Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects suspicious process injection attempts where common scripting/execution binaries (wscript.exe, cscript.exe, mshta.exe, powershell.exe, msiexec.exe) are observed creating remote threads in other processes (RegAsm.exe, InstallUtil.exe, vbc.exe, svchost.exe, explorer.exe). The detection is further refined by looking for specific keywords in the initiating process's command line that are indicative of malicious activity, such as downloading content or executing scripts. This rule aims to identify advanced persistent threats and malware leveraging process injection for defense evasion and privilege escalation.
Detects suspicious image loads where a renamed Microsoft .NET ClickOnce Launch Utility or other .NET masquerading binaries sideload mscoree.dll or msvcp140.dll from the ProgramData directory. This behavior is associated with the Lorem Ipsum threat activity.
Tycoon2FA PHaaS User Agent Detection
Cortex XDR
Detects user agents associated with Tycoon2FA phishing-as-a-service (PHaaS) campaigns, specifically targeting credential relay (axios/1.13.x) and device code phishing (node/undici) variants. The rule identifies sign-in attempts from unmanaged and non-compliant devices using these specific user agents during a device code flow authentication.
Hunting rule loosely modeled after Atomic Red Team T1112 test "Disable Windows Change Password Feature". No public in-the-wild intel reference available; correlate before alerting.
Hunting rule loosely modeled after Atomic Red Team T1112 test "Disable Windows Task Manager application". No public in-the-wild intel reference available; correlate before alerting.
Hunting rule based off of T1112 technique "Modify Registry of Local Machine - cmd". No public in-the-wild intel reference available; correlate before alerting.
This rule detects the use of BITSAdmin to transfer files from a remote HTTP/HTTPS source where the downloaded file has a common arbitrary extension (txt, dat, bin, jpg) but is being renamed to a .dll extension. This technique is often used by adversaries to stealthily download secondary loaders or malicious DLLs.
Detects the ClickOnce shim DLL (dfshim.dll) being loaded by non-standard processes, indicating potential sideloading or execution abuse. The rule specifically excludes common legitimate processes like explorer.exe, rundll32.exe, dfsvc.exe, and presentationhost.exe from triggering an alert.
This rule detects the creation or modification of executable files (.com, .exe, .scr, .pif, .bat, .cmd) in common user directories (Documents, Downloads, Desktop) where the initiating process is a legitimate application like explorer.exe, winrar.exe, or 7z.exe. This pattern is often used in phishing attacks where malicious executables are disguised as benign documents.
Detects the creation of specific vulnerable driver files abused by Gentlemen RaaS EDR killers.
Detects the use of WScript or CScript (Windows scripting engines) to launch commands intended to disable or tamper with security products, including Windows Defender, system firewalls, Bitdefender, and Kaspersky antivirus solutions.
Detects the creation of a scheduled task involving QEMU binaries or associated configuration files, correlated with registry modifications that reference similar artifacts. This pattern is indicative of potential malicious use of virtualization tools for persistence, execution, or environment cloaking.
Detects execution of PowerShell spawned by script engines (wscript.exe, cscript.exe) using 'certutil -decode' to process files within the 'ProgramData' directory. This pattern is characteristic of the NUKESPED staging phase, often attributed to the Kimsuky threat actor, where obfuscated or encoded payloads are decoded into executable form using built-in system utilities.
Detects file creation, copy, or rename operations within known VPN application directories (CyberGhost, ExpressVPN, NordVPN) when initiated by Chromium Embedded Framework (CEF) related processes (CefSharp.BrowsersSubprocess). This behavior is highly irregular as standard web browser components should not be modifying the local configuration or installation directories of VPN software.
This rule detects the use of BITSAdmin and PowerShell's Start-BitsTransfer utility to download files from known malicious or suspicious GitHub repositories and specific filenames associated with campaign activity.
Detects anomalous activities associated with the Zerologon (CVE-2020-1472) vulnerability. The rule identifies suspicious machine account password changes, NTLM authentication from potentially untrusted subnets or unconfigured workstations, and privilege escalation indicators occurring on domain controllers.
Detects modifications to the Windows Update registry keys that disable automatic updates. Attackers may perform this action to prevent the installation of security patches and maintain vulnerabilities on a compromised system.
Detects execution of the macOS.Gaslight Rust-based implant. The rule identifies the specific malicious binary by its SHA-256 hash and targets its behavior of using runtime dynamic symbol resolution (via dlsym) to hide API calls from static analysis.
Detects potential malware execution chains characteristic of AMOS (Atomic macOS Stealer) and related 'ClickFix' campaigns. The rule monitors for the silent downloading of a disk image (.dmg) file to the /tmp directory using curl with quiet flags, followed immediately by the mounting of that image using hdiutil with the -nobrowse flag to bypass user notification and Gatekeeper security prompts.
Detects HTTP responses that utilize JavaScript Web Crypto API (subtle.importKey, subtle.decrypt) or AES-GCM encryption in conjunction with data decoding functions (atob, Uint8Array.from). This behavior is characteristic of malicious landing pages, such as those used by ErrTraffic ClickFix and EvilTokens campaigns, which encrypt payloads to evade static analysis by security tools.
Detects execution of PowerShell scripts associated with ErrTraffic (ClickFix) campaigns. The rule identifies malicious patterns, including the use of hex-encoded XOR operations, specific browser update comment markers, and the dynamic creation of ScriptBlocks to facilitate payload execution.
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