Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects attempts by a Chrome web browser process to create, modify, or rename files associated with sensitive user credentials or application data, such as AWS credentials, browser logins, or environment configuration files. This behavior is indicative of credential theft or staging of sensitive information.
Detects high-volume file writes or the use of common command-line copy utilities (xcopy, robocopy, copy) targeting removable drive paths (E-G:). This behavior is often indicative of data staging or exfiltration activities.
Detects the execution of manage-bde.exe with command-line arguments designed to enable encryption, disable/delete BitLocker protectors, or modify authentication keys. This pattern is indicative of ransomware abuse, specifically actors attempting to encrypt drives and destroy recovery capabilities, particularly when spawned from scripting or shell environments like PowerShell, CMD, or WMI.
This rule monitors for potential abuse of the Microsoft Management Console (mmc.exe) to proxy malicious activity. It detects three primary behaviors: 1) mmc.exe being launched with a .msc file originating from user-writable or suspicious directories; 2) mmc.exe spawning known suspicious child processes (e.g., powershell.exe, cmd.exe, rundll32.exe); and 3) the creation or modification of .msc files in suspicious locations by processes other than mmc.exe or msiexec.exe.
Detects potential dynamic linker hijacking on Linux systems by monitoring for the use of non-standard LD_PRELOAD paths in process command lines or unauthorized modifications to the /etc/ld.so.preload configuration file, which can be used to inject malicious code into processes.
Detects techniques used by adversaries to hide files, directories, or modify access permissions on Windows systems. This includes the use of 'attrib.exe' to set the hidden attribute, PowerShell cmdlets to set file attributes, 'icacls' to modify or deny permissions, and the creation of hidden Unix-style dot-prefixed files within common Windows user directories.
Detects evidence of file timestomping, a technique used by attackers to modify file system timestamps (Create, Access, Modify, Change) to evade forensic detection or masquerade malicious files. The rule monitors for explicit usage of timestomping tools (e.g., Invoke-TimeStomp), abuse of system utilities like fsutil.exe for timestamp modification by suspicious parent processes, and unauthorized or unsigned processes performing timestamp modification on sensitive file types.
Detects the execution of manage-bde.exe with command-line arguments designed to enable encryption, disable/delete BitLocker protectors, or modify authentication keys. This pattern is indicative of ransomware abuse, specifically actors attempting to encrypt drives and destroy recovery capabilities, particularly when spawned from scripting or shell environments like PowerShell, CMD, or WMI.
Detects potential exploitation of Firefox SmartWindow (CVE-2026-20253) involving token exfiltration via specific URL patterns, unauthorized configuration preference tampering (e.g., smartwindow.enabled, smartwindow.apiKey), or modifications to browser configuration files (prefs.js, user.js) by the Firefox process.
This rule detects the creation or modification of executable files (.exe, .dll, .sys) within critical Windows system directories (C:\Windows\System32\ or C:\Windows\SysWOW64\). Such activity can indicate an attempt to establish persistence, elevate privileges, or inject malicious code into legitimate system processes.
Detects the creation or modification of specific file artifacts known to be used by the Remcos Remote Access Trojan (RAT). This includes persistent configurations or log files named 'keylogger.dat' or 'logs.dat' within the user's AppData/Roaming directories, which are characteristic indicators of Remcos activity.
Detects signs of unauthorized persistence establishment on Cisco SD-WAN nodes (vManage, vSmart, vBond). This rule monitors for modifications to authorized_keys files, creation of suspicious local accounts (e.g., troot), and configuration changes to permit root SSH logins, which are known tactics used to maintain persistent backdoor access following exploitation.
Detects exploitation of CVE-2026-20245 on Cisco Catalyst SD-WAN Manager, where a malicious CSV file is uploaded via the tenant-list workflow to trigger a script that injects a root-privileged account into system files.
Detects the creation of a root-privileged backdoor account named 'troot' on Cisco SD-WAN nodes (vManage, vSmart, vBond). This rule monitors for process-level indicators such as 'useradd' or 'adduser' usage, manual manipulation of '/etc/passwd' or '/etc/shadow' files, and subsequent 'su' activity or authentication logs associated with the 'troot' account. This pattern aligns with post-exploitation persistence mechanisms observed in UAT-8616 activity.
This rule detects the presence and execution of files associated with the proof-of-concept (PoC) exploit for CVE-2026-55200, a remote code execution vulnerability in libssh2. The rule monitors for specific exploit binary names and directory structures commonly used by security researchers or attackers to test or exploit this vulnerability.
Detects bulk file access or modifications in sensitive directories (Desktop, Documents, Downloads) targeting credential and document files (ovpn, kdbx, jks, eml, docx, xlsx, pdf), or direct PowerShell access to OpenVPN configuration or KeePass database files. This behavior is indicative of data staging or exfiltration activities associated with the GIFTEDCROOK stealer.
Detects execution of persistence-related commands such as cron job modifications or SSH key additions originating from development-related parent processes or installation commands like npm/pip. This behavior is indicative of potential supply chain compromises or malicious actors abusing development environments to maintain access.
EXPERIMENTAL: This rule detects RoguePlanet indicators when the Microsoft Defender Antimalware Service Executable (MsMpEng.exe) creates or modifies an executable (.exe, .dll, .sys) file within the System32 or SysWOW64 directories. This behavior can indicate a potential local privilege escalation (LPE) or other malicious activity, especially if Defender is being abused for remediation in a SYSTEM context. The rule specifically highlights 'wermgr.exe' as a high-interest target, but is generalized to catch any PE file.
Detects modifications or renames to critical Windows accessibility feature binaries (sethc.exe, utilman.exe, osk.exe, magnify.exe) located in System32. Adversaries frequently replace these binaries with malicious counterparts or command shells to achieve persistence and gain SYSTEM-level execution via accessibility shortcuts at the logon screen.
Detects the execution of unauthorized processes or file modifications associated with the 'OpenVPN Connect echo script' vulnerability (ACE). This rule specifically identifies process creation events involving command-line arguments that attempt to trigger script execution on VPN disconnect, even when the software's script permission setting is disabled.
Detects the use of 'attrib.exe' to modify file attributes (specifically adding hidden or system attributes) on files with a '.dll' extension located in suspicious directories such as 'ProgramData', 'AppData', or other paths frequently used for persistence or file staging. This behavior is indicative of an adversary attempting to hide malicious artifacts.
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