Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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The following analytic detects modifications to the Windows registry that disable the Windows Defender SmartScreen App Install Control feature. It leverages data from the Endpoint.Registry data model to identify changes to specific registry values. This activity is significant because disabling App Install Control can allow users to install potentially malicious web-based applications without restrictions, increasing the risk of security vulnerabilities. If confirmed malicious, this action could lead to the installation of harmful applications, potentially compromising the system and exposing sensitive information.
The following analytic detects modifications to the Windows registry entry "EnableWebContentEvaluation" to disable Windows Defender web content evaluation. It leverages data from the Endpoint.Registry datamodel, specifically monitoring changes where the registry value is set to "0x00000000". This activity is significant as it indicates an attempt to impair browser security features, potentially allowing malicious web content to bypass security checks. If confirmed malicious, this could lead to users interacting with harmful scripts or unsafe web elements, increasing the risk of system exploitation and security breaches.
The following analytic detects modifications to the Windows registry that disable Windows Defender Signature Retirement. It leverages data from the Endpoint.Registry data model, specifically monitoring changes to the DisableSignatureRetirement registry setting. This activity is significant because disabling signature retirement can prevent Windows Defender from removing outdated antivirus signatures, potentially reducing its effectiveness in detecting threats. If confirmed malicious, this action could allow an attacker to evade detection by using older, less relevant signatures, thereby compromising the system's security posture.
The following analytic detects modifications to the Windows registry that disable the Windows Defender Scan On Update feature. It leverages data from the Endpoint.Registry datamodel, specifically looking for changes to the "DisableScanOnUpdate" registry setting with a value of "0x00000001". This activity is significant because disabling automatic scans can leave systems vulnerable to malware and other threats. If confirmed malicious, this action could allow attackers to bypass Windows Defender, facilitating further compromise and persistence within the environment.
The following analytic detects modifications to the Windows registry that override the Windows Defender SmartScreen prompt. It leverages data from the Endpoint.Registry data model, specifically monitoring changes to the "PreventSmartScreenPromptOverride" registry setting. This activity is significant because it indicates an attempt to disable the prevention of user overrides for SmartScreen prompts, potentially allowing users to bypass security warnings. If confirmed malicious, this could lead to users inadvertently executing or accessing harmful content, increasing the risk of security incidents or system compromises.
This analytic detects a suspicious modification to the Windows registry that disables automatic reboot with a logged-on user. This detection leverages the Endpoint data model to identify changes to the registry path `SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU\NoAutoRebootWithLoggedOnUsers` with a value of `0x00000001`. This activity is significant as it is commonly used by adversaries, including malware like RedLine Stealer, to evade detection and maintain persistence. If confirmed malicious, this could allow attackers to bypass security measures and deploy additional payloads without interruption.
The analytic detects modifications to the Windows Error Reporting registry key "DontShowUI" to suppress error reporting dialogs. It identifies changes where the registry value is set to 0x00000001. This activity is significant as it is commonly associated with DarkGate malware, which uses this modification to avoid detection during its installation. If confirmed malicious, this behavior could allow attackers to maintain a low profile, avoiding user alerts and potentially enabling further malicious activities without user intervention.
The analytic detects modifications to the registry related to ValleyRAT C2 configuration. Specifically, it monitors changes in registry keys where ValleyRAT saves the IP address and port information of its command-and-control (C2) server. This activity is a key indicator of ValleyRAT attempting to establish persistent communication with its C2 infrastructure. By identifying these unauthorized registry modifications, security analysts can quickly detect malicious configurations and investigate the associated threats. Early detection of these changes helps prevent further exploitation and limits the malware’s ability to exfiltrate data or control infected systems.
The following analytic detects the execution of the msiexec.exe process with the /HideWindow and rundll32 command-line parameters. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process creation events and command-line arguments. This activity is significant because it is a known tactic used by malware like QakBot to mask malicious operations under legitimate system processes. If confirmed malicious, this behavior could allow an attacker to download additional payloads, execute malicious code, or establish communication with remote servers, thereby evading detection and maintaining persistence.
The following analytic identifies the execution of `net.exe` with command-line arguments used to list or display information about computer connections. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions. This activity can be significant as it indicates potential network reconnaissance by adversaries or Red Teams, aiming to gather situational awareness and Active Directory information. If confirmed malicious, this behavior could allow attackers to map the network, identify critical assets, and plan further attacks, potentially leading to data exfiltration or lateral movement.
