Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects bulk filesystem operations (create, copy, rename, move, delete) performed by the masqueraded process 'msedge.exe' located in 'C:\ProgramData\Microsoft\Windows\Telemetry\', indicative of the MovieReaper 'file manager' module performing mass file manipulation.
This rule detects file creation or modification events occurring within the 'ProgramData\ZlibDate' directory. This specific path and the associated file extensions (.Dat and .zip) are frequently associated with data staging activities or unauthorized file management by malicious software attempting to persist or exfiltrate data under the guise of legitimate application data.
This rule detects unauthorized processes modifying the 'Secure Preferences' configuration file in Google Chrome or Microsoft Edge browser data directories. This activity often indicates an attempt by malicious software to hijack browser settings, such as forcing extensions or modifying security policies, which is a common precursor to credential theft or persistent malicious access.
This rule detects unauthorized processes modifying the 'Secure Preferences' configuration file in Google Chrome or Microsoft Edge browser data directories. This activity often indicates an attempt by malicious software to hijack browser settings, such as forcing extensions or modifying security policies, which is a common precursor to credential theft or persistent malicious access.
This rule detects unauthorized processes modifying the 'Secure Preferences' configuration file in Google Chrome or Microsoft Edge browser data directories. This activity often indicates an attempt by malicious software to hijack browser settings, such as forcing extensions or modifying security policies, which is a common precursor to credential theft or persistent malicious access.
Detects the creation or renaming of specific files ('windowSysUpdates.txt' or 'GymTraniningShedule.exe') within the user's Local AppData directory or its 'SystemFolder32'/'System Folder32' subdirectories. This behavior is indicative of potential malicious activity, such as staged malware persistence or disguised payloads.
Detects execution of shell commands by cmd.exe in conjunction with the creation or modification of 'command.txt' or 'results.txt' files, which are indicative of the RUSTYSHADE backdoor's C2 synchronization behavior.
Detects the historical HPlus HTS fraud infrastructure chain. The rule monitors for the reading of a configuration file named 'config.Ini', followed by an outbound FTP connection (port 21), and the subsequent launch of an executable, which is indicative of a Quasar RAT deployment sequence.
This rule detects potential ransomware activity by monitoring for specific file naming patterns associated with known ransom notes (.krsid, README_KRSID.Txt) and the execution of suspicious processes (HTSPnew.Exe, UBPUpdater.exe).
Detects a suspicious correlation where a host reports a confirmed exploit attempt followed by a high volume of file modifications (encryption behavior) within a single hour. This short dwell time is a strong indicator of automated or AI-orchestrated ransomware deployments.
Detects unauthorized file operations (creation, modification, or renaming) against the Windows hosts file located at C:\Windows\System32\drivers\etc\hosts. This is a common technique used by attackers to redirect network traffic, hijack domains, or disrupt communications to security services. The rule excludes common system processes known to perform legitimate maintenance on this file.
This rule detects file access, creation, modification, or renaming operations involving sensitive files associated with cryptocurrency wallets (Bitcoin, Electrum, ElectrumSV), game account configurations (Battle.net, Steam, Minecraft), and browser-based cookies (Roblox). The rule filters out legitimate process interactions, identifying suspicious activity from unknown or unauthorized applications potentially attempting to exfiltrate credentials or session tokens.
Detects the creation or execution of suspicious .bat files within the Windows Startup folder, often coupled with command-line arguments involving .ini files. This behavior is indicative of persistence mechanisms where adversaries leverage the startup folder to ensure malicious scripts run upon user logon.
Detects the creation or modification of a file with a specific randomized name ('nloemfbihmhm') in the temporary directory, followed by the execution of a process identified as AutoIt from the same directory.
This rule detects potentially malicious attempts to import certificates into the Windows certificate store using command-line tools like certutil or direct modification of the registry. This behavior is frequently associated with attackers attempting to establish persistence, bypass certificate validation, or install rogue trust anchors for man-in-the-middle operations.
Detects potential data exfiltration activity associated with the GRAYRABBIT threat actor, where a local file is accessed or modified by a process shortly before or after that same process initiates a network connection to a known GRAYRABBIT C2 endpoint over port 443.
This rule detects potential attempts to tamper with or bypass Windows Defender by monitoring for files or processes named 'ShieldCrash' occurring in close temporal proximity to the creation or modification of files within Windows Defender's shadow or scan directories (BaseNamedObjects\Restricted\WD_SHADOW_ or WD_SCAN). This behavior is often associated with malware attempting to evade security detection.
This rule detects potential attempts to tamper with or bypass Windows Defender by monitoring for files or processes named 'ShieldCrash' occurring in close temporal proximity to the creation or modification of files within Windows Defender's shadow or scan directories (BaseNamedObjects\Restricted\WD_SHADOW_ or WD_SCAN). This behavior is often associated with malware attempting to evade security detection.
This rule detects a correlation between the creation or modification of a specific file name ('nloemfbihmhm') and the subsequent execution of processes from the 'Temp' directory involving related filenames ('kojuyn.ini', 'ogftogcyiblzjccmcbnw.exe', or 'nloemfbihmhm') within a 5-minute window. This behavior is indicative of a multi-stage execution chain, often used by malware to drop and execute secondary payloads.
Detects browser extension manifest.json files requesting declarativeNetRequest and content_scripts/host_permissions covering AI assistant vendor domains (BragJack attack class)
Detects the 'Comet.exe' process, associated with the Perplexity Comet AI agent, accessing sensitive system files or configuration directories outside its expected scope. This pattern of file interaction is characteristic of unauthorized data collection or exfiltration attempts, specifically linked to the BragJack threat activity.
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