Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the eicar_com.zip test archive used by the ShieldCrash PoC (CVE-2026-69414) to trigger Windows Defender's vulnerable scan/read path, only when observed alongside ShieldCrash binary or staging path/context indicators to reduce false positives from routine EICAR AV testing
This rule detects suspicious file operations (creation, modification, or renaming) initiated by MsMpEng.exe (Microsoft Defender Antivirus) involving specific indicators related to ELAM (Early Launch Anti-Malware) or 'ShieldCrash' components. These indicators often suggest tampering attempts or the presence of tools designed to interfere with Defender's security operations by targeting its configuration, staging, or protected storage locations.
Detects PEEP credential/session theft via the native-messaging bridge, native host registration, staged CRX, or extension ID references. The nm_host.exe branch is now anchored to the known PEEP extension IDs (primary and alternate build) or the com.peep.lab path, rather than firing on any nm_host.exe spawned by a browser.
Detects malicious command-line activity associated with the XHOPELESS v1.0 wiper, specifically targeting firmware/BIOS/UEFI integrity. The detection covers WMI-based corruption of BIOS attributes, abuse of OEM-specific BIOS management namespaces, execution of legitimate firmware update tools with suspicious flags, modification of registry keys intended to disable firmware updates, and interaction with specific UEFI NVRAM GUIDs.
Detects DragonForce ransomware note (readme.txt) referencing known DragonForce Tor negotiation/blog onion addresses
Detects unauthorized remote access sessions within N-able N-central by monitoring the Windows Application log for events indicating usage of the default 'MSP Support' account or source IP addresses associated with active exploitation of CVE-2026-18577.
Detects rapid, repeated invocation of Microsoft Defender remediation processes (mpcmdrun.exe, MsMpEng.exe) occurring in conjunction with suspicious file write or rename operations in System32. This pattern is characteristic of a Time-of-Check to Time-of-Use (TOCTOU) race condition, where an attacker attempts to exploit the timing gap between Defender's detection and remediation actions to replace a file with a malicious version.
Detects the use of PowerShell commands to add directory exclusions to Windows Defender settings. Adversaries often use this technique to exclude directories in 'AppData' from being scanned by antivirus solutions to hide malicious activity, tools, or persistence mechanisms.
This rule detects potential phishing activity by correlating email delivery of Excel attachments with subsequent network connections to known malicious domains initiated by common browser or office processes. It identifies cases where a user may have opened a suspicious Excel file and initiated an outbound network request to a flagged domain within 24 hours of receiving the email.
Detects the presence of AsyncRAT's screen-capture functionality, specifically the use of .NET Graphics.CopyFromScreen and MemoryStream routines, identified via Microsoft Antimalware Scan Interface (AMSI) inspection logs within a host process.
Detects the execution of 'charmap.exe' from the Syswow64 directory where the process hierarchy indicates suspicious activity. The detection identifies a chain where PowerShell spawns 'conhost.exe', which in turn spawns a process from a temporary directory (interpreted as a renamed AutoIT executable) that then launches 'charmap.exe'. This pattern is indicative of a multi-stage obfuscated execution flow often used in malware dropper scenarios to bypass standard monitoring.
Detects a suspicious process injection chain (OpenProcess, VirtualAllocEx, WriteProcessMemory, CreateRemoteThread) targeting the Windows Character Map utility (charmap.exe) located within the SysWOW64 directory. This activity is often used by adversaries to execute malicious code within a legitimate, signed process context to evade security monitoring.
This rule detects the execution of a malicious AutoIT loader script (identified by the filename 'kojuyn.ini' and a specific SHA-256 hash). The loader is designed to deobfuscate runtime API names and payload paths from XOR-encoded strings, bypassing static analysis. The detection links the presence of this script with the execution of a corresponding AutoIT interpreter binary.
Detects the reflective or in-memory loading of the AsyncRAT DLL (Veukuzmw.dll) into the memory space of the legitimate Windows process charmap.exe, characterized by a lack of corresponding disk activity or suspicious process command-line arguments.
Detects network connections to command-and-control infrastructure associated with the JeetBot/Twitch Enhanced Viewer malicious browser extension. The rule triggers on connections to known malicious domains or IPs, as well as specific API endpoints on ambiguous domains that are used for exfiltrating Twitch OAuth tokens.
Detects network connections to command-and-control infrastructure associated with the JeetBot/Twitch Enhanced Viewer malicious browser extension. The rule triggers on connections to known malicious domains or IPs, as well as specific API endpoints on ambiguous domains that are used for exfiltrating Twitch OAuth tokens.
Detects network connections to command-and-control infrastructure associated with the JeetBot/Twitch Enhanced Viewer malicious browser extension. The rule triggers on connections to known malicious domains or IPs, as well as specific API endpoints on ambiguous domains that are used for exfiltrating Twitch OAuth tokens.
This rule identifies browser extensions installed on devices that are either explicitly known as malicious or exhibit suspicious naming patterns potentially associated with unauthorized or malicious extensions.
This rule identifies browser extensions installed on devices that are either explicitly known as malicious or exhibit suspicious naming patterns potentially associated with unauthorized or malicious extensions.
Detects network connections to command-and-control infrastructure associated with the JeetBot/Twitch Enhanced Viewer malicious browser extension. The rule triggers on connections to known malicious domains or IPs, as well as specific API endpoints on ambiguous domains that are used for exfiltrating Twitch OAuth tokens.
Detects network connections to command-and-control infrastructure associated with the JeetBot/Twitch Enhanced Viewer malicious browser extension. The rule triggers on connections to known malicious domains or IPs, as well as specific API endpoints on ambiguous domains that are used for exfiltrating Twitch OAuth tokens.
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