Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects a sequence of behaviors indicative of credential theft followed by data staging and exfiltration. It identifies processes accessing sensitive browser credentials or KeePass database files, followed by the creation of a ZIP archive within user profile directories, and concludes with an outbound HTTPS connection to a non-trusted, non-Microsoft external destination by the same process.
Detects unauthorized modifications to SSH 'authorized_keys' files or the '/etc/ssh/sshd_config' configuration file on Linux systems. These actions can be used for persistent access (key injection) or to weaken SSH security controls (e.g., enabling root login) and are typical indicators of account manipulation or compromise.
Detects processes that install a low-level keyboard hook (WH_KEYBOARD_LL) and are simultaneously involved in suspicious activity, such as network connections to non-private IP addresses and file writes to typical temporary directories (e.g., C:\Windows\Temp, C:\Users\Public). This behavior is characteristic of keylogging activity and subsequent data exfiltration or staging.
Detects the dropping, service creation, or execution of known vulnerable drivers and associated BYOVD tools. These tools are used by The Gentlemen RaaS group to escalate privileges to kernel level and terminate endpoint security products.
This rule detects activities associated with VILE ransomware, focusing on unsigned Go-based binaries. It flags processes performing cross-process operations, creating specific file artifacts (e.g., vile_deadlines.json, vile_Decryptor), or invoking direct NT system calls such as NtCreateWaitCompletionPacket to evade EDR hooks.
This rule detects suspicious activity related to GitHub Actions workflows, including the creation or modification of workflow configuration files, the placement of suspicious JavaScript files in the repository's .github directory, the execution of the 'Bun' runtime within an Actions runner environment, and cloud-based events indicating workflow modification containing 'Run Copilot' strings. These patterns are often associated with CI/CD pipeline compromise, malicious automation, or unauthorized code execution within build environments.
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 identifies when a single account creates three or more files containing 'backup', 'export', or 'dump' in their filenames within a one-hour period. This activity could be indicative of data staging for exfiltration or an attempt to back up sensitive information prior to a malicious action.
Detects high volumes of file operations (creation, rename, or modification) where files are given extensions typically associated with ransomware (e.g., .locked, .encrypted). The rule aggregates activity by process and endpoint and triggers an alert when the number of such operations exceeds a defined threshold, while excluding known legitimate backup and security software.
Detects injection of malicious DYLIB libraries via LC_LOAD_DYLIB mechanism
Detects the execution of ServiceModelReg.exe followed by suspicious network or file system activity. ServiceModelReg.exe is a legitimate Windows utility that may be abused by adversaries for process hollowing or masquerading to evade defenses.
Detects the silent installation of Opera GX mods by correlating the rapid arrival of a .crx file followed by the creation of a manifest.json file within the Opera GX mods profile directory. This pattern indicates potential exploitation of the silent installation pipeline where an extension is added without explicit user confirmation prompts.
Detects the creation of a scheduled task where the action references an executable file located in common user-writable directories (ProgramData, AppData, Users\Public, or Temp) shortly after that file was created on the disk. This pattern is characteristic of persistence mechanisms used by threat actors associated with Operation Turb00, such as the Wingo or HijackLoader malware families, which use scheduled tasks to maintain persistence via dropped binaries.
Detects the Operation Turb00 SnappyClient delivery and persistence mechanism, characterized by the execution of a malicious AlphVector.exe process that loads a trojanized opera_elf.dll and WebView2Loader.dll. The rule also identifies the creation of specific persistence artifacts, including a legacy Task Scheduler 1.0 .job file named 'socket_dispatcher_v2.job' in the Windows Tasks directory and a malicious shortcut 'prompt_analyzer_debug.lnk' within the user Startup folder.
Detects the creation of files with non-standard extensions (.elf, .raw, .file, .sense) in the 'C:\Users\Public\' directory. This activity is indicative of the ShadowDumper tool, which generates LSASS memory dumps and writes them to publicly accessible paths using atypical file extensions to evade signature-based detection.
Detects the installation of known malicious PyPI packages ('frint', 'skytext', 'slogsec', 'logcrypt.cryptography') associated with the ChocoPoC supply chain campaign. The rule monitors process execution commands related to 'pip' package installation and tracks the appearance of malicious compiled extension files ('gradient.pyd', 'gradient.so') on the filesystem.
Detects a multi-stage attack chain beginning with the execution of suspicious processes (mstsc.exe, mshta.exe) from email clients or download directories, followed by WinRAR or unrar.exe writing files containing path traversal sequences, and concluding with the execution of a child process from a suspicious directory. This behavior aligns with exploitation attempts targeting vulnerabilities like CVE-2025-8088.
This rule detects activities associated with the NotDoor malware used by APT28 for email-based exfiltration. It specifically monitors for the creation of staging files in temporary directories, the use of Outlook.exe to establish external SMTP connections on common mail ports, and the transmission of emails to known adversary-controlled addresses.
This rule detects potential web shell activity on ColdFusion or IIS servers by monitoring for the creation of known malicious file names typically associated with web shells and the execution of suspicious child processes (e.g., cmd.exe, whoami.exe, powershell.exe) by common web server worker processes (w3wp.exe, coldfusion.exe, jrun.exe). It also identifies suspicious command-line patterns referencing the web root directory.
Detects the creation of a new .vhdx virtual disk file by hypervisor management processes. This behavior is used by threat actors, specifically Akira ransomware, to instantiate new virtual machines that lack organizational security tooling to evade endpoint detection before proceeding with malicious activities.
Detects malicious PowerShell activity associated with the Gamaredon group, specifically targeting obfuscated command lines used for HTML smuggling and downloader execution. This rule monitors for combined Base64 and HTML entity decoding, .NET reflection-based assembly loading, suspicious mshta.exe spawning PowerShell, and PowerShell creating HTML files.
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