prevention capabilities to your network's unique needs.

Palo Alto Networks employs natively integrated defensive technologies to ensure that, when a threat evades one technology, another catches it. The key to effective protection is to use security features that are purpose-built to share information and provide context around both the traffic they're inspecting and the threats they're identifying and blocking.

Intrusion Prevention (IPS)

Threat-based protections detect and block exploit attempts and evasive techniques at both the network and application layers, including port scans, buffer overflows, remote code execution, protocol fragmentation and obfuscation. Protections are based on signature matching and anomaly detection, which decodes and analyzes protocols and uses the information learned to send alerts and block malicious traffic patterns. Stateful pattern matching detects attacks across multiple packets, taking into account arrival order and sequence, and making sure all allowed traffic is well-intentioned and devoid of evasion techniques.

• Protocol decoder-based analysis statefully decodes the protocol and then intelligently applies signatures to detect network and application exploits.
• Because there are many ways to exploit a single vulnerability, our intrusion prevention signatures are built based on the vulnerability itself, providing more thorough protection against a wide variety of exploits. A single signature can stop multiple exploit attempts on a known system or application vulnerability.
• Protocol anomaly-based protection detects non-RFCcompliant protocol usage, such as an overlong URI or FTP login.
• Easy-to-configure, custom vulnerability signatures allow us to tailor intrusion prevention capabilities to your network's unique needs.

Malware Protection

In-line malware protection blocks malware before it ever reaches the target host, through signatures that are based on payload, not hash. Malware protections from Palo Alto Networks block known malware and future variants of that malware, including those that haven't been seen in the wild yet. Our stream-based scanning engine protects the network without introducing significant latency, which is a serious drawback of network antivirus offerings that rely on proxybased scanning engines. The stream-based malware scanning inspects traffic as soon as the first packets of the file are received, eliminating threats as well as the performance issues associated with traditional, stand-alone solutions. Key anti-malware capabilities include:

• In-line, stream-based detection and prevention of malware hidden within compressed files and web content.
• Protection against payloads hidden within common file types, such as Microsoft® Office documents and PDFs.
• Updates from WildFire, ensuring protection against zero-day malware

Signatures for all types of malware are generated directly from billions of samples collected by Palo Alto Networks, including previously unknown malware sent to WildFire, our Unit 42 threat research team, and other third-party research and technology partners around the world.

Command-and-Control (Spyware) Protection

After initial infection, attackers will communicate with the host machine through a command-and-control (CnC) channel, using it to pull down additional malware, issue further instructions, and steal data. Our CnC protections hone in on those unauthorised communication channels and cut them off by blocking outbound requests to malicious domains and from known CnC toolkits installed on infected devices. Palo Alto Networks goes beyond standard automation of CnC signatures based on URLs and domains. We automatically generate pattern-based CnC signatures - delivering researcher-grade CnC signatures at machine speed and scale.

Scan for All Threats in a Single Pass

The Palo Alto Networks Threat Prevention engine represents an industry first by inspecting and classifying traffic and detecting and blocking both malware and vulnerability exploits in a single pass. Traditional threat prevention technologies require two or more scanning engines, adding significant latency and dramatically slowing throughput performance. We use a uniform signature format for all threats to ensure speedy processing by performing all analysis in a single, integrated scan, eliminating redundant processes common to solutions that use multiple scanning engines.

Threat Prevention technology combs through each packet as it passes through the platform, looking closely at byte sequences within both the packet header and payload. From this analysis, we're able to identify important details about that packet, including the application used, its source and destination, whether the protocol is RFC-compliant, and whether the payload contains an exploit or malicious code. Beyond individual packets, we also analyze the context provided by the arrival order and sequence of multiple packets to catch and prevent evasive techniques. All of this analysis and signature matching happens within one scan, so your network traffic remains as fast as you need it to be.

