Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This Suricata rule detects potential steganography payloads embedded within image downloads. It specifically looks for the JPEG file signature `FF D8 FF` within the first 3 bytes of an HTTP response, combined with a large file size (greater than 500KB). The rule also includes a threshold to prevent excessive alerts, triggering if 5 such downloads occur from the same destination within 60 seconds. This behavior is indicative of an attempt to hide malicious code or data within seemingly innocuous image files to evade detection.
This rule detects attempts to download known exploit framework tools such as Metasploit, Cobalt Strike, Empire, Covenant, Sliver, or Havoc by inspecting HTTP URI content. The detection is based on case-insensitive pattern matching within the HTTP URI.
Payload Download from GitLab Raw
Suricata
This rule detects attempts to download executable or script files (PowerShell, executable, DLL, shell script, Python script) from the 'raw' content section of gitlab.com. This behavior is often associated with adversaries staging or retrieving malicious payloads.
This rule detects a PowerShell Empire C2 beacon pattern over HTTP. Specifically, it looks for HTTP POST requests to '/index.jsp' where the client body contains a base64-like encoded string of at least 200 characters, indicated by the PCRE pattern. This pattern is characteristic of how PowerShell Empire agents communicate with their command and control server.
This rule detects default beacon check-ins from Cobalt Strike. It specifically looks for HTTP POST requests to the URI '/submit.php' with a User-Agent string matching the pattern 'Mozilla/5.0 (compatible; MSIE [0-9]/'. This combination of indicators is characteristic of the default configuration of Cobalt Strike's beacon communication.
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 potential keylogger data exfiltration over HTTP POST requests. It specifically looks for HTTP POST requests with a URI containing "keys" (case-insensitive) and a data size greater than 500 bytes. This combination suggests a large amount of data, possibly keystrokes, being sent to a server.
Detects the staging of the Lucid Stealer hidden self-copy loader and the SQLite CLI helper binary in the Temp directory. This rule specifically looks for file creation events in the user's Temp directory with filenames matching patterns associated with Lucid Stealer's staging activities: 'winupd_*.exe' for its self-copy loader and '_sq3e_*.exe' for its SQLite helper.
Detects the execution of 'update.exe' where the parent process is 'svchost.exe'. This specific process chain is indicative of the MiniFast malware, which uses this technique as an anti-analysis check. Legitimate software updates or scheduled tasks might also use svchost.exe to spawn update.exe, requiring careful tuning to reduce false positives.
Detects suspicious execution of the Bun runtime executing a JavaScript payload from the /tmp directory, matching the Miasma stage-four execution pattern. This rule specifically looks for the Bun executable running a JavaScript file named 'p<random>.js' within the /tmp directory, which is characteristic of the Miasma credential stealer.
Detects outbound network connections initiated by 7-Zip processes. This could indicate compromise of the 7-Zip application, potentially through exploitation of vulnerabilities like CVE-2026-48095, leading to data exfiltration or command and control communication.
This rule detects the delivery of a Linux VDSO (Virtual Dynamic Shared Object) hijack tool via HTTP. It specifically looks for HTTP traffic to a client containing the strings "[vdso]" and "mprotect" (case-insensitive) within the file data. This combination of strings suggests the presence of code designed to manipulate the VDSO, a technique often used for privilege escalation or evasion on Linux systems.
Detects network connections to the specific local port 8738 used by the IronWorm Exodus wallet injection module to exfiltrate stolen seed phrases and passwords. This rule specifically looks for outbound connections from the 'exodus.exe' process to localhost on port 8738.
This rule detects attempts to bypass Windows User Account Control (UAC) elevation prompts by leveraging specific COM objects. It looks for HTTP traffic containing the strings "ICMLuaUtil" and "ShellExec" (case-insensitive) in the file data, which are indicative of this technique. This method is often used by malware to gain elevated privileges without user interaction.
This rule detects attempts to retrieve C2 configuration from Pastebin, specifically looking for HTTP requests to 'pastebin.com' that include '/raw/' in the URI. It uses a threshold of 5 occurrences within 300 seconds from the same source to reduce false positives.
This rule detects attempts to push potentially malicious container images to an internal registry. It specifically looks for HTTP POST requests to '/v2/' and '/blobs/uploads/' URIs, indicating an image layer upload, with a data size greater than 100KB. This behavior could be indicative of an attacker attempting to establish persistence or introduce malicious code into the container environment.
This rule detects network traffic indicating the installation of a Transport Agent on an Exchange server. It specifically looks for the strings "TransportAgent" and "Install-TransportAgent" in TCP traffic directed to port 25 of the home network, suggesting a potential malicious or unauthorized installation of an Exchange Transport Agent.
This rule detects the delivery of a malicious Outlook form script over HTTP. It specifically looks for HTTP traffic flowing to the client that contains the strings "IPM.Note", "Script", and "VBScript" within the file data, indicating an attempt to deliver a VBScript-based Outlook form.
This rule detects network traffic on port 445 (SMB) containing the strings "LSASS" and "AddDll" (case-insensitive). This combination of strings suggests an attempt to register a malicious DLL with the Local Security Authority Subsystem Service (LSASS) for persistence, a technique often used by malware to maintain access on a compromised system. The flow is set to 'to_server' and 'established', indicating an outgoing connection from the monitored network to a server, and that the TCP connection has been successfully established.
This rule detects the delivery of a file over HTTP that contains the strings "AppDomainManager" and "CreateDomain" (case-insensitive). This combination of strings is indicative of an attempt to hijack the AppDomainManager, a technique used for persistence in .NET applications, often associated with T1574.014 (AppDomainManager Hijacking) from MITRE ATT&CK.
This rule detects the delivery of shellcode designed to hijack the KernelCallbackTable. It specifically looks for HTTP traffic (flow:to_client,established) containing the strings "KernelCallbackTable" and "NtUserSetWindowsHookEx" (case-insensitive) within the file data. This technique is often used for privilege escalation or persistence by redirecting kernel callbacks to malicious code.
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