Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects anomalous child process execution from PHP web handler processes (e.g., php-fpm, php-cgi) indicative of exploitation of the StreamBucket SOAP RCE vulnerability. The rule identifies spawning of common shell tools or access to sensitive process memory files (/proc/self/maps or /proc/self/mem) associated with ASLR defeat techniques used in this exploit chain.
This rule detects the execution of tools associated with HTTP/2 upgrade queue poisoning proof-of-concept (PoC) code or anomalous process-level interactions involving nghttpx. It tracks specific command-line strings, file operations, and unauthorized spawned sub-processes originating from nghttpx, which could indicate attempts to exploit request smuggling vulnerabilities in HTTP/2 implementations.
Detects rapid succession of power-off, suspend, or destroy operations on virtual machines via esxcli or vim-cmd following an SSH login, a behavior pattern often associated with ESXi ransomware activity (e.g., Qilin).
Detects reconnaissance and exploit activity associated with the BUMSRAKETE exploit (CVE-2026-45257) targeting FreeBSD. The rule identifies system configuration checks of kernel parameters related to kTLS and mbuf external pages, as well as the execution of file permission manipulation commands often required to bypass immutable (schg) file flags during the exploitation process.
Detects indicators of the BUMSRAKETE FreeBSD kernel-level exploit (CVE-2026-45257). This rule monitors for exploit artifact file creation, malicious use of dd to overwrite SUID binaries for privilege escalation, kernel configuration enumeration via sysctl, spawning of shell processes with root UID from suid-related binaries, and kernel version fingerprinting.
Detects evidence of exploitation for CVE-2026-45257, a FreeBSD vulnerability that allows bypassing chflags schg immutable flags. The detection tracks the initial reconnaissance phase where unprivileged processes query the sysctl 'kern.ipc.mb_use_ext_pgs' followed by the creation of specific exploit restorer artifacts '/tmp/.lpe_orig' and '/tmp/.x'.
Detects instances of the systemd-userdbd process executing from non-standard file paths or general systemd-related processes launching from world-writable or temporary directories (e.g., /tmp, /dev/shm, /var/tmp, /home). This behavior is often indicative of process masquerading or a persistence mechanism where an adversary attempts to execute a malicious binary by mimicking system service naming conventions.
Detects indicators of persistence via dynamic linker hijacking on Linux systems, specifically looking for the creation or usage of .libcache.so, modifications to /etc/ld.so.preload, hidden shell profile droppers, or node process execution utilizing LD_PRELOAD variables.
Detects suspicious system calls by unprivileged users involving unshare, IPsec XFRM policy configuration, and kernel module loading. This specific sequence is used in the DirtyClone (CVE-2026-43503) exploit, which leverages local IPsec tunnels to perform page-cache corruption and modify sensitive system binaries in memory.
Detects execution and file artifacts associated with the GSocket (gs-netcat) utility, often used by threat actors like Velvet Ant (Operation Highland) for establishing SOCKS proxies, tunneling, and persistent remote access. The rule monitors process creation, file modifications, and network connections related to the tool's binary names, command-line arguments, and specific file paths.
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 potential dynamic linker hijacking on Linux systems by monitoring for the use of non-standard LD_PRELOAD paths in process command lines or unauthorized modifications to the /etc/ld.so.preload configuration file, which can be used to inject malicious code into processes.
Detects signs of unauthorized persistence establishment on Cisco SD-WAN nodes (vManage, vSmart, vBond). This rule monitors for modifications to authorized_keys files, creation of suspicious local accounts (e.g., troot), and configuration changes to permit root SSH logins, which are known tactics used to maintain persistent backdoor access following exploitation.
Detects the creation of a root-privileged backdoor account named 'troot' on Cisco SD-WAN nodes (vManage, vSmart, vBond). This rule monitors for process-level indicators such as 'useradd' or 'adduser' usage, manual manipulation of '/etc/passwd' or '/etc/shadow' files, and subsequent 'su' activity or authentication logs associated with the 'troot' account. This pattern aligns with post-exploitation persistence mechanisms observed in UAT-8616 activity.
Detects suspicious child processes (such as shell interpreters or downloader tools) spawned by Langflow, uvicorn, or python processes. The rule focuses on common indicators of post-exploitation activity, including code execution via python arguments, use of curl/wget to pull payloads, and execution of shell scripts often associated with malware droppers.
This rule monitors for processes attempting to enumerate sensitive environment variables related to cloud services (AWS) and AI platforms (Anthropic), or access specific configuration and credential files (e.g., .aws/credentials, .config/anthropic). It specifically correlates these behaviors with potentially suspicious parent processes like bash, node, or python interpreters, which may indicate an AI agent or a reverse shell performing reconnaissance or credential exfiltration.
Detects the initialization of unprivileged user and network namespaces combined with specific IPsec tunnel configurations (xfrm/esp/veth). This sequence of operations is a known prerequisite for exploiting the DirtyClone (CVE-2026-43503) vulnerability, a Local Privilege Escalation (LPE) in the Linux kernel.
Detects indicators of SSH-based lateral movement and credential access, including suspicious SSH command-line flags (e.g., BatchMode, StrictHostKeyChecking), manual enumeration of SSH keys via ssh-add, inspection of agent socket variables, and unauthorized access to critical SSH configuration and identity files by non-standard processes.
Detects the execution of 'unshare' with flags (such as --user/--net or CLONE_NEWUSER/CLONE_NEWNET) by unprivileged users. This behavior is indicative of attempts to gain CAP_NET_ADMIN capabilities within a new namespace, a necessary precursor to exploiting the pedit COW (CVE-2026-46331) vulnerability for privilege escalation.
Detects potential Velocity Template Language (VTL) injection attacks targeting API Gateway environments. The rule identifies suspicious payloads in HTTP request bodies or URLs that attempt to leverage Java-based classes (e.g., ProcessBuilder) for code execution. It also monitors for IAM scope bypass attempts, abnormal HTTP method/path combinations associated with API Gateway control-plane operations, and evidence of shell/system commands being spawned from API Gateway-related parent processes.
Detects unauthorized or suspicious modifications to critical Linux configuration directories (e.g., cron, rc, init, ipsec) or specific application-related paths by processes not typically associated with system management or package maintenance. The rule further elevates risk when specific indicators like LD_PRELOAD, LD_LIBRARY_PATH, or known malicious string artifacts are present in the command line or file path.
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