Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects the presence of a 7-Zip library file ('7z.dll') located within a specific 'Traiolx Custom Utils' directory. The rule flags this file based on known malicious file hashes (MD5 or SHA256) or its specific file path. This is indicative of an adversary placing custom or potentially malicious tools on a system for archive manipulation or data staging.
This rule detects the presence of compiled Python 3.10 bytecode (.pyc) files that have been renamed to or disguised with a .cat extension. It specifically looks for the 'settingenv.cat' file associated with the Chinotto backdoor, as well as associated C2 URL patterns or command-line artifacts indicative of its download and execution chain.
Detects a sequence of suspicious identity activities indicative of a post-account-takeover pivot. The rule identifies a user profile engaging in corporate VPN SAML SSO probing, triggering a MFA enrollment interrupt in Azure, and subsequently accessing multiple Microsoft 365 applications (Azure Portal, OfficeHome, SharePoint) within a 30-minute window.
This rule detects the execution of cmd.exe with a command line containing both '/k' and 'Set' commands, alongside a regex pattern that searches for specific variable expansion techniques ('%var:~offset,length%'). This pattern is frequently used to obfuscate command lines or bypass static security signatures by reconstructing strings at runtime, often in conjunction with PowerShell commands.
Detects the use of PowerShell to delete .js files located within the 'Downloads' directory. This behavior is commonly associated with cleanup of dropped malicious payloads or script-based malware artifacts.
Detects the execution of PowerShell scripts containing specific obfuscation or encoding patterns. The rule identifies potential malicious intent by searching for hardcoded suspicious strings or common binary-to-string conversion methods used to hide script content from security monitoring.
Detects suspicious process injection attempts into browser processes (e.g., chrome.exe, msedge.exe) characterized by direct NT API syscall invocation (e.g., NtAllocateVirtualMemory, NtWriteVirtualMemory, NtCreateThreadEx) originating from a non-browser parent process. This behavior, often associated with the Remus infostealer, bypasses standard user-mode API hooking by using direct syscall stubs to chain injection actions.
This rule identifies potential prompt injection attempts against Microsoft Copilot and Azure OpenAI services by monitoring CloudAppEvents for specific adversarial markers, encoded instruction blocks, or hidden text patterns. It flags recurring attempts from a single user as suspicious probing activity.
This rule detects potential Business Email Compromise (BEC) attempts where external senders impersonate corporate executives (e.g., CEO, CFO) by spoofing display names or using lookalike/cousin domains. It triggers when these impersonations are combined with urgent, financial-themed language in the email subject line (e.g., wire transfers, payroll changes, or gift card requests).
This rule detects potential CI/CD security compromises in GitHub by monitoring for modifications to workflow permissions that grant 'write-all' access, access to sensitive workflow secrets via 'pull_request_target' from forked repositories, and the registration of new self-hosted runners. These actions are common indicators of supply chain attacks aimed at poisoning pipeline execution or exfiltrating build secrets.
ChainScript file manager 'files' task: node.exe performing high-volume recursive deletion within masqueraded ChainScript installation paths (drive enumeration, dir listing, file read/write, recursive delete)
Detects instances where powershell.exe appears to be launched by explorer.exe via parent process ID (PPID) spoofing. The rule identifies processes where the reported parent explorer.exe was created at or after the child powershell.exe, or within a suspiciously short timeframe, indicating that the parent PID association is likely fraudulent rather than a genuine explorer-initiated shell.
Detects the execution of a renamed Microsoft CoreCLR Debugger (vsdbg.exe) from a directory outside of standard Visual Studio installation paths. This behavior is indicative of DLL side-loading, where a malicious vsdbg.dll is planted alongside the renamed vsdbg.exe, a technique observed in malware loader chains like Rapuncel/BoryptGrab.
Detects sensitive cPanel/WHM administrative commands or system file modifications occurring within one hour of a suspected authentication bypass event, indicative of potential post-exploitation activity related to CVE-2026-41940.
Detects sensitive cPanel/WHM administrative commands or system file modifications occurring within one hour of a suspected authentication bypass event, indicative of potential post-exploitation activity related to CVE-2026-41940.
This rule monitors process execution and registry modifications for filenames, process command lines, or registry keys associated with 'truesight.sys' and 'rentdrv2.sys'. These artifacts are typically associated with malicious kernel-mode drivers, such as rootkits, often used for stealth or persistence on Windows systems.
This rule detects anomalous authentication behavior on SonicWall VPN appliances characterized by either multiple distinct source IP addresses for a single user or a high volume of failed authentication attempts followed by a successful login. These patterns are often indicative of credential stuffing or password spraying campaigns, such as those observed in Akira ransomware affiliate initial access activities.
This rule detects executions of the 'osascript' utility on macOS where the command line argument is exceptionally long and contains high entropy, suggesting the use of base64 or other encoding techniques to obfuscate malicious scripts or payloads.
Detects scenarios where a user registers a new WebAuthn/Passkey credential and subsequently performs a sign-in from a different network or device shortly after, preceded by a sign-in from a risky or non-passkey-based method. This pattern is often associated with credential abuse or MFA registration hijacking.
Detects scenarios where a user registers a new WebAuthn/Passkey credential and subsequently performs a sign-in from a different network or device shortly after, preceded by a sign-in from a risky or non-passkey-based method. This pattern is often associated with credential abuse or MFA registration hijacking.
Detects instances where a Temporary Access Pass (TAP) is assigned to a user account, followed by a sign-in from an unmanaged or non-compliant device within one hour. This behavior is indicative of potential help-desk impersonation (vishing) attacks where an adversary obtains a TAP to bypass standard authentication controls.
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