The exploit kit can have exploits for various versions of Flash and Internet Explorer for various versions of Windows. A victim could be using any version of Internet Explorer with a version of Flash player installed in it. The idea behind this is to try and apply all kinds of permutations and combinations of exploits on the victim. 3.1 Exploit kitsĪn exploit kit is a web application that serves a lot of exploits. Exploits are designed to bypass these defensive mechanisms too. We will be explaining these mechanisms in the Defense mechanism section in Chapter 8, Ransomware Detection and Prevention. Windows has developed several techniques, such as DEP and ASLR, to protect browsers and other software installed on it. A successful execution of an exploit is dependent upon the protection mechanisms employed by the operating system. An exploit that is intended to compromise Internet Explorer 6 may not harm an Internet Explorer 7 browser unless they have the same vulnerability. If the attack involves an exploit (refer to Chapter 1, Malware from Fun to Profit) related to Internet Explorer, the user using Firefox is not affected by that particular exploit.Īgain, exploits are specific to a version of software too. If an attacker uses the vulnerability in a browser, only the user with a certain browser is affected. These kinds of vulnerabilities are often termed as client-side vulnerabilities. An attacker uses an exploit (explained in section 4.11 Exploit in Chapter 1, Malware from Fun to Profit), intended for the particular vulnerability, to compromise the browser and execute malicious code, thus taking control of the system. A vulnerability can be present in the browser or its plugin. The Adobe Flash plugin extends the capability to view videos in the web browser. One can install plugins in browsers to extend their capabilities. Browsers have the ability to parse the code in web pages hosted on a website and display it to the user. The web server hosts websites while a browser acts as a client that consumes the web pages. Firefox, Internet Explorer, and Chrome are commonly used web browsers. Ī desktop user uses a web browser to browse a site. OWASP is an organization that lists the top vulnerabilities. You can find a list of some of the top web vulnerabilities at the Open Web Application Security Project ( OWASP) site. SQL injection attacks are aimed at manipulating the database whereas cross-site scripting attacks can embed malicious code in a website. SQL injection attacks and cross-site scripting attacks are the most popular attacks carried out on websites. He can embed URLs in the website that can redirect the victim to malicious sites which can contain ransomware or other malware. Also, an attacker can embed code in the web pages of the site. They can get the credentials of the users who have logged into the website. Attackers can use these vulnerabilities to compromise the website. We term these kinds of vulnerabilities as server-side vulnerabilities. A vulnerability in a web application, web page, database, or web server can expose the website to attack. Apache Tomcat, JBoss, and Microsoft IIS are some of the famous web servers. People can use these as templates and modify them to create their websites as per their requirements. Joomla, WordPress, and Drupal are some popular readily available web applications. A database for a website can be created using MySQL, Postgres SQL, and MongoDB. Web pages are created using PHP, HTML, Java, JavaScript, and so on. A web application is composed of web pages, databases, and several subcomponents. Attacks can leverage vulnerabilities in websites and browsers to execute the attack.Ī web application is hosted on a web server and, as a result, we get a website. Shut down the server and update the plesk and ubuntu? (this is a problem as we make use of a homebrew expand server, and expand does not support anything above plesk 9).Malware is also delivered through web attacks. Run clamAV (with no working heal function) and remove the files per hand all day long? Which of the following would be the best course of action?Ĭhange all the control panel and ftp details? The information below on wordpress was great, but its not only CMS sites that are infected. It has come to our attention when scanning some of our hosted server websites that they have been infected with Blackhole Exploit Kit (top dollar hacking program - )Ĭan someone advise on possible scripts to implement on an Ubuntu 8.04 LTS 64-bit machine to scan and remove these infected files or at least just mention if they have had previous experience with this and what method was used to get rid of the virus?
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