Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects repeated Nginx worker process crashes terminated by signals 6 (SIGABRT) or 11 (SIGSEGV) accompanied by core dumps. High-frequency crashes originating from a single source are indicative of an adversary brute-forcing ASLR in preparation for exploitation of memory corruption vulnerabilities (e.g., buffer overflows or heap clobbering) to achieve remote code execution.
Matches known Larva-24009 (HeptaX) malicious file hashes
Detects exploitation of the CVE-2026-12569 Java deserialization vulnerability in PTC Windchill and FlexPLM. The detection triggers when the specific payload class 'com.ptc.wpcfg.logic.ExpressionClassMethod' is identified within command-line arguments of Java-based processes, indicating an attempt to achieve remote code execution through the application's deserialization flaw.
Detects instances where an nginx worker process spawns a shell interpreter, such as sh or bash. This behavior is highly irregular for a web server and is often indicative of exploitation of a remote code execution vulnerability, such as the referenced CVE-2026-42533.
Detects the execution of 'cloudflared', a tool used to establish secure tunnels from a local network to Cloudflare's edge, by monitoring for common command-line arguments such as 'service install', 'tunnel run', or '--url'. This behavior could indicate an attempt by an attacker to create a persistent or ad-hoc reverse proxy for remote access.
Detects network connections originating from processes named 'sftunneld' or connections to public IP addresses over specific ports (443, 8305). This pattern is often used to identify potentially suspicious outbound communication, such as tunneling or C2 activity, particularly when observed from non-standard internal processes.
This query performs comprehensive field extraction and normalization on SentinelOne Deep Visibility raw logs. It acts as a parsing and preparation layer to structure diverse event categories (process, network, file, registry, authentication, and task events) into a standardized format for security analysis, triage, and threat hunting.
Detects anomalous native code execution behavior within Firefox or Tor Browser processes by correlating memory protection changes (e.g., VirtualProtect/mprotect) with subsequent suspicious execution events occurring within a two-minute window, indicative of WebAssembly-based exploit chains.
Detects cloning and building xmrig-proxy from source (git clone + cmake/make), used by JadeProx operators to relay cryptomining traffic from compromised hosts behind a single mining pool connection. Build commands must specifically reference the xmrig-proxy repository or directory to reduce false positives from generic development builds.
Detects post-exploitation persistence and anti-forensic activity associated with the RufRoot/CVE-2026-59726 vulnerability. The rule identifies the creation of unauthorized .js files within application directories, the modification of 'index.js' followed by a SIGKILL to process ID 1 to force a container restart, and attempts to clear bash command history to hide malicious footprints.
Threat actors are exploiting the recently Discovered WordPress Vulnerability. Vulnerability Management platform like defender not fully capable of identifying the vulnerable WordPress Core Application being installed on the organizations Servers. If you are using Defender XDR, here's the KQL to hunt for WordPress Installed Linux and Windows Servers.
Detects outbound network traffic to the 'logfriend[.]com' domain, specifically to endpoints used by the Forg365 'ForgCookie' browser extension. This extension is known to facilitate the automated refreshing of Microsoft SSO cookies, potentially enabling persistent session hijacking and bypassing MFA.
Detects process execution events involving database-related commands that may indicate credential tampering or illicit database backups, often associated with database credential theft or exfiltration attempts.
Detects network connections originating from processes named 'sftunneld' or connections to public IP addresses over specific ports (443, 8305). This pattern is often used to identify potentially suspicious outbound communication, such as tunneling or C2 activity, particularly when observed from non-standard internal processes.
Detects local processes invoking the splice() syscall with the MSG_SPLICE_PAGES flag to map file descriptors of readable SUID-root binaries directly into network socket buffers. This is the core technique behind CVE-2026-31635 (DirtyDecrypt), which corrupts the page cache of SUID-root binaries by placing their pages into attacker-controlled network packets before authentication completes.
Detects unauthorized file system access to sensitive Gitea configuration files (app.ini) or internal directories (custom/conf, data/tmp) by the gitea/git service account. This pattern is indicative of post-exploitation credential or secret harvesting following remote code execution vulnerabilities, such as the diffpatch git hook RCE (CVE-2026-60004).
Detects command-line execution associated with WhatsApp API contact synchronization, specifically looking for 'WPP.contact.getAllContacts' or 'WPP.contact.list' commands. This pattern may indicate automated or unauthorized scraping of contact lists via a messaging interface.
Detects an unprivileged local user invoking keyctl to add a key of type rxrpc_s to a keyring they control, enabling userspace reproduction of the kernel's RxGK token encryption key derivation as part of CVE-2026-31635 (DirtyDecrypt) exploitation.
Detects anomalous shell processes spawned as children of Git operations ('git apply' with index flags or specific plumbing commands) typical of the Gitea repository RCE vulnerability (CVE-2026-60004). This rule identifies malicious Git hooks triggered by the Gitea service account to execute arbitrary commands.
This rule detects the creation of executable files within Git hooks directories ('.git/hooks') initiated by 'git' or 'gitea' processes. The logic specifically excludes files ending in '.sample' to focus on active hook deployment. This behavior is indicative of the 'diffpatch' collision technique (CVE-2026-60004), where attackers attempt to plant malicious Git hooks to achieve remote code execution (RCE) in the context of the Gitea service account.
Detects execution of a bash reverse shell using /dev/tcp TCP redirection, a persistence/backdoor technique used by TA458 SpyPress operators on compromised webmail servers to connect back to C2 infrastructure.
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