Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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IDS Classtypes
1
Detects PowerShell command execution that uses bitwise XOR operations combined with the .NET [IO.File]::WriteAllBytes method. This pattern is commonly used by malware, such as AsyncRAT, to deobfuscate and drop secondary payloads or modules onto the file system during execution.
This rule detects PowerShell commands that exhibit signs of obfuscation by searching for specific string manipulation methods commonly used to hide malicious code. Specifically, it identifies the use of base64 decoding (FromBase64String) or string concatenation combined with character replacement techniques (Replace) on the command line, which are often used by threat actors to execute encoded payloads while bypassing simple string-based signatures.
This rule detects potentially unauthorized access or large-scale extraction of sensitive RADIUS server configuration and credential databases. It monitors for common database management tools and commands used in conjunction with RADIUS-specific paths, particularly when executed by unexpected processes, during off-hours, or in a manner indicative of bulk data export.
This rule detects potentially unauthorized access or large-scale extraction of sensitive RADIUS server configuration and credential databases. It monitors for common database management tools and commands used in conjunction with RADIUS-specific paths, particularly when executed by unexpected processes, during off-hours, or in a manner indicative of bulk data export.
Detects the execution of MeshCentral remote management agent (meshagent.exe) or activity associated with its default installation paths and markers. MeshCentral is legitimate remote access software that can be abused by adversaries for persistence and command-and-control access.
Detects the execution of MeshCentral remote management agent (meshagent.exe) or activity associated with its default installation paths and markers. MeshCentral is legitimate remote access software that can be abused by adversaries for persistence and command-and-control access.
Detects web server processes (e.g., w3wp.exe, nginx.exe, tomcat.exe) spawning command-line interpreters or utilities that could indicate remote code execution, web shell activity, or post-exploitation discovery/download attempts.
Detects web server processes (e.g., w3wp.exe, nginx.exe, tomcat.exe) spawning command-line interpreters or utilities that could indicate remote code execution, web shell activity, or post-exploitation discovery/download attempts.
This rule detects the use of common command-line utilities (grep, find, bash, sh, awk) to search for sensitive files, such as SSH keys, configuration files containing credentials, or password-related patterns. The rule includes exclusions for common administrative, security, and backup tools that might legitimately perform such scans.
This rule detects the use of common command-line utilities (grep, find, bash, sh, awk) to search for sensitive files, such as SSH keys, configuration files containing credentials, or password-related patterns. The rule includes exclusions for common administrative, security, and backup tools that might legitimately perform such scans.
This rule detects modifications or creation of the SSH 'authorized_keys' file, often used to establish unauthorized persistent access via SSH key-based authentication. It monitors both file system changes and command-line execution patterns involving SSH key injection commands (e.g., echo, cat, redirection) while filtering out known management agent activity.
Detects SSH persistence planted during the Red Heron campaign: authorized_keys file writes under a .ssh folder, correlated with process command lines referencing authorized_keys and the operator's observed key comment naming pattern (backdoor / root-shell).
Detects various methods and tools used by adversaries to access, stage, or exfiltrate the Active Directory database (ntds.dit). This includes abuse of built-in Windows utilities such as ntdsutil, vssadmin, diskshadow, esentutl, and registry commands, as well as the use of known credential dumping tools like Impacket's SecretsDump and NinjaCopy.
Detects the execution of the Cloudflare Tunnel client (cloudflared.exe) on Windows endpoints by monitoring process command line arguments, such as 'tunnel', 'run', or 'proxy-dns'. This tool can be used to establish unauthorized remote access tunnels, potentially bypassing firewall configurations.
Detects suspicious service installation patterns involving WmiPrvSE, common in lateral movement techniques.
Detects the execution of ServiceModelReg.exe following parent process activity involving vsdbg.dll/vsdbg.exe, coupled with cross-process access indicators consistent with COM Elevation Moniker UAC bypass and potential process hollowing. This pattern is associated with the PUROSANGUE loader chain used to execute malicious code within a high-integrity process context.
Detects the silent installation of remote monitoring and management (RMM) software using 'msiexec.exe' initiated by scripting engines (powershell.exe, wscript.exe, or cscript.exe). The rule targets installations occurring in user-writable directories, such as Temp or Downloads, which are common staging locations for malicious droppers, while excluding known legitimate software deployment paths.
This rule detects network connections or process command lines associated with known malicious domains, IP addresses, or payload URLs. Additionally, it correlates connections to common public file-sharing platforms or APIs (e.g., Gofile, Telegram) if these events occur on the same device within a 60-minute window of a confirmed malicious infrastructure event, reducing false positives from legitimate uses of shared infrastructure.
Detects the execution of base64 encoded PowerShell commands initiated by conhost.exe with the --headless flag. The decoded command contains specific suspicious patterns, including accessing environment variables, reading file content, and deleting files, which is characteristic of malicious scripts attempting to stealthily interact with the environment.
Detects the execution of base64 encoded PowerShell commands initiated by conhost.exe with the --headless flag. The decoded command contains specific suspicious patterns, including accessing environment variables, reading file content, and deleting files, which is characteristic of malicious scripts attempting to stealthily interact with the environment.
Detects the execution of PowerShell with encoded commands, specifically when initiated by a 'conhost.exe' process running with the '--headless' flag. The rule further inspects the decoded command to identify patterns indicative of .NET reflection-based code execution, often used in malicious activity such as reflective assembly loading.
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