Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
233 detections
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Detects a single host rapidly initiating outbound Telnet (port 23) or SSH (port 22) connection attempts against a large number of distinct remote IP addresses in a short window. This behavior is indicative of bot-agent scanners, such as those associated with IoT botnets, attempting to propagate by performing brute-force login attempts using default credential pairs.
Detects the execution of MokManager UEFI binaries or administrative activity via the mokutil utility targeting the MokListX denylist. This activity is indicative of Secure Boot configuration changes, such as enrolling unauthorized certificates or bypassing MOK (Machine Owner Key) denylist enforcement, which can facilitate the persistence or execution of malicious boot-level code.
Detects when the Secure Boot Advanced Targeting (SBAT) registry policy on Windows systems is either missing or contains outdated revocation entries (lacking 'shim,4' and 'grub,5'). This indicates the boot chain may be using vulnerable bootloader components susceptible to known security bypasses, as the system is not properly enforcing updated revocation generation policies.
Detects potential exploitation attempts targeting Ruckus devices using known CVEs.
Detects network logs identifying exploitation attempts or vulnerability scans targeting known Ruckus Wireless vulnerabilities (CVE-2020-22653, CVE-2020-22658, CVE-2023-25717). The rule parses CommonSecurityLog entries where the device, message, or activity fields contain references to these specific vulnerabilities.
Detects the execution of 'FortiGateSniffer', a tool identified as Golang-based, used to perform passive network packet capture on compromised FortiGate devices. The rule also analyzes captured traffic for sensitive authentication protocols including RADIUS, Kerberos, and NTLM.
Detects the execution of the FortigateSniffer binary or the use of the 'diagnose sniffer packet' command on FortiGate devices, which are used to passively intercept network traffic including authentication protocols like RADIUS, NTLM, and Kerberos.
Detects the LEASHTEST MIPS-compiled test binary linked to UAT-7810 ORB network R&D activity; presence indicates device compromise
Detects the use of the 'diagnose sniffer packet' command on FortiOS, or evidence of the FortigateSniffer tool (associated with past FortiGate vulnerabilities). This behavior is indicative of unauthorized packet capture and potential credential sniffing on network infrastructure devices.
Detects inbound HTTP POST requests directed at the /SDK/webLanguage path, which is known to be vulnerable to command injection via CVE-2021-36260 in Hikvision IP cameras.
Campaign converting compromised FortiGate firewalls into credential stealers
Detects potential exploitation attempts against management interfaces of SOHO network devices (Cisco, Ubiquiti, Draytek) by monitoring for suspicious web request activity, specifically targeting paths like /admin, /cgi-bin, or /setup.cgi. The rule identifies high-volume or systematic scan patterns from external sources, which may indicate automated exploitation attempts (e.g., related to CVE-2026-35616).
Campaign converting compromised FortiGate firewalls into credential stealers
Detects suspicious HTTP requests and API activity targeting Fortinet devices, specifically matching patterns associated with known vulnerabilities like CVE-2022-40684 and CVE-2024-21762. The rule monitors for unauthorized REST API calls, attempts to interact with sensitive administrative endpoints, and patterns indicating potential authentication bypass or remote code execution attempts on FortiGate, FortiOS, and FortiProxy appliances.
Campaign converting compromised FortiGate firewalls into credential stealers
Detects suspicious command execution on Linux-based SOHO/IoT devices, specifically targeting patterns associated with log deletion, unauthorized cron job modification, busybox utility abuse, and temporary directory execution. This activity is often linked to botnet recruitment and reconnaissance behaviors such as those observed in the JDY and Volt Typhoon campaigns.
Detects a suspected exploitation of CVE-2026-35616 on edge/SOHO devices, followed within 5 minutes by the download of an architecture-specific MIPS dropper via curl or wget, a behavior consistent with known threat activity such as the Volt Typhoon/JDY Botnet.
Detects unauthorized persistence mechanisms on Cisco SD-WAN Manager, vSmart, and vBond nodes by monitoring for local account creation (e.g., useradd), modification of sensitive authentication files (/etc/passwd, /etc/shadow), and illicit SSH key placement in authorized_keys. This rule specifically monitors for known exploit paths involving the 'troot' account and related command-line activity indicative of unauthorized administrative access.
Campaign converting compromised FortiGate firewalls into credential stealers
Campaign converting compromised FortiGate firewalls into credential stealers
Campaign converting compromised FortiGate firewalls into credential stealers
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