Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects successful SSH logins that follow a burst of at least 10 failed SSH authentication attempts from the same remote IP address to the same device within a 10-minute window, followed by a successful login within 15 minutes. This pattern is indicative of a successful credential brute-force attack, frequently associated with botnet propagation efforts.
Detects TLS sessions to Sapphire Sleet/UNC1069 Hostwinds C2 infrastructure presenting the exact self-signed certificate issuer string linked to the Mastra/axios campaigns.
Detects a build process (cargo/rustc/build-script-build) that drops an executable to /tmp/rust-setup and launches it detached so it persists after the build completes — the payload-delivery mechanism used by the compromised proc-macro1 Rust crate.
Cortex Agent Exception Rule Created
Cortex XDR
Detects the creation of a new exception rule within the Cortex endpoint agent management configuration. Exception rules can be used to exclude specific files, processes, or behaviors from security prevention policies, potentially leading to a reduction in defensive coverage.
Suricata signature detecting a Zoom annotation CAnnoFormatBlock/CAnnoTextFrame/CAnnoTextRange PDU where a count field (count1-4) precisely exceeds 64, overflowing the 128-byte destination buffer — the wire-level trigger for the ZOOMSDAY buffer overflow, stack overflow, and heap-disclosure primitives (CVE-2026-53413).
This rule detects suspicious outbound network connections from common container runtime processes (e.g., containerd.exe, dockerd.exe) to well-known cloud instance metadata services (169.254.169.254, 100.100.100.200) or suspicious attempts to access container image manifests, which are indicative of SSRF attacks, credential theft from the metadata API, or potential container escape attempts.
This rule detects potential data exfiltration or verification behavior by correlating a file write event in a temporary directory (/tmp/) with a subsequent 'cat' command execution reading that same file within a 10-minute window. This behavioral pattern is often associated with C2 agents staging data for retrieval.
Detects anomalous, non-browser process activity interacting with Microsoft Teams APIs associated with the TWINLOOT threat campaign. The rules identify suspicious token retrieval requests and unauthorized authentication headers from processes that do not identify as legitimate browser or Teams application agents, indicating potential abuse of application access tokens and authentication flows.
Detects data exfiltration by the Kynx Stealer ChunkSender module which uses HTTP POST requests to a specific ingestion path.
Detects successful SSH authentication to a Linux system using public-key authentication by monitoring system logs for the 'Accepted publickey for' message. This rule identifies remote access attempts and serves as a foundation for monitoring lateral movement via SSH.
This rule detects suspicious outbound network connections from common container runtime processes (e.g., containerd.exe, dockerd.exe) to well-known cloud instance metadata services (169.254.169.254, 100.100.100.200) or suspicious attempts to access container image manifests, which are indicative of SSRF attacks, credential theft from the metadata API, or potential container escape attempts.
Detects the creation and enablement of a systemd unit file that uses a deceptive description ('Apache HTTPD Cache Manager') and the 'Restart=always' directive. This pattern is characteristic of persistence mechanisms used by the Evooo1Bot malware, which attempts to maintain continuous execution by running as a system service.
Detects high or critical severity audit events generated by Cortex XDR Collectors, which may indicate health, connectivity, processing, or configuration issues leading to gaps in security visibility.
The following analytic detects kernel-level events where a setuid binary launches a shell or interpreter with a NULL argument vector, which occurs when a privilege escalation exploit gains root and executes a process via execve() without constructing a legitimate argument array.
Detects module or image load events where the image lacks an associated on-disk path (FolderPath is empty). This behavior is indicative of in-memory code loading, such as reflective loading or the execution of Beacon Object Files (BOFs), where malicious code is mapped directly into process memory rather than loaded via the standard OS image loader.
Detects a read of /etc/os-release by a binary outside known system-utility paths, a precursor to the Rust-based RAT's host-fingerprinting telemetry; paired with a correlation rule requiring a subsequent outbound connection from the same binary to reduce noise.
This rule detects large file uploads (greater than 100MB) from endpoints to unmanaged or personal cloud storage services such as Google Drive, OneDrive, and Dropbox. This behavior may indicate unauthorized data exfiltration or the improper use of unapproved cloud storage platforms to move sensitive data outside of corporate control.
KQL Query
Detects a Zoom client (zoom.exe/zoom.us/CptHost.exe) terminating abnormally (SIGABRT/SIGSEGV/stack corruption) from within the annotation module (libannotate.so) within 30 seconds of receiving a message-type-75 (CAnnoObjAutoMetaShape) annotation object, indicating exploitation of the linked-list unlink write-what-where primitive (CVE-2026-53415). Excludes update-triggered restarts and graceful shutdowns.
Detects the execution of administrative or system-modifying tools (e.g., bash, sh, chroot, mount) or suspicious command lines involving root-level path manipulation or capability inspection (capsh) initiated by office applications, sandbox host processes, or specialized Excel engines. This behavior is indicative of a potential container breakout, privilege escalation, or post-exploitation activity originating from an initial access vector.
This rule detects potentially malicious command execution (RCE) originating from AI orchestration platforms and development runtimes (such as Ollama, LangChain, AutoGen, CrewAI, n8n, Node.js, and Python). It flags instances where these processes spawn command shells (cmd.exe, powershell.exe, bash, sh) and execute suspicious command-line patterns indicative of code injection or command execution (e.g., eval(), exec(), subprocess, child_process). The rule uses a threshold of 3 or more occurrences in a 15-minute window per device and process to reduce noise.
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