Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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IOC hunt for the HEAVYGRAM/CRUDEEXCLUDE campaign: matches known SHA256 file hashes (first-stage malware, implant, RAR/ZIP artefacts) via DeviceFileEvents and DeviceProcessEvents, plus known-malicious domains/staging infrastructure by parsed hostname across network connections, process command lines, and file origin URLs.
Detects the execution of mshta.exe with a command line involving remote HTTP connections or suspicious file extensions (.dat), which are often used by adversaries to proxy the execution of malicious scripts or HTA files.
Detects outbound network connections from internal devices to a set of known malicious IP addresses (217.156.122.129, 37.221.66.43) across commonly abused command-and-control ports (8080, 3480, 9998, 9999, 4444).
This rule monitors for the presence or execution of files matching a known set of SHA256 hashes associated with the 'DXSCAN' malware, utilizing both device file and process events.
Detects outbound network connections from internal devices to a set of known malicious IP addresses (217.156.122.129, 37.221.66.43) across commonly abused command-and-control ports (8080, 3480, 9998, 9999, 4444).
Detects the suspicious registration of a Cloud Filter provider callback using staging paths and naming conventions associated with the ShieldCrash (CVE-2026-69414) exploit. The rule monitors DeviceEvents for cloud provider activity that originates from unsigned or untrusted binaries, excluding known-legitimate cloud synchronization clients.
This rule detects suspicious clipboard access attempts initiated by common scripting interpreters (node.exe, python.exe, powershell.exe) in non-standard paths or correlated with recent external network connections. It is designed to identify potential credential theft or data staging using clipboard interaction methods often employed by malware.
Detects OtterCookie JavaScript-based RAT/infostealer malware artifacts associated with WaterPlum/Contagious Interview campaign
Detects file artifacts referencing InvisibleFerret, a Python-based backdoor used by WaterPlum/North Korean IT worker actors for persistent access to victim networks
Detects periodic outbound network connections (beaconing) to rare remote destinations initiated by processes running from non-standard or user-writable locations. The rule calculates the interval coefficient of variation (CV) between successful connections to identify regular, consistent patterns indicative of command and control communication while excluding known legitimate update and service traffic.
Detects access to sensitive files (KeePass databases, SSH private keys, and VPN configurations) by processes other than their designated applications. This behavior indicates potential credential harvesting or configuration exfiltration by unauthorized processes.
This rule monitors for the loading or interaction with specific device drivers named 'truesight.sys' or 'rentdrv2.sys'. These drivers are often associated with malicious activity, including potentially vulnerable kernel drivers used in BYOVD (Bring Your Own Vulnerable Driver) attacks or rootkit-like persistence mechanisms. The rule tracks driver loading, registry updates, process activity, and device I/O control calls related to these files.
Detects high volumes of file creations, modifications, or renames ending with a specific encrypted file extension (.df_win) occurring across multiple network (SMB) shares from a single host within a short timeframe. This behavior is indicative of ransomware activity where a compromised host attempts to encrypt files on accessible remote storage.
Detects attempts to delete Volume Shadow Copies using native Windows administrative tools such as wmic.exe and vssadmin.exe. This activity is frequently associated with ransomware, as adversaries often delete local backups to prevent data recovery.
Detects the SMB share discovery pattern associated with the DragonForce ransomware, where the system enumerates network shares (excluding ADMIN$) followed by unauthorized bulk write operations to these shares, indicating potential lateral movement and file encryption.
This rule detects processes that load the 'rstrtmgr.dll' library and subsequently perform mass process termination (3 or more distinct processes in under 2 minutes, excluding 'explorer.exe'). This behavior is commonly associated with ransomware, such as DragonForce, which uses the Windows Restart Manager API to identify and forcefully close applications that are locking files they intend to encrypt.
This rule detects potentially malicious PowerShell activity executed from Windows Explorer with obfuscated arguments (-enc, -w hidden) in conjunction with access to the Windows RunMRU registry key, which tracks commands executed via the Windows Run dialog.
Detects instances where browser extensions interact with specific AI-driven websites (Gemini, Perplexity, Claude) in a manner that bypasses user input or interacts with hidden DOM elements. This pattern is indicative of malicious browser extensions injecting scripts or manipulating content in the background without explicit user authorization, potentially for data exfiltration or automated session interaction.
Detects execution of PowerShell with a hidden window and base64-encoded command arguments that targets the file 'WindowsUpdate.log'. This pattern is associated with the CRPx0 (ClickFix) ransomware, where it attempts to drop or interact with a stager file disguised as a legitimate Windows update log file.
Detects instances where PowerShell or mshta.exe are launched by a web browser or Windows Explorer, often indicative of the 'ClickFix' social-engineering campaign. In this scenario, users are tricked into copying and pasting malicious commands from a fake CAPTCHA or update prompt directly into a Windows terminal or the Run dialog, leading to code execution.
This rule detects the use of standard Windows administrative utilities (wmic.exe, vssadmin.exe, and wbadmin.exe) to perform destructive operations on volume shadow copies or backup catalogs. These actions are frequently associated with ransomware attacks to prevent system recovery.
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