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Advanced Web Attacks And Exploitation 52


A cloud-based disaster recovery solution is an offsite recovery option that ensures high-availability of business-critical data by quickly restoring workloads after natural disasters, human error, cyberattacks, or hardware or server failures. Advanced Disaster Recovery for Acronis Cyber Protect Cloud provides an all-in-one backup and disaster recovery solution to help service providers minimize complexity while growing their margins.




Advanced Web Attacks And Exploitation 52



Acronis Cyber Protect Cloud includes best-of-breed anti-ransomware technology, strengthened with AI- and behavior-based detection focused on zero-day attacks. It also provides essential data loss prevention through device control.


The Advanced Security add-on extends endpoint protection with full-stack anti-malware to prevent a wider scope of threats, including web-based attacks and exploitation techniques. It increases the speed and accuracy of detection while ensuring zero-false positives. All collaborative applications benefit from prioritized protection, preventing exploitation of their processes. For more aggressive scanning, the anti-malware scans in the Acronis Cloud reduce the load on endpoints while ensuring no threat can reoccur.


The SQL database rule group contains rules to block request patternsassociated with exploitation of SQL databases, like SQL injection attacks.This can help prevent remote injection of unauthorized queries. Evaluatethis rule group for use if your application interfaces with an SQLdatabase.


The Linux operating system rule group contains rules that block request patternsassociated with the exploitation of vulnerabilities specific to Linux,including Linux-specific Local File Inclusion (LFI) attacks. This canhelp prevent attacks that expose file contents or run code for which theattacker should not have had access. You should evaluate this rule groupif any part of your application runs on Linux. You should use this rulegroup in conjunction with thePOSIX operating systemrule group.


The POSIX operating system rule group contains rules that block requestpatterns associated with the exploitation of vulnerabilities specific toPOSIX and POSIX-like operating systems, including Local File Inclusion (LFI)attacks. This can help prevent attacks that expose file contents or run codefor which the attacker should not have had access. You should evaluate thisrule group if any part of your application runs on a POSIX or POSIX-likeoperating system, including Linux, AIX, HP-UX, macOS, Solaris, FreeBSD, andOpenBSD.


The Windows operating system rule group contains rules that block request patternsassociated with the exploitation of vulnerabilities specific to Windows,like remote execution of PowerShell commands. This can help preventexploitation of vulnerabilities that permit an attacker to rununauthorized commands or run malicious code. Evaluate this rule group ifany part of your application runs on a Windows operating system.


The PHP application rule group contains rules that block request patterns associated withthe exploitation of vulnerabilities specific to the use of the PHPprogramming language, including injection of unsafe PHP functions. Thiscan help prevent exploitation of vulnerabilities that permit an attackerto remotely run code or commands for which they are not authorized.Evaluate this rule group if PHP is installed on any server with whichyour application interfaces.


The WordPress application rule group contains rules that block requestpatterns associated with the exploitation of vulnerabilities specific toWordPress sites. You should evaluate this rule group if you are runningWordPress. This rule group should be used in conjunction with theSQL databaseand PHP application rule groups.


In this blog post, I show you how to deploy CloudFront with AWS WAF and Route 53 to help protect dynamic web applications (with dynamic content such as a response to user input) against DDoS attacks. The steps shown in this post are key to implementing the overall approach described in AWS Best Practices for DDoS Resiliency and enable the built-in, managed DDoS protection service, AWS Shield.


To help keep your dynamic web applications available when they are under DDoS attack, the steps in this post enable AWS Shield Standard by configuring your applications behind CloudFront and Route 53. AWS Shield Standard protects your resources from common, frequently occurring network and transport layer DDoS attacks. Attack traffic can be geographically isolated and absorbed using the capacity in edge locations close to the source. Additionally, you can configure geographical restrictions to help block attacks originating from specific countries.


Route 53 DNS requests and subsequent application traffic routed through CloudFront are inspected inline. Always-on monitoring, anomaly detection, and mitigation against common infrastructure DDoS attacks such as SYN/ACK floods, UDP floods, and reflection attacks are built into both Route 53 and CloudFront. For a review of common DDoS attack vectors, see How to Help Prepare for DDoS Attacks by Reducing Your Attack Surface. When the SYN flood attack threshold is exceeded, SYN cookies are activated to avoid dropping connections from legitimate clients. Deterministic packet filtering drops malformed TCP packets and invalid DNS requests, only allowing traffic to pass that is valid for the service. Heuristics-based anomaly detection evaluates attributes such as type, source, and composition of traffic. Traffic is scored across many dimensions, and only the most suspicious traffic is dropped. This method allows you to avoid false positives while protecting application availability.


