Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects the delivery of potentially malicious Flash (.swf) or Java (.jar, .class) files over HTTP. It specifically looks for HTTP responses where the URI ends with one of these extensions and the file data begins with 'MZ', which is the magic number for Windows executable files. This combination suggests an attempt to disguise an executable as a Flash or Java file, likely for exploit delivery.
This rule detects attempts to exploit the Zerologon (CVE-2020-1472) vulnerability, a critical privilege escalation flaw in Microsoft's Netlogon Remote Protocol. It specifically looks for network traffic on TCP port 445 (SMB) containing the 'NetrServerAuthenticate3' function call with a specific sequence of null bytes, which is indicative of an unauthenticated Netlogon session setup without signing and sealing, a key characteristic of the Zerologon exploit.
This rule detects the delivery of a kernel exploit via HTTP. It specifically looks for HTTP responses (flow:to_client) containing a file with the 'MZ' header (indicating a Windows executable) and the string 'exploit' (case-insensitive) in the HTTP URI. This combination suggests an attempt to deliver a malicious executable, potentially a kernel exploit, to a client system.
This rule detects exploitation attempts targeting the Spring4Shell vulnerability (CVE-2022-22965). It specifically looks for HTTP requests containing the string "class.module.classLoader" in the URI, which is a known indicator of this RCE exploitation attempt.
This rule detects an attempted pre-authentication Remote Code Execution (RCE) exploit against the Remote Desktop Protocol (RDP) service, commonly known as 'BlueKeep'. It specifically looks for a sequence of bytes within the RDP traffic on port 3389, indicating a potential exploit attempt.
This rule detects the download of known exploit kits by inspecting HTTP URI patterns. It specifically looks for the strings 'rig', 'fallout', 'spelevo', or 'purplefox' followed by 'kit' (case-insensitive) within the HTTP URI. The detection is triggered on traffic flowing to the client that is part of an established connection.
This rule detects attempts to exploit Apache Struts OGNL (Object-Graph Navigation Language) injection vulnerabilities. It specifically looks for HTTP requests where the 'Content-Type' header contains the sequence '%{', which is characteristic of OGNL expressions used in injection attacks against Apache Struts.
EternalBlue SMB Exploit Attempt
Suricata
This rule detects attempts to exploit the EternalBlue vulnerability over SMB (Server Message Block) protocol. It specifically looks for a sequence of bytes indicative of the exploit payload within the SMB traffic.
This rule detects attempts to exploit the Log4Shell vulnerability (CVE-2021-44228) by looking for the specific JNDI injection string "${jndi:" within HTTP URI requests. This pattern is commonly used by attackers to trigger remote code execution in vulnerable Log4j versions.
This rule detects network traffic to port 88 (Kerberos) that exhibits characteristics of a vulnerability exploit for credential access. Specifically, it triggers an alert if there are 30 or more TCP connections to port 88 on the HOME_NET within a 5-second window from a single source IP address, indicating a potential brute-force or rapid credential access attempt against a Kerberos service.
This rule detects attempts to exploit the Heartbleed vulnerability (CVE-2014-0160) by identifying a specific pattern in TLS heartbeat requests. It looks for a TLS heartbeat request with a type of 0x18 (heartbeat request) and a length greater than 3 bytes, which is indicative of an oversized heartbeat request used in the Heartbleed exploit.
This rule detects attempts to exploit the Shellshock Bash vulnerability via CGI. It specifically looks for HTTP requests containing the string "() {" in the header, which is characteristic of the Shellshock exploit payload used to inject arbitrary commands.
This rule detects the delivery of a malicious document exploiting CVE-2021-40444, an MSHTML remote code execution vulnerability. It specifically looks for HTTP traffic containing a Word document (word/document.xml) with embedded relationships that include an HTTP reference, indicating an attempt to fetch remote content, which is characteristic of the exploit delivery mechanism.
This rule detects attempts to exploit the PrintNightmare vulnerability over SMB. It specifically looks for network traffic on port 445 (SMB) containing the strings "spoolss" and "RpcAddPrinterDriverEx" in a case-insensitive manner, indicating an attempt to leverage the Print Spooler service for privilege escalation.
This rule detects attempts to exploit applications for denial of service by looking for the string "${jndi:" (case-insensitive) within the HTTP URI. This pattern is commonly associated with JNDI injection vulnerabilities, which can be leveraged for various attacks, including denial of service. The rule is configured to trigger an alert if 10 such attempts are observed from the same destination IP within 30 seconds.
This rule detects potential drive-by exploit kit landing pages by inspecting HTTP response data for the presence of both "exploit" and "shellcode" (case-insensitive). It specifically looks for these keywords in the data flowing from the server to the client over an established HTTP connection. The rule is categorized as an exploit-kit detection and is associated with MITRE ATT&CK technique T1189 (Drive-by Compromise) and tactic Initial Access.
ET EXPLOIT_KIT LandUpdate808 Domain in DNS Lookup (virtvan .com)
ET EXPLOIT_KIT LandUpdate808 Domain in DNS Lookup (saeam .com)
ET EXPLOIT_KIT LandUpdate808 Domain in DNS Lookup (edentista .com)
ET EXPLOIT_KIT LandUpdate808 Domain in DNS Lookup (dolmain .com)
ET EXPLOIT_KIT LandUpdate808 Domain (imf1 .com) in TLS SNI
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