Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects when five or more driver-related files (.inf, .sys, or .drv) are created or modified within a one-hour window by the same initiating process account. This behavior can be indicative of malicious driver installation, rootkit activity, or other forms of persistence or privilege escalation.
This rule detects an unusual number of file creations or modifications where the filename contains keywords like 'patch', 'update', or 'fix' by a single account within a one-hour window. This could indicate an automated patching process, software deployment, or potentially malicious activity attempting to modify system files under the guise of an update.
This rule detects suspicious file creation or modification events in the root directory (C:\) for files commonly associated with boot sectors, such as 'bootsect.bak', 'bootloader', 'MBR', and 'VBR'. Such modifications can indicate ransomware activity or other forms of boot integrity compromise.
Detects the creation or modification of TxF CLFS log files (FsTxLog.blf) within the System Volume Information directory, which is a primary staging mechanism for the YellowKey BitLocker bypass. The rule also identifies potential VMware MAC OUI within the Resource Manager GUID, indicating a high-confidence proof-of-concept artifact.
This rule set detects various stages of the JFMBackdoor and Showboat malware, including DLL sideloading of FLTLIB.dll by fltMC.exe from non-standard directories, network connections to known C2 and staging infrastructure (namefuture.site or 23.27.201.160), command-line activity referencing a specific Pastebin URL used by Showboat for process-hiding code, and the creation of JFMBackdoor payload artifacts (flt.bin, scr.mui).
Detects the creation or modification of an executable named 'GoogleUpdateService.exe' within a user's Windows Startup folder. This activity is indicative of the SStar Agent malware establishing persistence, as it masquerades as a legitimate Google update service but uses an atypical persistence mechanism (Startup folder instead of Scheduled Tasks or Registry Run keys).
This rule detects attempts to modify the Info.plist file on macOS systems to include 'LSUIElement' with a value of '<true/>'. This modification can be used by malware or unwanted applications to hide their presence from the macOS Dock and menu bar, effectively bypassing user detection and making the application run as a background process. The rule specifically looks for these two content strings within HTTP file data flowing to the client.
This rule set detects various stages of the JFMBackdoor and Showboat malware, including DLL sideloading of FLTLIB.dll by fltMC.exe from non-standard directories, network connections to known C2 and staging infrastructure (namefuture.site or 23.27.201.160), command-line activity referencing a specific Pastebin URL used by Showboat for process-hiding code, and the creation of JFMBackdoor payload artifacts (flt.bin, scr.mui).
Detects the creation, modification, or renaming of 'btasc.cfg', a configuration file specifically associated with the JFMBackdoor malware. This file is used to store encrypted configuration data necessary for the backdoor's operation.
This rule set detects various stages of the JFMBackdoor and Showboat malware, including DLL sideloading of FLTLIB.dll by fltMC.exe from non-standard directories, network connections to known C2 and staging infrastructure (namefuture.site or 23.27.201.160), command-line activity referencing a specific Pastebin URL used by Showboat for process-hiding code, and the creation of JFMBackdoor payload artifacts (flt.bin, scr.mui).
This rule detects network traffic containing the string "/etc/udev/rules.d/" over TCP port 22 (SSH). This string is indicative of an attempt to modify udev rules, which can be used for Linux persistence by executing malicious scripts or commands when specific hardware events occur. The detection is focused on traffic flowing from the home network to a server on the home network, suggesting an internal system attempting to modify udev rules on another internal system via SSH.
Identifies the creation or modification of the hardcoded persistence and staging directory used by the JFMBackdoor malware, specifically 'C:\Users\Public\jfm'. This rule detects file system events within this specific path, indicating potential JFMBackdoor activity.
Detects file write operations to '/mnt/runner' indicating a sudoers configuration modification. This technique is utilized by the Miasma npm malware to grant passwordless sudo access for privilege escalation on GitHub Actions CI/CD runners.
Detects the creation, modification, or renaming of the TieringEngineService.exe executable within the System32 directory. This activity is associated with the RedSun exploit (CVE-2026-41091), which leverages Defender remediation redirection to plant a malicious binary. The rule specifically filters out legitimate Windows update operations originating from the WinSxS directory to reduce false positives.
Detects creation or manipulation of the ROTATE subdirectory within the Skylight Metrics Agent path by non-SYSTEM accounts. CVE-2026-7791 exploitation requires replacing the legitimate ROTATE directory with a junction point targeting the attacker's desired write location. The Skylight service then follows the junction during its log rotation, writing attacker-controlled files to the target with SYSTEM privileges. Any non-SYSTEM interaction with this specific path warrants investigation.
Detects the creation of the 'TieringEngineService.exe' bait file within a specific RedSun temporary directory pattern (RS-{GUID}) associated with the RedSun exploit (CVE-2026-41091). This activity indicates an attempt to exploit Windows Defender.
This rule detects an unusual number of file creations or modifications where the filename contains keywords like 'patch', 'update', or 'fix' by a single account within a one-hour window. This could indicate an automated patching process, software deployment, or potentially malicious activity attempting to modify system files under the guise of an update.
Detects Hero proxyware artifacts being written or modified within the Windows SysWOW64 directory. Presence of these files may indicate installation of unauthorized proxy services or abuse of enterprise endpoints for traffic relaying.
This rule detects suspicious file creation or modification events in the root directory (C:\) for files commonly associated with boot sectors, such as 'bootsect.bak', 'bootloader', 'MBR', and 'VBR'. Such modifications can indicate ransomware activity or other forms of boot integrity compromise.
Detects modified PAM modules or ELF files implementing PAM backdoors for credential interception, as seen in Ebury and QLNX, whihc uses Rootkit techniques.
Detects unauthorized modification of the Google Chrome Secure Preferences file, specifically targeting the default search provider data to hijack browser searches. This behavior is actively used by malware such as FlutterShell to redirect all Chrome searches to attacker-controlled infrastructure.
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