The analytic detects the loading of the mshtml.dll module into an Office product, which is indicative of CVE-2021-40444 exploitation. It leverages Sysmon EventID 7 to monitor image loads by specific Office processes. This activity is significant because it can indicate an attempt to exploit a vulnerability in the MSHTML component via a malicious document. If confirmed malicious, this could allow an attacker to execute arbitrary code, potentially leading to system compromise, data exfiltration, or further network penetration.
The analytic identifies instances of the `searchindexer.exe` process that are not spawned by `services.exe`, indicating potential process injection. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and parent processes. This activity is significant because QakBot malware often uses a fake `searchindexer.exe` to evade detection and perform malicious actions such as data exfiltration and keystroke logging. If confirmed malicious, this activity could allow attackers to maintain persistence, steal sensitive information, and communicate with command and control servers.
The following analytic detects modifications in the Windows registry to enable remote desktop assistance on a targeted machine. It leverages data from the Endpoint.Registry datamodel, specifically monitoring changes to the "Control\\Terminal Server\\fAllowToGetHelp" registry path. This activity is significant because enabling remote assistance via registry is uncommon and often associated with adversaries or malware like Azorult. If confirmed malicious, this could allow an attacker to remotely access and control the compromised host, leading to potential data exfiltration or further system compromise.
The analytic detects the creation of the 'comadmin.dat' file in the '%windows%\system32\Com' directory. This file is associated with Snake Malware's installation process, which involves dropping a kernel driver and a custom DLL. The presence of this file indicates potential compromise, leading to privilege escalation and persistent access through a malicious kernel driver.
The following analytic detects modifications to the Windows registry under `SOFTWARE\Microsoft\Test`, a location rarely used by legitimate applications in a production environment. Monitoring this key is crucial, as adversaries may create or alter values here for monitoring update of itself file path, updated configuration file, or system mark compromised. The detection leverages **Sysmon Event ID 13** (Registry Value Set) to identify unauthorized changes. Analysts should investigate processes associated with these modifications, particularly unsigned executables or suspicious command-line activity, as they may indicate malware or unauthorized software behavior.
This analytic detects executables running from public or temporary locations that are communicating over Windows domain authentication ports/protocols such as LDAP (389), LDAPS (636), and Kerberos (88). It leverages network traffic data to identify processes originating from user-controlled directories. This activity is significant because legitimate applications rarely run from these locations and attempt domain authentication, making it a potential indicator of compromise. If confirmed malicious, attackers could leverage this to access domain resources, potentially leading to further exploitation and lateral movement within the network.
The following analytic detects the execution of "qwinsta.exe" on a Windows operating system. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process execution logs. The "qwinsta.exe" tool is significant because it can display detailed session information on a remote desktop session host server. This behavior is noteworthy as it is commonly abused by Qakbot malware to gather system information and send it back to its Command and Control (C2) server. If confirmed malicious, this activity could lead to unauthorized data exfiltration and further compromise of the host.
The following analytic detects potentially malicious processes that initiate a ping delay using an invalid IP address. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on command-line executions involving "ping 0 -n". This behavior is significant as it is commonly used by malware like NJRAT to introduce time delays for evasion tactics, such as delaying self-deletion. If confirmed malicious, this activity could indicate an active infection attempting to evade detection, potentially leading to further compromise and persistence within the environment.
The following analytic detects the execution of `net.exe` or `net1.exe` with command-line arguments `user` or `users` to query local user accounts. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions. This activity is significant as it indicates potential reconnaissance efforts by adversaries to enumerate local users, which is a common step in situational awareness and Active Directory discovery. If confirmed malicious, this behavior could lead to further attacks, including privilege escalation and lateral movement within the network.
The following analytic detects the execution of WMI command lines used to create or execute processes. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on command-line events that include specific keywords like "process," "call," and "create." This activity is significant because adversaries often use WMI to execute malicious payloads on local or remote hosts, potentially bypassing traditional security controls. If confirmed malicious, this behavior could allow attackers to execute arbitrary code, escalate privileges, or maintain persistence within the environment, posing a severe threat to organizational security.
This analytic detects suspicious `rundll32.exe` processes making DNS queries. This behavior is often associated with malware like IcedID, which uses `rundll32.exe` to check internet connectivity and communicate with command and control (C2) servers for configuration and payload downloads. Successful exploitation could lead to persistence, additional payload delivery, and data exfiltration.
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