SigmaHQ Detections
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6,797 detections
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Detects the modification of the PortProxy registry key, which is used for port forwarding. This can indicate an adversary setting up a proxy for lateral movement or command and control.
Detects exploitation attempts targeting Pulse Secure VPN appliances via CVE-2019-11510. Specifically, it looks for requests to a URI path containing '/dana/html5acc/guacamole/', which is indicative of an attacker attempting to access the Guacamole component of the Pulse Secure appliance.
Detects process executions that exhibit characteristics commonly associated with Emotet malware, specifically focusing on obfuscated PowerShell command line arguments. The rule looks for specific base64 encoded strings and patterns often used by Emotet for defense evasion and execution.
Detects process executions characteristic of Formbook malware. Specifically, it looks for processes originating from System32 or SysWOW64 directories with an executable extension, that then execute a command line containing '/c', 'del', and paths within 'C:\Users\<user>\AppData\Local\Temp\' or 'C:\Users\<user>\Desktop\'. It also covers a variant using '/C' and 'type nul >' for deletion on the Desktop. The rule aims to avoid false positives by excluding parent processes with command line parameters, suggesting an injection scenario where the parent process itself doesn't have complex command line arguments.
Detects access attempts to the SUPERNOVA webshell, specifically looking for requests to 'logoimagehandler.ashx' with 'clazz' in the query string, or requests to 'logoimagehandler.ashx' resulting in a 500 HTTP status code. This activity is indicative of an adversary interacting with a deployed webshell.
Detects an attempt to leverage the vulnerable servlet "mboximport" for an unauthenticated remote command injection in Zimbra Collaboration Suite Email Server, specifically targeting CVE-2022-27925. The rule looks for POST requests to the '/service/extension/backup/mboximport' endpoint with specific query parameters ('account-name', 'ow', 'no-switch', 'append') and then checks for subsequent requests to '/zimbraAdmin/*.jsp' with a 200 status code, indicating potential successful exploitation and web shell access.
Detects a specific child/parent process relationship indicative of a "WerFault" process running from the "WinSxS" directory as a service. This behavior has been reported by CISA as indicative of potential SNAKE malware activity.
Detects potential shellcode injection attempts by monitoring process access events where a process requests specific access rights (0x147a or 0x1f3fff) and the call trace contains 'UNKNOWN'. This behavior is characteristic of tools like Metasploit's migrate and Empire's psinject, which inject shellcode into other processes. The rule includes filters to reduce false positives from legitimate system processes like Wmiprvse.exe accessing Lsass.exe, Dell software interactions, and Microsoft Visual Studio processes.
This rule detects the creation of an 'explorer.exe' child process from common shell processes such as 'cmd.exe', 'powershell.exe', or 'pwsh.exe'. Attackers may use 'explorer.exe' as a proxy for execution to evade defense mechanisms. While this activity can be legitimate, it is often indicative of anomalous behavior and has been observed in use by threat actors like Muddy Waters.
Detects the execution of known tunneling and exfiltration tools such as httptunnel, plink, socat, and stunnel. These tools can be abused by adversaries to establish covert communication channels, bypass network restrictions, and exfiltrate data from compromised systems.
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