Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects potential unauthorized use of MeshAgent RMM software by correlating process execution events (mvtcs.exe, MeshAgent) with network traffic to specific IP addresses identified as associated with Settra command-and-control infrastructure. It specifically filters for MeshAgent activity and validates the threat by requiring an established network connection to known malicious endpoints.
This rule correlates a suspicious process execution (identified by specific command-line indicators), with subsequent persistence modification in Windows Registry Run/RunOnce keys, and a subsequent external network connection (excluding internal IP ranges). The activity is captured within a 15-minute window, suggesting a multi-stage attack pattern involving execution, establishing persistence, and initiating C2 communication.
This rule monitors for suspicious process execution (e.g., cmd, powershell) spawned from PaperCut service processes (pc-app.exe, tomcat.exe) followed by a Domain Admin group membership change on the same device within a 30-minute window. This behavior is indicative of privilege escalation attempts following the exploitation of PaperCut vulnerabilities (CVE-2026-81578/CVE-2026-82078).
Detects removable-media/storage interaction events initiated by the PlugX side-loaded process chain (GRrte.exe / Jarte.exe), consistent with the PlugX core's drive-type query and removable-media ejection behavior (GetDriveTypeW / DeviceIoControl)
Detects activity associated with the 'MovieReaper' threat campaign by identifying known malicious file hashes, command and control (C2) IP addresses, and communication with identified malicious domains. This rule monitors process execution, file operations, and network connections within the campaign's active timeframe.
Detects web requests to 'wp-admin/theme-install.php' containing suspicious query parameters that indicate an attempt to force an unauthenticated theme installation via a Cross-Site Request Forgery (CSRF) exploit (Click2Shell). The rule identifies requests with malicious payloads in the 'theme' parameter, specifically looking for indicators that attempt to bypass CSRF protections when originating from an external site or a non-admin session context.
This rule monitors for indicators of compromise (IOCs) associated with the ShinyHunters threat actor, including specific malicious domains, IP addresses, and artifacts found in command lines or event data. It aggregates telemetry from network events, Entra ID sign-in logs, cloud application activity, email logs, process execution, and general device events to detect interaction with known malicious infrastructure or execution of threat-actor specific artifacts.
Detects execution chains where explorer.exe (acting as the Run dialog host) spawns suspicious processes like mshta.exe, powershell.exe, or cmd.exe with command lines containing URL indicators (http), common payload filenames (rtdx.dat), or specific IP address strings associated with known ClickFix social-engineering campaigns.
This rule detects devices that have both accessed a specific suspicious external domain ('thefatshallot.com') and performed file operations involving HTML files or files containing 'chromecache' in their name within the same 24-hour period. This behavior pattern suggests a potential download of malicious web content or drive-by-download attempt where browser cache files are utilized for file staging or persistence.
Detects the use of PowerShell's Start-Sleep cmdlet with a duration of 3 minutes or longer within process command lines. This technique is commonly used by malware, such as ClickFix-style droppers, to bypass sandbox time-based analysis by delaying execution until the sandbox timeout period has elapsed.
Detects instances where a browser process (Chrome, Edge, Firefox, or IE) programmatically writes content to the system clipboard using JavaScript commands. This pattern is commonly observed in 'ClickFix' style social engineering attacks, where a user is coerced into copying and executing a malicious command script provided by an attacker, often in the context of resolving a fake system error.
This rule detects potentially malicious child processes (cmd.exe or powershell.exe) spawned by PaperCut application processes (pc-app.exe, PCClient.exe, or java.exe), which may indicate exploitation attempts such as RCE following an authentication bypass.
This rule detects modifications to Group Policy Objects (GPOs) that are either explicitly marked as malicious based on known indicators (GUIDs or 'PAYLOAD' strings) or involve unauthorized modifications to domain-root or organizational unit GPO links. It monitors Active Directory security event logs for object changes.
Detects endpoint, process, and network activity associated with the 'TaskStomp' threat actor, specifically targeting known malicious file hashes, command-and-control domains, and specific URLs used in their campaigns.
This rule identifies potential activity related to the Kothamine malware by monitoring for specific file hashes associated with the malware in process and file execution events, as well as network connections to a specific malicious GitHub repository path used for payload delivery.
Detects unauthorized creation, modification, or deletion of Group Policy Objects (GPOs) at the Active Directory domain root. This activity is a high-confidence indicator of potential persistence or domain-wide configuration tampering, often observed during ransomware attacks or privilege escalation attempts where attackers weaponize Group Policy.
Detects sensitive access to the Local Security Authority Subsystem Service (LSASS) process, commonly associated with credential dumping attempts. This rule monitors Windows Security Event 4663, specifically flagging processes attempting to gain specific access levels (e.g., Read, Query, or Full Control) to the lsass.exe process.
Detects suspicious file create or write operations within the domain SYSVOL Policies directory. This pattern is commonly associated with attackers attempting to deploy malicious payloads, such as ransom notes or configuration changes, via Group Policy Objects (GPO). The rule monitors Windows Event ID 4663 to identify unauthorized modification attempts by non-system accounts.
This rule detects the use of 'npm' or 'node' to install packages from a registry other than trusted, standard registries (e.g., npmjs.org, GitHub). It specifically monitors command lines involving 'claude-code' that utilize custom, non-standard registry URLs. This behavior is indicative of potential supply chain attacks or the installation of unauthorized/malicious dependencies.
This rule monitors for a variety of indicators associated with malicious activity, including connections to known malicious IP addresses, the presence of specific malicious file hashes or filenames, modifications to Windows system policies (specifically Legal Notice configuration), and changes to Active Directory Group Policy Objects using specified GUIDs.
Detects attempts to patch or disable Event Tracing for Windows (ETW) functionality by identifying memory modification operations targeting the 'EtwEventWrite' function or direct memory protection changes within 'ntdll.dll'. This is a common technique used by malware and post-exploitation tools to blind security telemetry.
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