Splunk Security
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2,496 detections
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This analytic detects excessive usage of the `sc.exe` service utility on a host machine. It leverages Sysmon EventCode 1 logs to identify instances where `sc.exe` is executed more frequently than normal within a 15-minute window. This behavior is significant as it is commonly associated with ransomware, cryptocurrency miners, and other malware attempting to create, modify, delete, or disable services, potentially related to security applications or for privilege escalation. If confirmed malicious, this activity could allow attackers to manipulate critical services, leading to system compromise or disruption of security defenses.
The analytic detects the execution of `powershell.exe` or `cmd.exe` with command-line arguments that include `Get-ADUser` and `*-filter*`. This activity indicates an attempt to enumerate domain users, which is a common reconnaissance technique used by adversaries to gather information about Active Directory users for situational awareness and to identify high-value targets for subsequent attacks.
The analytic detects the execution of the Get-ForestTrust command via PowerShell or cmd.exe. This command is commonly used by adversaries to gather domain trust information, which is a reconnaissance effort to map out domain trusts. Identifying this activity is crucial as it indicates potential reconnaissance efforts to map out domain trusts, which can inform further attacks. If confirmed malicious, this activity could allow attackers to understand domain relationships, aiding in lateral movement and privilege escalation within the network.
The analytic detects the execution of `powershell.exe` with command-line arguments used to query domain users via the `Get-WmiObject` cmdlet and `-class ds_user` parameter. This activity indicates potential reconnaissance efforts by adversaries to enumerate domain users, which is a common step in Active Directory Discovery. If confirmed malicious, this could lead to further attacks, including privilege escalation and lateral movement within the network.
The analytic detects the Java process writing a .jsp file to disk, which may indicate a web shell being deployed. This activity is significant because web shells can provide attackers with remote control over the compromised server, leading to further exploitation. If confirmed malicious, this could allow unauthorized access, data exfiltration, or further compromise of the affected system, posing a severe security risk.
The following analytic detects the use of the Advanced Package Tool (APT) with elevated privileges via sudo on Linux systems. It leverages Endpoint Detection and Response (EDR) telemetry to identify processes where APT commands are executed with sudo rights. This activity is significant because it indicates a user can run system commands as root, potentially leading to unauthorized root shell access. If confirmed malicious, this could allow an attacker to escalate privileges, execute arbitrary commands, and gain full control over the affected system, posing a severe security risk.
The analytic detects the creation of new user accounts on Linux systems using commands like "useradd" or "adduser." It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions. This activity is significant as adversaries often create new user accounts to establish persistence on compromised hosts. If confirmed malicious, this could allow attackers to maintain access, escalate privileges, and further compromise the system, posing a severe security risk.
The analytic detects the use of the AWK command with elevated privileges to execute system commands. It monitors processes that include "sudo," "awk," and "BEGIN*system" in their command lines. This activity indicates a potential privilege escalation attempt, where a user could gain root access by executing commands as the root user. If confirmed malicious, this could allow an attacker to fully compromise the system, execute arbitrary commands, and maintain persistent control over the affected endpoint.
The analytic detects the use of the Linux 'xclip' command to copy data from the clipboard. It leverages Endpoint Detection and Response (EDR) telemetry, focusing on process names and command-line arguments related to clipboard operations. This activity is significant because adversaries can exploit clipboard data to capture sensitive information such as passwords or IP addresses. If confirmed malicious, this technique could lead to unauthorized data exfiltration, compromising sensitive information and potentially aiding further attacks within the environment.
The following analytic detects the use of the 'dd' command to overwrite files on a Linux system. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process execution logs that include command-line details. This activity is significant because adversaries often use the 'dd' command to destroy or irreversibly overwrite files, disrupting system availability and services. If confirmed malicious, this behavior could lead to data destruction, making recovery difficult and potentially causing significant operational disruptions.
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