Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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1
Detects evidence of the MYRA Linux RAT attempting to establish persistence via the LD_PRELOAD environment variable mechanism. The rule monitors for the creation or modification of specific malicious library files (libcache.so, .sh.local) and the execution of processes utilizing LD_PRELOAD to hijack dynamic linker operations.
This rule detects the execution of node.exe or npm.cmd where the command-line arguments include specific indicators associated with suspicious third-party libraries, typosquatted packages, or known malicious domains. These indicators often point to unauthorized external dependencies or potential supply chain attack patterns in JavaScript-based environments.
Detects instances of a Node.js process accessing sensitive browser credential and cookie storage files, which is a common behavior associated with credential theft malware or malicious scripts.
This rule detects potential process injection behavior associated with the Remcos Remote Access Tool. It monitors for suspicious parent-child process relationships where 'remcos.exe' is identified as a parent of 'svchost.exe' or 'explorer.exe', or where Internet Explorer components (iexplore.exe, ieinstal.exe, ielowutil.exe) are executed in a manner inconsistent with typical Windows system process hierarchies.
This rule detects potential unauthorized access to web browser data files (such as logins, cookies, and history databases) or specific registry modifications indicative of browser hijacking or credential theft. It monitors for processes other than known web browsers accessing sensitive browser configuration files or creating registry keys in HKCU that might be used for persistence or browser configuration manipulation.
Detects instances where a process not typically associated with web browsing performs a DNS request for Telegram (telegram.me) or Steam Community (steamcommunity.com) domains, potentially indicating command and control (C2) or unauthorized data exfiltration activity.
This rule detects instances of specific DLLs (Qt5Core.dll or opera_elf.dll) being loaded by known suspicious executables (WizardDa42.exe or AlphVector.exe) from non-standard, potentially user-writable directories like ProgramData or Temp. The rule further filters to include instances where the module's signature is invalid, unsigned, or untrusted, which is characteristic of malicious process masquerading or side-loading.
Detects the use of WinRAR (rar.exe or WinRAR.exe) to archive files, specifically flagging operations that involve recursion, password protection (-hp), or targeting network shares. This behavior is commonly used by adversaries for data staging prior to exfiltration.
Detects the execution of command-line tools associated with virtual machine management (ESXi CLI, PowerCLI, Hyper-V). The rule monitors for specific process executions (esxcli, vim-cmd, powershell) that involve administrative VM actions such as creating or starting virtual machines, which may indicate malicious VM orchestration, data destruction, or persistence attempts in virtualized environments.
Detects execution and compilation activities associated with the DirtyPipe (CVE-2022-0847) vulnerability, which allows an unprivileged user to overwrite data in read-only files, leading to privilege escalation to root. The rule tracks common exploit filenames, compilation patterns, and specific commands used for privilege escalation via unshare or su.
Detects instances where files located in root or non-standard paths are opened by processes that are not core Windows system processes or Microsoft security products, which may indicate suspicious activity such as manual file interaction or discovery.
Detects the execution of process images known as 'XDRAgent.exe' or VMware administration tools ('vmtools.exe', 'vmwared.exe') when their command lines include patterns commonly associated with reverse shell communication, suspicious IP addresses, or unauthorized administrative arguments.
Detects the execution of 'JuicyPotato', a known tool used for local privilege escalation on Windows systems by abusing the BITS service or DCOM to achieve arbitrary process execution as SYSTEM.
This rule detects various Linux persistence mechanisms, including the use of LD_PRELOAD to hijack dynamic linker execution, the creation or modification of malicious cron jobs, and tampering with shell startup scripts. These techniques allow an adversary to maintain access to a compromised host by ensuring malicious code is executed automatically or injected into legitimate processes.
Detects suspicious API call sequences indicative of process injection into the 'svchost.exe' system process. The rule monitors for a combination of memory manipulation and thread execution APIs, such as 'ZwWriteVirtualMemory', 'NtDuplicateObject', 'VirtualAllocEx', and 'CreateRemoteThread', when initiated by processes other than legitimate Windows system processes. This is a common indicator of unauthorized code execution or lateral movement.
Detects unauthorized processes attempting to access sensitive browser credential files (Login Data and Cookies) for Chrome, Edge, and Firefox. The rule applies risk scoring based on whether the accessing process is located in suspicious directories (e.g., Temp, Downloads) or if specific indicators associated with the Millenium RAT are present.
Detects the presence of specific file artifacts ('VULNERABILITY_CONFIRMED.marker', 'smtp-crlf-injection.curlrc') associated with the 'curl-smtp-expn-recipient-crlf-injection' proof-of-concept repository. The rule also correlates this with the execution of the associated 'run_demo.py' script from directories containing 'curl-smtp', helping identify active use of this testing framework.
Detects the installation or presence of a specific malicious Chromium browser extension (ID: flkebkiofojicogddingbdmcmkpbplcd) associated with Perplexity AI-themed phishing or malicious activity. The rule monitors file system events, process command lines, and registry modifications related to the Chrome Extensions directory.
Detects the presence of known malicious Chrome extension IDs, suspicious configuration files (e.g., perplexity-rules.json, bing-rules.json), or extensions utilizing invasive declarativeNetRequest permissions, which are often used for browser-based exfiltration or credential interception.
This rule detects the execution of common command-line interface tools (such as PowerShell, cmd, wscript, and certutil) spawned by the SimpleHelp remote support binary ('simplehelp.exe'). It also monitors for specific network connections associated with the SimpleHelp infrastructure (IP 96.126.130.126 on port 58942) that may indicate remote support activity or misuse of the platform.
This rule detects the use of native Windows utilities to inhibit system recovery (e.g., deleting shadow copies or boot configuration changes) and to clear system event logs. These behaviors are common precursors or indicators of post-exploitation activity, such as ransomware deployment or intrusion cleanup.
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