{"id":46,"date":"2023-02-01T17:10:26","date_gmt":"2023-02-01T11:40:26","guid":{"rendered":"https:\/\/hackzone.in\/blog\/?p=46"},"modified":"2023-02-06T18:09:03","modified_gmt":"2023-02-06T12:39:03","slug":"how-to-detect-malware-with-suricata-rules","status":"publish","type":"post","link":"https:\/\/hackzone.in\/blog\/how-to-detect-malware-with-suricata-rules\/","title":{"rendered":"How To Detect Malware With Suricata Rules."},"content":{"rendered":"\n<pre class=\"wp-block-preformatted\">Suricata is a highly efficient, open-source, and multi-platform network security engine that incorporates advanced Intrusion Detection System (IDS), Intrusion Prevention System (IPS), and Network Security Monitoring (NSM) technologies. Developed and maintained by the Open Information Security Foundation (OISF) community since 2009, Suricata offers a comprehensive solution for detecting and preventing network security threats.<\/pre>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"430\" src=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/shot1.png\" alt=\"\" class=\"wp-image-47\" srcset=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/shot1.png 1024w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/shot1-300x126.png 300w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/shot1-768x323.png 768w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/shot1-900x378.png 900w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>As we already explained in&nbsp;this&nbsp;article, an IDS is a passive system that is responsible for monitoring the behavior of a network to detect and report on possible unauthorized intrusions, while an IPS is an active system that works as an extension of the IDS and that , in addition to sending alerts on detections, it can also block malicious activity within the network \u2013 such as brute force attacks, DDoS, or attacks that seek to exploit vulnerabilities \u2013 and create a log with the intrusion.&nbsp;All this from the traffic, the file signatures, and the heuristic analysis of the flow.&nbsp;Additionally, IPS allows adding policies and restricting access to users and \/ or even applications.<\/p>\n\n\n\n<p>That said, the most common uses for Suricata are related to scanning network traffic and analyzing traffic logs within a sandbox or sandbox environment (such as running malware).&nbsp;However, we can also use this tool for creating rules in order to classify malware.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Testing Meerkat<\/h2>\n\n\n\n<p>Next, we are going to see a simple example of how to use&nbsp;Suricata&nbsp;for malware classification.<\/p>\n\n\n\n<p>Suppose we have a machine destined to perform dynamic analysis of malware samples, we could add different Suricata rules to be able to classify the type of malware that is running according to the traffic.<\/p>\n\n\n\n<p>In this case, while a sample of the<strong>&nbsp;Trickbot&nbsp;banking Trojan<\/strong> is running on the network&nbsp;, a<strong>&nbsp;.pcap<\/strong>&nbsp;file is generated&nbsp;with information on the behavior of the traffic.<\/p>\n\n\n\n<p>Through the network flow generated by the malware and knowing its behavior, we could create some rules in Suricata in the<strong>&nbsp;\/etc\/suricata\/<\/strong> <\/p>\n\n\n\n<p>rules&nbsp;folder&nbsp;:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"151\" src=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short2.png\" alt=\"\" class=\"wp-image-48\" srcset=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short2.png 940w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short2-300x48.png 300w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short2-768x123.png 768w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short2-900x145.png 900w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><figcaption class=\"wp-element-caption\">In this Image you can see the list of some rules that come by default when installing Suricata.<\/figcaption><\/figure>\n\n\n\n<p>Before proceeding with the generation of the rule to detect Trickbot, we will see a short description of the&nbsp;basic fields&nbsp;to generate rules in Suricata:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes has-large-font-size\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Action<\/strong> <\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Header<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Rule Options<\/strong><\/td><td><\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Action: corresponds to the action (drop, alert, etc.) that Suricata will perform when the rule is identified in the network flow.<\/li>\n\n\n\n<li>Header: this section corresponds to the specific network flow to be analyzed.&nbsp;From origin to destination.&nbsp;With the word \u201cany\u201d we can tell Meerkat that all ports will be analyzed.<\/li>\n\n\n\n<li>Rule: rule to implement to detect malware in our case.&nbsp;Within this field there are keywords that help us create our rule:<ul><li>Msg: alert message that Suricata will issue.<\/li><\/ul><ul><li>flow: network flow.<\/li><\/ul><ul><li>Content: contains the character string to be searched within the traffic.<\/li><\/ul><ul><li>Reference: contains references, in this case we put a verification MD5 hash of a Trickbot sample.<\/li><\/ul><ul><li>Sid: ID of the identified rule.<\/li><\/ul><ul><li>Rev: version of the rule.<\/li><\/ul>\n<ul class=\"wp-block-list\">\n<li>Classtype: provides information on the classification of rules and alerts.