Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects indicators of persistence on Linux systems, specifically targeting unauthorized cron job creation/deletion in /etc/cron.d/, execution of suspicious shell scripts (ssync.sh), modification of startup scripts (e.g., /etc/rc.d/cron), and execution of binaries from world-writable directories by cron or system daemons. This rule is designed to identify the footprint of known Linux-based persistence mechanisms associated with service account exploitation.
Detects anomalous file creation or modification events in sensitive Windows System32 directories originating from the Microsoft Defender process (MsMpEng.exe). Additionally, it detects when MsMpEng.exe spawns interactive shells (e.g., cmd.exe, powershell.exe), which is indicative of potential exploitation of vulnerabilities such as CVE-2026-33825, where attacker-controlled file operations are redirected via junction points.
Detects the creation of suspicious scheduled tasks by potentially malicious processes (e.g., winupdate.exe or processes running from AppData/.cache or Temp directories). The rule monitors for schtasks.exe usage that either targets specific persistence locations or creates tasks naming conventions (e.g., 'WindowsDefenderAgent') often associated with the Yuta/Glove Stealer malware family.
Detects suspicious cross-process memory injection activity by correlating remote virtual memory allocation (VirtualAllocEx or MapViewOfSection) followed by the creation of a remote thread (CreateRemoteThread) targeting established legitimate Windows processes. This behavior is commonly associated with malware loaders such as Payouts King and RomulusLoader for facilitating code injection.
Detects malicious persistence mechanisms using the Windows Task Scheduler, specifically targeting the creation or execution of 'TPMProfiler' or 'qemu-system-x86_64.exe' under high-privilege accounts (SYSTEM). This rule monitors for schtasks.exe task creation, anomalous parent-child process relationships involving task host processes, and unauthorized module loads of taskschd.dll associated with QEMU activity.
This rule detects suspicious activity related to the Netlogon service or the LSASS process. It triggers on Netlogon service events (5827, 5828, 5829) which may indicate insecure channel usage or service issues often associated with exploitation, and on Sysmon Event ID 1 where a process is spawned by lsass.exe under the SYSTEM user, a behavior frequently seen during credential dumping or privilege escalation attempts.
This rule detects successful authentication attempts directed at network devices from sources not explicitly marked as authorized management systems. It identifies users or systems that are not recognized service accounts authenticating against network infrastructure and flags activity that involves multiple unique destination targets as high risk.
Detects DLL sideloading behavior where a legitimate, signed executable (e.g., in System32 or Program Files) loads a DLL from a non-standard, user-writable directory (e.g., Temp, AppData, Downloads). This pattern is consistent with the delivery of Obsidian Sandstorm (Storm-2571) payloads such as ThrottleDrift, RiverGorilla, and SilverGorilla, where malicious DLLs are staged and loaded alongside trusted binaries.
Detects potential local privilege escalation activity involving AnyDesk. The rule monitors for malicious registry modifications (COM hijack), spawning of suspicious child processes by AnyDesk, creation of specific named-pipe artifacts, unsigned DLL loads from user-writable directories, and unauthorized cross-process injection, potentially linked to CVE-2026-20253.
Detects DLL side-loading activity associated with the Kazuar backdoor, where legitimate executables (LaunchGFExperience.exe or vncutil64.exe) are executed from unusual directories (Brother Printer or Sony Audio drivers) to load a malicious DLL (LaunchGFExperienceLOC.dll).
This rule monitors for successful and failed user authentication events (Logon events 4624 and 4625) occurring on Saturdays or Sundays. It calculates a risk score based on the volume of authentication attempts and classifies the activity, providing visibility into potential off-hours credential misuse or insider threat scenarios.
Detects when an application or service principal is assigned an app role containing sensitive permissions in Azure AD/Microsoft Entra ID. Such assignments can grant an application elevated access to mail, directory, or user management, which is a common tactic for persistence and privilege escalation in cloud environments.
Detects the installation, service creation, and network activity associated with Tailscale VPN on endpoints. The rule monitors for process creation of Tailscale binaries, creation of associated registry keys, and outbound network traffic to Tailscale infrastructure or the internal 100.64.0.0/10 CGNAT mesh range, which may indicate unauthorized persistence or remote access.
Detects unauthorized or suspicious installation and configuration of the OpenSSH server on Windows endpoints. This rule monitors for process creation of OpenSSH-related binaries, configuration of SSH services (e.g., via sc.exe, PowerShell, or winget), and modification of SSH-related configuration files and registry keys, which are often indicative of attackers establishing persistent backdoor access.
Detects cross-process memory injection techniques indicative of the Havoc framework's Demon agent. The rule monitors for Windows API injection sequences (VirtualAllocEx, WriteProcessMemory, CreateRemoteThread/NtCreateThreadEx), reflective image loads into explorer.exe, and Linux /proc/pid/mem direct memory writes used by the agent to persist or execute in-memory.
This rule detects the creation of a new local user account followed by its addition to the local administrators group within a 10-minute timeframe. It monitors process command lines for 'net.exe' or 'powershell.exe' creating users and then adding them to the 'administrators' group, excluding domain operations.
This rule detects potential lateral movement activity by identifying a single user account attempting to log on to five or more distinct computers with at least ten logon attempts within a five-minute window. It specifically looks for successful logons (EventID 4624) with network, remote interactive, or remote desktop logon types (LogonType 3, 9, 10) and excludes machine accounts (TargetUserName not ending with '$'). This pattern can indicate an adversary attempting to spread across the network using compromised credentials.
Detects artifacts related to the ValleyRAT malware family, specifically identifying markers such as 'Phantom Persistence Module', 'RegisterApplicationRestart', and specific 'RSL_' strings within process command lines, image paths, or module loads using Windows Event Logs and Sysmon data.
Detects suspicious child processes spawned by AI-powered IDE assistants (e.g., Amazon Q, Claude Code, Cursor) that perform AWS credential inspection combined with network exfiltration commands. This activity is indicative of exploitation of IDE extension vulnerabilities (e.g., CVE-2026-12957) where malicious configuration files force the IDE to spawn shell processes to steal and transmit cloud environment credentials.
This rule detects the legitimate Windows filter manager utility, fltMC.exe, performing suspicious activities when launched from temporary directories. It specifically flags cases where fltMC.exe loads modules without a corresponding file path (indicative of reflective DLL injection) or initiates sensitive memory allocation APIs (such as VirtualAllocEx or CreateRemoteThread) that are commonly associated with process hollowing or code injection.
Detects arbitrary code execution attempts against Ghidra 12.1.2 by monitoring for suspicious child process spawning from the Ghidra JVM. The rule identifies instances where java.exe, running in a Ghidra-related context, launches unauthorized binary interpreters or tools such as powershell.exe, cmd.exe, or other shell utilities often used as post-exploitation payloads.
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