Threat Prevention Subscription Integration With WildFire

Organizations can extend their protection for zero-day malware and exploits with the WildFire service. WildFire is the industry's most advanced analysis and prevention engine for highly evasive zero-day malware and exploits. The cloudbased service employs a unique multi-technique approach that combines dynamic and static analysis, innovative machine learning techniques, and a groundbreaking bare metal analysis environment to detect and prevent even the most evasive threats.

Attack Surface Reduction

SSL Decryption
Nearly 40 percent of enterprise network traffic is encrypted with SSL, which leaves a gaping hole in network defenses if it's not decrypted and scanned for threats. Our platform has built-in SSL decryption, which can be used selectively to decrypt inbound and outbound SSL traffic. After traffic is decrypted and confirmed as safe, it's re-encrypted and allowed through to its destination.

File Blocking
Around 90 percent of malicious files used in spear phishing attacks are executables. That, combined with the fact that nearly 60 percent of security incidents are the result of employee negligence, means that your users may not know what's safe and what isn't. Reduce the likelihood of a malware infection by preventing dangerous file types known to hide malware, such as executables, from entering your network. File blocking functionality can be combined with User-ID to block unnecessary files based on users' job roles, making sure all users have access to the files they need and providing you with a granular way to reduce your exposure to risk in a way that makes sense for the diverse requirements of your organization. You can further decrease the number of attack opportunities by sending all allowed files to WildFire for analysis to determine if they contain zero-day malware.

Drive-by Download Protection
Unsuspecting users can inadvertently download malware merely by visiting their favorite web page. Often the user, or even the owner, of the website may be unaware that the site has been compromised. Our Threat Prevention technology identifies potentially dangerous downloads and sends a warning to the user to ensure that the download is intended and approved. Prevent attacks from new and rapidly changing domains by tying this feature to URL filtering and file blocking policies.

Easy and Accurate Mitigation

DNS Sinkhole
Our CnC protection goes a step further by providing sinkhole capabilities for outbound requests to malicious DNS entries, preventing exfiltration and accurately identifying the victim. Configure the sinkhole so that any outbound request to a malicious domain or IP address is instead redirected to one of your network's internal IP addresses. This effectively blocks CnC communication, preventing those requests from ever leaving the network. A report of the hosts on your network making those requests is compiled, even though those hosts sit behind the DNS server. Incident response teams have a daily list of compromised machines on which to act, without the added stress of remediation crunch-time because communications with the attacker have already been cut off

Automated Correlation Objects
Our Threat Prevention technology includes the ability to identify the presence of advanced threats through the monitoring and correlation of network traffic and threat logs, so you can quickly identify infected users and analyze strange behavior patterns. The correlation objects leverage threat research from Unit 42 and unknown threat analysis from WildFire and User-ID to correlate traffic anomalies and indicators of compromise, so that devices on your network that are infected can be quickly and accurately identified.

Leverage Global Threat Intelligence to Prevent Attacks

Detailed logs of all threats aren't merely housed within the same management interface but shared among all prevention mechanisms to provide context. We leverage global threat intelligence through WildFire to automatically discover unknown malware and deliver protections to our entire customer base, keeping them continuously secured against the latest advanced threats.

Passive DNS Network

Protect your organization against rapidly evolving malware networks and malicious websites by leveraging Palo Alto Networks DNS-based analysis. Benefit from a vast network of intelligence by enabling passive DNS monitoring, which feeds into our database of malicious domains and is then used in generating protections across our global customer base.

Unit 42 Threat Research

The Palo Alto Networks threat research team, Unit 42, applies human intelligence to identify critical zero-day vulnerabilities in Microsoft®, Adobe®, Apple®, Android™ and other ecosystems. By proactively identifying these vulnerabilities, developing protections for our customers, and sharing the information with the security community, we are removing weapons used by attackers to threaten users and compromise enterprise, government and service provider networks.

 

Download the Palo Alto Networks Threat Prevention Datasheet (PDF).