AWS WAF is a web application firewall that helps detect and mitigate web application layer DDoS attacks by inspecting traffic inline. Application layer DDoS attacks use well-formed but malicious requests to evade mitigation and consume application resources. You can define custom security rules (also called web ACLs) that contain a set of conditions, rules, and actions to block attacking traffic. After you define web ACLs, you can apply them to CloudFront distributions, and web ACLs are evaluated in the priority order you specified when you configured them. Real-time metrics and sampled web requests are provided for each web ACL.


You can configure AWS WAF whitelisting or blacklisting in conjunction with CloudFront geo restriction to prevent users in specific geographic locations from accessing your application. The AWS WAF API supports security automation such as blacklisting IP addresses that exceed request limits, which can be useful for mitigating HTTP flood attacks. Use the AWS WAF Security Automations Implementation Guide to implement rate-based blacklisting.


In addition to automated rate-based blacklisting to help protect against HTTP flood attacks, prebuilt AWS CloudFormation templates are available to simplify the configuration of AWS WAF for a proactive application-layer security defense. The following diagram provides an overview of CloudFormation template input into the creation of the CommonAttackProtection stack that includes AWS WAF web ACLs used to block, allow, or count requests that meet the criteria defined in each rule.


For dynamic web applications that have a high risk or history of frequent, complex, or high volume DDoS attacks, AWS Shield Advanced provides additional DDoS mitigation capacity, attack visibility, cost protection, and access to the AWS DDoS Response Team (DRT). For more information about AWS Shield Advanced pricing, see AWS Shield Advanced pricing. To activate advanced protection services, follow these steps:


In this blog post, I outline the steps to deploy CloudFront and configure Route 53 in front of your dynamic web application to leverage the global Amazon network of edge locations for DDoS resiliency. The post also provides guidance about enabling AWS WAF for application layer traffic monitoring and automated rules creation to block malicious traffic. I also cover the optional steps to activate AWS Shield Advanced, which helps build a more comprehensive defense against DDoS attacks for your dynamic web applications.


A lack of data protection, side effects of a global pandemic, and an increase in exploit sophistication have led to a huge incline in hacked and breached data from sources that are increasingly common in the workplace, such as mobile and IoT (internet of things) devices. On top of this, COVID-19 has ramped up remote workforces, making inroads for cyberattacks.


Some of the most common attacks include phishing, whaling, malware, social engineering, ransomware, and distributed denial of service (DDoS) attacks. Read more below to get a sense of the most common cyberattacks.


In general, DDoS attacks can be segregated by which layer of the Open Systems Interconnection (OSI) model they attack. They are most common at the Network (layer 3), Transport (Layer 4), Presentation (Layer 6) and Application (Layer 7) Layers.


Attacks at Layer 3 and 4, are typically categorized as Infrastructure layer attacks. These are also the most common type of DDoS attack and include vectors like synchronized (SYN) floods and other reflection attacks like User Datagram Packet (UDP) floods. These attacks are usually large in volume and aim to overload the capacity of the network or the application servers. But fortunately, these are also the type of attacks that have clear signatures and are easier to detect.


Attacks at Layer 6 and 7, are often categorized as Application layer attacks. While these attacks are less common, they also tend to be more sophisticated. These attacks are typically small in volume compared to the Infrastructure layer attacks but tend to focus on particular expensive parts of the application thereby making it unavailable for real users. For instance, a flood of HTTP requests to a login page, or an expensive search API, or even Wordpress XML-RPC floods (also known as Wordpress pingback attacks).


One of the first techniques to mitigate DDoS attacks is to minimize the surface area that can be attacked thereby limiting the options for attackers and allowing you to build protections in a single place. We want to ensure that we do not expose our application or resources to ports, protocols or applications from where they do not expect any communication. Thus, minimizing the possible points of attack and letting us concentrate our mitigation efforts. In some cases, you can do this by placing your computation resources behind Content Distribution Networks (CDNs) or Load Balancers and restricting direct Internet traffic to certain parts of your infrastructure like your database servers. In other cases, you can use firewalls or Access Control Lists (ACLs) to control what traffic reaches your applications.


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