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Taking as an example the&nbsp;rule for Trickbot malware, <strong>let\u2019s&nbsp;proceed to add the Suricata rule in the&nbsp;\/ etc \/ suricata \/ rules directory<\/strong>&nbsp;for its detection: We save our rule for Trickbot taken from the aforementioned repository<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"166\" src=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short3.png\" alt=\"\" class=\"wp-image-49\" srcset=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short3.png 940w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short3-300x53.png 300w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short3-768x136.png 768w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short3-900x159.png 900w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><figcaption class=\"wp-element-caption\">Now we go on to analyze the traffic with Suricata by executing the command:<\/figcaption><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo suricata -c \/etc\/suricata\/suricata.yaml -r &#91;file.pcap]:<\/code><\/pre>\n\n\n\n<p>The previous statement generates four files:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"589\" height=\"125\" src=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short4.png\" alt=\"\" class=\"wp-image-50\" srcset=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short4.png 589w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short4-300x64.png 300w\" sizes=\"auto, (max-width: 589px) 100vw, 589px\" \/><\/figure>\n\n\n\n<p>The&nbsp;eve.json&nbsp;file&nbsp;is the file that interests us the most at the moment, since it is the output file that provides information about alerts, anomalies, metadata, and even information about specific files and logs:<\/p>\n\n\n\n<p>If we search for the name of the message&nbsp;<em>\u201c<\/em>&nbsp;Trickbot&nbsp;<em>\u201c<\/em>&nbsp;with the command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>grep \u201cTrickbot\u201d eve.json<\/code><\/pre>\n\n\n\n<p>We will see that our rule was able to detect the malicious file as Trickbot.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"223\" src=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short5.png\" alt=\"\" class=\"wp-image-51\" srcset=\"https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short5.png 940w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short5-300x71.png 300w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short5-768x182.png 768w, https:\/\/hackzone.in\/blog\/wp-content\/uploads\/2023\/02\/short5-900x214.png 900w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/figure>\n\n\n\n<p>To close this proof of concept it is important to mention that Suricata is a very useful tool to perform&nbsp;Threat Hunting&nbsp;.&nbsp;<strong>It is capable of identifying network protocols (TPC, UDP, HTTP, ICMP, etc.) <\/strong>enabling real-time control of the traffic generated on our network and controlling the presence of possible malicious codes.&nbsp;The latter can be done through <strong>MD5<\/strong> checks, as we saw in the Trickbot rule.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">On the other hand, we also recommend reviewing the Suricata Open Source repository of&nbsp;Emerging Threats&nbsp;rules&nbsp;, where you can find rules that detect new threats.<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Suricata is a highly effective open-source network security engine that incorporates advanced Intrusion Detection System (IDS) and Intrusion Prevention System (IPS) technologies. This solution offers a comprehensive approach to detecting and preventing network security threats, making it an essential tool for businesses and organizations of all sizes. By using Suricata rules, it is possible to detect malware in real-time and take necessary actions to prevent further damage to your network. In this article, we will discuss the steps to detect malware with Suricata rules, including the installation and configuration of Suricata, updating the rules, starting the intrusion detection system, and monitoring the logs for detections. By following these steps, you can effectively protect your network from malware and other security threats.<\/p>\n","protected":false},"author":1,"featured_media":83,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,9,13,6,7,8],"tags":[29,24,25,21,22,19,20,27,23,28,26,18],"class_list":["post-46","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity","category-ddos","category-malware","category-network-security","category-ransomware","category-trojan","tag-cybersecurity","tag-file-signatures","tag-heuristic-analysis","tag-intrusion-detection-system","tag-intrusion-prevention-system","tag-malware-detection","tag-network-security","tag-network-threats","tag-network-traffic-analysis","tag-open-source-security-solutions","tag-security-policies","tag-suricata"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How To Detect Malware With Suricata Rules. - Hackzone Cyber Security Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hackzone.in\/blog\/how-to-detect-malware-with-suricata-rules\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How To Detect Malware With Suricata Rules. - Hackzone Cyber Security Blog\" \/>\n<meta property=\"og:description\" content=\"Suricata is a highly effective open-source network security engine that incorporates advanced Intrusion Detection System (IDS) and Intrusion Prevention System (IPS) technologies. This solution offers a comprehensive approach to detecting and preventing network security threats, making it an essential tool for businesses and organizations of all sizes. By using Suricata rules, it is possible to detect malware in real-time and take necessary actions to prevent further damage to your network. In this article, we will discuss the steps to detect malware with Suricata rules, including the installation and configuration of Suricata, updating the rules, starting the intrusion detection system, and monitoring the logs for detections. 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This solution offers a comprehensive approach to detecting and preventing network security threats, making it an essential tool for businesses and organizations of all sizes. By using Suricata rules, it is possible to detect malware in real-time and take necessary actions to prevent further damage to your network. In this article, we will discuss the steps to detect malware with Suricata rules, including the installation and configuration of Suricata, updating the rules, starting the intrusion detection system, and monitoring the logs for detections. 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