Arnold Chan
@slazTrusted contributorCompletionist
2 followers2,099 downloads4,319 copies51 likes25,767 views
7,544 detections
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Detects high-frequency login attempts using the Dahua Easy4IP protocol. The rule flags multiple login opcode requests (identified by specific byte patterns 0xFF followed by 0x00A0) originating from the same source within a 60-second window, which is indicative of an automated brute-force or credential-stuffing attack targeting vulnerable IoT devices.
Detects the invocation of the AppInstaller executable to install .msix packages, often used in software installation or malicious delivery scenarios involving application deployment.
This rule detects the installation of browser extensions that occur during an idle user session (greater than 7 minutes). This behavior is consistent with automated, remote-driven synthetic input injection, often utilized by malware (e.g., NinjaMare) to install malicious extensions without user consent while the system is unattended.
This rule detects the execution of processes or network connections that impersonate 'WhatsApp' or 'Instagram' companion applications. It identifies specific file names and process command lines that mimic these applications, often associated with browser-launched or malicious payloads, and monitors for associated network traffic directed toward suspicious endpoints like herokuapp domains.
Detects a specific evasion behavior associated with the NinjaMare malware, where a process idles for at least 7 minutes before moving its window to off-screen coordinates during automated mouse or keystroke input, followed by restoring the window to its original position.
Detects incoming TCP and UDP traffic containing the 'sxcdewqaz!@#' magic string. This pattern is characteristic of a packet-triggered backdoor (often referred to as 'Fire Ant'), which uses custom packet payloads to activate malicious functionality on a listening host.
Detects high-frequency TCP SYN connection attempts originating from an internal device, which is indicative of a port scanning behavior typically used for network service discovery.
Detects the use of the FTP 'STOR' command to transmit a file with the '.pcap' extension to an external network. This behavior is indicative of potential data exfiltration where captured network traffic is being uploaded to an attacker-controlled server.
This rule detects unauthenticated TCP connection attempts targeting ports 43210 and 43211, which are associated with the Nexus 9000 S1HAL service. These attempts are indicative of potential exploitation activity related to CVE-2026-20212.
This rule detects unauthorized modifications to sensitive Windows registry keys related to SCHANNEL ciphers, protocols, or FIPS algorithm policies. It specifically identifies when these security settings are weakened (e.g., enabling insecure algorithms or disabling security defaults) by interactive users rather than authorized system processes or configuration management tools like Intune or SCCM.
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