Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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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.
This detection identifies suspicious child process execution spawned from Notepad++ (notepad++.exe), which may indicate exploitation attempts related to CVE-2026-48778 and CVE-2026-48800. These vulnerabilities involve potential arbitrary code execution through malicious manipulation of Notepad++ configuration (config.xml) and shortcut (shortcuts.xml) files.
The rule detects abnormal execution of system binaries such as PowerShell, CMD, MSHTA, Rundll32, and Regsvr32 launched from Notepad++, which is not expected in normal user activity. Such behavior may indicate successful exploitation, plugin abuse, or post-exploitation execution triggered via malicious configuration or user interaction.
This detection is intended for identifying early indicators of code execution chains originating from Notepad++.
The rule detects abnormal execution of system binaries such as PowerShell, CMD, MSHTA, Rundll32, and Regsvr32 launched from Notepad++, which is not expected in normal user activity. Such behavior may indicate successful exploitation, plugin abuse, or post-exploitation execution triggered via malicious configuration or user interaction.
This detection is intended for identifying early indicators of code execution chains originating from Notepad++.
Detects the creation or modification of YTSysConfig.ini or YTSysConfig.ytf, which are runtime configuration files for the ClientSetup/Yangtu payload used in the TAX#TRIDENT campaign. This activity indicates potential deployment or configuration of the malware.
Detects the creation or modification of the specific malware debug log file 'lua_traceback.log' in the C:\temp directory, which is a unique artifact of the BoldTealLayer loader.
Detects suspicious modifications to Notepad++ configuration files (config.xml or shortcuts.xml) by processes other than Notepad++ itself. This behavior may indicate an attempt to exploit vulnerabilities (e.g., CVE-2026-48778 or CVE-2026-48800) by injecting unvalidated interpreter commands, leading to arbitrary code execution or other malicious activities.
Detects the creation or modification of specific LaunchAgent plist files used by JINX-0164's AUDIOFIX and MINIRAT malware for persistence on macOS. The rule monitors for file creation, renaming, or modification events within the /Library/LaunchAgents/ directory, specifically targeting plist files with names known to be used by this malware.
Detects the creation or modification of GitHub Actions workflow files designed to dump and exfiltrate repository secrets, a technique observed in the Mini Shai-Hulud supply chain attack. This rule specifically looks for file events in GitHub Actions workflow directories combined with command-line patterns indicative of secret exfiltration or the creation of a specific malicious workflow file ('codeql_analysis.yml') by scripting interpreters.
KQL Query
KQL Query
This rule detects modifications, creations, or renames of the Google Chrome 'Secure Preferences' file on macOS. This activity can be indicative of malware, such as FlutterShell, attempting to alter browser settings or inject malicious configurations for persistence or other malicious purposes.
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