Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects potentially suspicious child processes launched via the ScreenConnect client service. This rule specifically looks for common Windows utilities being executed from a temporary ScreenConnect directory, which can indicate post-exploitation activity by an adversary using the remote access tool.
Detects HTTP requests containing the URI pattern '/asp.asp?ui=' which is known to be used by the Chafer malware for command and control communication to receive data from its C2 server.
Detects potential CSharp Streamer RAT loading a .NET executable image by identifying a specific file name pattern and path commonly associated with the tool. This rule looks for image loads from a temporary directory with a filename matching 'dat[0-9A-Z]{4}\.tmp'.
Detects the execution of Action1, a Remote Monitoring and Management (RMM) tool, for arbitrary code execution or to establish remote sessions. The rule identifies these activities by looking for specific command-line patterns associated with Action1 agent deployments, script execution (via cmd.exe or powershell.exe), and the initiation of remote sessions through 'agent1_remote.exe'. The description also provides hunting opportunities to refine detection by baselining policy names and identifying remote sessions during abnormal hours.
Detects logons using NTLM to hosts that are potentially not part of the domain, specifically targeting Remote Desktop Protocol (RDP) connections. This could indicate an attempt to establish remote access to systems outside of the managed domain, potentially for lateral movement or persistence.
Detects incoming network connections to the AnyDesk remote access application. This activity could indicate an adversary attempting to establish a remote command and control channel or gain unauthorized access to a system using a legitimate remote access tool.
This rule detects attempts to hijack the Amazon SSM Agent on Linux systems. Specifically, it looks for the 'amazon-ssm-agent' executable being run with command-line arguments indicative of registration with a new code, ID, and region. This behavior is consistent with the technique described in the Mitiga research report where the SSM agent can be abused as a remote access trojan for persistence and command and control.
Detects the presence and execution of the Inveigh hack tool by monitoring for the creation of its characteristic log and executable files. Inveigh is a PowerShell-based tool used for network sniffing, LLMNR/NBNS/mDNS spoofing, and NTLM relay attacks.
Detects the execution of the Microsoft Quick Assist tool, 'QuickAssist.exe'. This utility can be leveraged by attackers to gain remote access to a system, often in social engineering attacks leading to further compromise like ransomware.
This rule detects the installation of the TacticalRMM agent service on a Windows system. It specifically looks for Event ID 7045 from the 'Service Control Manager' provider, indicating a service installation, and then checks if the 'ImagePath' contains 'tacticalrmm.exe' or the 'ServiceName' contains 'TacticalRMM Agent Service'. TacticalRMM is a legitimate remote monitoring and management (RMM) tool, but it can be abused by adversaries for remote access and control.
Detects DNS queries to legitimate TeamViewer domains originating from an application that is not identified as TeamViewer. This behavior can indicate an adversary attempting to obfuscate their use of remote access software by renaming the executable or using a different process to initiate the connection.
Detects AnyDesk writing binary files to disk other than "gcapi.dll". According to RedCanary research, it is highly abnormal for AnyDesk to write executable files to disk besides gcapi.dll, which is a legitimate DLL that is part of the Google Chrome web browser used to interact with the Google Cloud API.
This rule detects the creation of temporary installation artifacts for GoToAssist Remote Support Expert in the user's AppData\Local\Temp directory. Adversaries often use legitimate remote access tools like GoToAssist to establish command and control, and the presence of these temporary files can indicate such activity.
This rule detects the creation of 'TeamViewer_Desktop.exe' on a Windows system. This file is typically created during the installation of TeamViewer, a legitimate remote access tool. Adversaries often abuse such tools for command and control, making its installation a potential indicator of compromise.
This rule detects the creation or modification of files containing the string '\Bin\ScreenConnect.' in their target filename. This pattern is indicative of temporary installation artifacts for ScreenConnect, a legitimate remote access tool that can be abused by adversaries for command and control or remote access. The rule aims to identify the presence of these artifacts, which could signal the installation or use of ScreenConnect on a system.
Detects the download of Ursnif malware based on specific URL patterns and a successful HTTP status code. The rule looks for URIs containing a forward slash, '.php?l=', and ending with '.cab', combined with an HTTP status code of 200, indicating a successful download.
This rule detects the creation of processes associated with UltraVNC Viewer, a legitimate remote access software. Adversaries often use such tools to establish command and control (C2) channels to target systems, enabling remote interaction and control. The rule specifically looks for process creation events where the description is 'VNCViewer', the product is 'UltraVNC VNCViewer', the company is 'UltraVNC', or the original filename is 'VNCViewer.exe'.
Detects Ursnif C2 traffic by identifying specific URL patterns in proxy logs. The rule looks for URIs containing base64-like encoding indicators ('_2f', '_2b') in combination with specific file extensions and directory names ('.avi' and '/images/'). This combination is indicative of Ursnif malware's command and control communication.
Detects network communication patterns associated with the Turla ComRAT malware, specifically looking for HTTP/HTTPS requests containing '/index/index.php?h=' in the URI. This pattern is indicative of ComRAT's command and control (C2) communication.
This rule detects DNS queries made to domains frequently used by threat actors for hosting malware payloads or for URL redirection via shortener services. The identified domains include those associated with platforms like Cloudflare Workers, TryCloudflare, InfinityFree, and URL shorteners such as tinyurl and lihi.cc. Such DNS activity can be an indicator of potential malware delivery attempts or command-and-control (C2) communications.
Detects the silent installation of AnyDesk Remote Desktop, which can be used by attackers to gain remote access to a system. The rule specifically looks for the command-line arguments '--install', '--start-with-win', and '--silent' used together during process creation.
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