Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects the specific artifacts associated with the '01flip' ransomware. It triggers when a ransom note named 'RECOVER-YOUR-FILE.TXT' is created, followed by the rapid renaming of more than 10 files on the same host with the '.01flip' extension. The correlation is based on the hostname and the process command line within a 5-minute window, indicating a coordinated ransomware attack.
Detects when a potentially malicious file (such as a macro-enabled document, executable, or script) is created within a directory configured as a Microsoft Office Trusted Location. Attackers may place malicious files in these locations to ensure they are opened by the user without security warnings (like Protected View or macro-blocking), facilitating code execution. This rule correlates file creation events with trusted paths dynamically enumerated from the device's registry.
This rule detects the XenoRAT info stealer and Remote Access Trojan (RAT) by identifying specific strings related to its functionalities. It looks for configuration parameters like 'HostName', 'PortNumber', 'UserName', and 'Password' which are typically supplied at runtime for C2 communication. The rule also identifies strings associated with browser data exfiltration ('Local Extension Settings', 'Sync Extension Settings', 'chromium_plugins', 'logins.json', 'profiles.ini', 'IndexedDB', 'chrome-extension_'), crypto wallet theft ('ChainingModeGCM'), file grabbing capabilities ('%DRIVE_FIXED%', '%DRIVE_REMOVABLE%', 'File Grabber'), and HVNC-style desktop control ('Chrome_WidgetWinOperaWindowClass', 'CreateDesktopA', 'OpenDesktopA'). Additionally, it includes specific hashes of known XenoRAT samples for direct identification.
This rule detects network connections to a predefined list of malicious domains, many of which are hosted on Vercel and appear to be associated with phishing campaigns. The domains often mimic legitimate services or financial documents, suggesting an attempt to deliver malware or steal credentials through phishing. The rule specifically looks for these domains in the 'RemoteUrl' field of 'DeviceNetworkEvents'.
Detects VIMC UNITY campaign trojan/loader: PE with Java Control Panel (javacpl.exe) abuse context, OpenJDK build path (javacplexec/javacpl.pdb), and behavioral strings (logs.txt, XClient.exe, shost.exe). Delivered via email lure VIMC UNITY --LUMUT PORT LAYTIME with attachment VIMC UNITY.gz.
Detects the installation or loading of the POORTRY (Abyssworker) driver, a vulnerable driver used by Osiris ransomware in Bring Your Own Vulnerable Driver (BYOVD) attacks to terminate security software. This rule identifies the driver by its file name, service name, known hashes, and a masquerading technique where it pretends to be a Malwarebytes component.
Detects potential Remcos RAT installation by correlating the creation of an executable in a user's AppData directory with the creation of a registry run key for persistence.
Detects a Windows script host (wscript.exe or cscript.exe) spawning a Java process to execute a JAR file, a behavior observed in STRRAT malware delivery chains.
Detects the creation of a mutex with a pattern specific to the PKR_MTSI packer. This packer is often used to obfuscate malware.
Detects the execution of Node.js (node.exe) when spawned by PowerShell or the Command Prompt from a user-writable directory. This behavior is characteristic of the Tsundere Bot delivery chain used by threat actors like TA584 (Storm-0900), who use a PowerShell script to install and run the Node.js-based malware.
This rule identifies the use of specific malicious code signing certificates by matching their SHA1 thumbprints against a predefined list. These certificates are known to be associated with various threat actors or malicious software, indicating potential supply chain compromise or the use of signed malware.
Detects the execution of executables with names like 'Updater.exe' from suspicious paths in the AppData\Local directory, which are associated with fake PDF converter malware families like PDFClick, Easy2Convert, and ConvertMate.
This rule detects unsigned executables originating from the WindowsApps directory that are making network connections to IP lookup services. This behavior can indicate a potentially malicious application attempting to identify its external IP address, possibly for command and control communication or reconnaissance. Common browsers are excluded from this detection to reduce false positives.
This rule detects the presence and activity of known malicious browser extensions, specifically 'NexShield' and those associated with the 'KongTuke' campaign. It identifies these extensions by their unique IDs found in file paths or names, network connections to associated malicious IPs or domains, and specific file hashes. The rule correlates file events, network events, and process events to provide a comprehensive view of the malicious extension's activity, including when it was first and last seen, the browsers involved, and the files/folders it interacted with.
This rule detects the creation of a hidden command shell by the 'pdf24.exe' process, a behavior associated with the PDFSIDER malware. Specifically, it looks for 'cmd.exe' being spawned with the '/c' argument by 'pdf24.exe'.
A widespread campaign employs malvertising to distribute converter tools that secretly install persistent Remote Access Trojans. These droppers establish scheduled tasks and leverage code signing to load and execute further malicious .NET assemblies from command-and-control servers, enabling continuous system access and data exfiltration.
This rule detects the presence or execution of known malicious infostealer files based on their SHA256 hash values or a specific filename pattern. The SHA256 hashes are associated with infostealer malware as referenced in a VirusTotal blog post. The filename pattern 'malwarebytes-windows-github-io' also indicates potential malicious activity, likely related to a deceptive download or execution.
This rule detects network connections to known cryptocurrency mining pools or domains associated with cryptocurrency mining activities. It specifically looks for keywords like 'miningpool', 'stratum', 'xmr', 'ethash', 'moneropool' in the remote URL or specific IP addresses like 'connect.moneropool.com' and 'pool.supportxmr.com'. This activity often indicates unauthorized resource hijacking (cryptojacking) on the affected device.
Detects a process chain where the Microsoft HTML Application Host (mshta.exe) launches the TamperedChef secondary payload 'ManualFinderApp.exe'.
Detects processes, other than legitimate web browsers or the official Telegram client, making DNS queries for the Telegram Bot API. This behavior is indicative of malware using Telegram for command-and-control (C2) or data exfiltration, as seen in a campaign leveraging Amnesia RAT.
Detects Remcos RAT payloads and commands
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