Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects execution artifacts and prerequisite activities associated with the DirtyClone (CVE-2026-43503) local privilege escalation exploit. This includes monitoring for the creation of unprivileged user namespaces, loading specific kernel modules (esp4, esp6, rxrpc) often used in such exploits, compilation of associated exploit source files, and direct interaction with /proc/self/mem to perform memory-based exploitation.
This rule detects the creation of directories or files within /var/tmp that use the hidden naming convention (dot-prefix), specifically looking for '.xlamb' or '.x'. Such hidden directories in temporary storage locations are commonly used by attackers for staging malicious tools, malware, or backdoors.
Detects download, execution, and network activity associated with the 'isp.sh' dropper script. This includes the use of common utilities like curl or wget to fetch the script from a specific C2 IP address (83.142.209.214), piping the script directly to a shell, and signs of secondary payload execution such as 'lambsys'.
This rule detects network connections or DNS queries to known public tunneling services (e.g., Cloudflare Tunnel, localtunnel, bore, devtunnels) made by processes other than common web browsers. Attackers frequently use these services to bypass firewalls and establish unauthorized reverse shells or persistent C2 channels.
Detects attempts to disable or modify critical Linux security subsystems including SELinux and AppArmor. The rule monitors for the execution of commands such as setenforce, aa-teardown, and systemctl, or direct modifications to security configuration files.
Correlates a user passing a CAPTCHA gate (Cloudflare Turnstile, reCAPTCHA) with an immediate subsequent connection to an unknown, low-prevalence domain hosting the actual phishing landing page.
Detects unauthorized modification or dropping of model files directly into the local Hugging Face cache directory (~/.cache/huggingface/hub) by non-standard development processes, indicating an attempt to swap legitimate models for backdoored ones.
Detects the execution of sensitive ESXi administrative commands (e.g., esxcli, vim-cmd) that suggest potential hypervisor management or tampering, especially when initiated by non-administrative processes or specific shells.
Detects high volumes of file operations (creation, rename, or modification) where files are given extensions typically associated with ransomware (e.g., .locked, .encrypted). The rule aggregates activity by process and endpoint and triggers an alert when the number of such operations exceeds a defined threshold, while excluding known legitimate backup and security software.
Detects network connections to the Telegram API, specifically to the /sendMessage or /getUpdates endpoints. This activity can be indicative of command and control (C2) communication or data exfiltration using Telegram as a covert channel.
Detects command lines consistent with ArachneC2 implant generation and hardening options.
Detects creation of ArachneC2 operator key files under the default ~/.arachne directory.
This rule detects pre-payload beaconing activity associated with the Meow RAT malware. It covers both network-based detection (outbound HTTP POST to known C2 domains and paths) and endpoint-based detection. Endpoint detection includes 'curl' processes communicating with known C2 infrastructure, 'osascript' processes spawned in the context of 'curl' C2 communication, and 'curl' commands using specific flags ('-k', '-s') along with a known build hash. This activity typically occurs before the main destructive payload is delivered.
Detects suspicious execution patterns involving 'npm' or 'node' processes, specifically looking for command-line arguments or folder paths related to 'apintegrationpost' or known components of the MYRA malware family (libcache.so, memfd_loader, proc_hide, injector, agent_launcher). This rule aims to identify potential supply chain compromise or malicious activity leveraging Node.js environments.
Detects the execution of ffmpeg with the '-decoders' flag to enumerate available decoders, specifically looking for the vulnerable MagicYUV decoder. It also identifies 'grep' commands searching for 'magicyuv' in process command lines, which could indicate reconnaissance or triage activity related to CVE-2026-8461.
Monitors for the use of 'sshpass' to automate SSH logins, specifically targeting accounts commonly associated with Oracle/PeopleSoft administration (psoft, oracle, linuxadm) and bypassing strict host key checking. This technique has been observed in ShinyHunters attacks for lateral movement.
Monitors for the use of 'sshpass' to automate SSH logins using specific accounts commonly associated with Oracle/PeopleSoft administration (psoft, oracle, linuxadm) with disabled strict host key checking. This technique was observed in ShinyHunters attacks.
Identifies the Python script explicitly reading developer secrets including AWS credentials, SSH private keys, and Kubernetes configuration files.
Detects the execution of SSH or Plink processes with command-line arguments indicating local, remote, or dynamic port forwarding. Adversaries may use port forwarding to tunnel traffic through a compromised host to bypass network segment restrictions or access internal resources.
Detects attackers creating transient systemd units via systemd-run to persist malware or
reverse shells outside normal unit files. Linux malware families including cryptominers and
botnets use --remain-after-exit and custom unit names under /tmp or /dev/shm to survive
logout while evading static service file inspection.
reverse shells outside normal unit files. Linux malware families including cryptominers and
botnets use --remain-after-exit and custom unit names under /tmp or /dev/shm to survive
logout while evading static service file inspection.
This rule detects network connections on port 443 made to common public DNS resolvers (1.1.1.1, 8.8.8.8, 8.8.4.4, 9.9.9.9, 149.112.112.112) by processes other than known web browsers. This behavior is atypical for standard endpoint processes and may indicate the use of DNS-over-HTTPS (DoH) for command and control or data exfiltration to bypass network filtering.
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