Splunk Security
@SplunkSecurity35 followers31,483 downloads1,598 copies11 likes89,314 views
2,505 detections
Filters
Last updated
All Time
Detection languages
2,505
Categories
834
530
264
239
208
Platforms
1,611
260
203
142
100
Products / Services
1,231
900
795
217
212
MITRE Techniques
932
663
511
497
306
CVEs
18
13
12
10
9
The following analytic identifies anomalous network traffic volumes between Kubernetes workloads or between a workload and external sources. It leverages Network Performance Monitoring metrics collected via an OTEL collector and pulled from Splunk Observability Cloud. The detection compares recent network metrics (tcp.bytes, tcp.new_sockets, tcp.packets, udp.bytes, udp.packets) over the last hour with the average over the past 30 days to identify significant deviations. This activity is significant as unexpected spikes may indicate unauthorized data transfers or lateral movement. If confirmed malicious, it could lead to data exfiltration or compromise of additional services, potentially resulting in data breaches.
This analytic detects the use of `New-CIMSession` followed by `Invoke-CIMMethod` within PowerShell. This combination is significant because it mimics the behavior of `Invoke-WMIMethod`, which is often used for remote code execution, particularly via NTLMv2 pass-the-hash authentication. Detection relies on PowerShell Script Block Logging (EventCode 4104) to identify these cmdlets in the `ScriptBlockText` field. Successful exploitation could lead to unauthorized remote command execution and system control.
This analytic detects the execution of the Invoke-ShareFinder PowerShell cmdlet from PowerView. This detection leverages PowerShell Script Block Logging to identify instances where this specific command is executed. Monitoring this activity is crucial as it indicates an attempt to enumerate network file shares, which may contain sensitive information such as backups, scripts, and credentials. If confirmed malicious, this activity could enable an attacker to escalate privileges or move laterally within the network, potentially compromising additional systems and sensitive data.
The analytic detects the execution of the Get-GPPPassword or Get-CachedGPPPassword PowerShell cmdlets, which are used to search for unsecured credentials in Group Policy Preferences (GPP). This detection leverages PowerShell Script Block Logging to identify specific script block text associated with these cmdlets. Monitoring this activity is crucial as it can indicate an attempt to retrieve and decrypt stored credentials from SYSVOL, potentially leading to unauthorized access. If confirmed malicious, this activity could allow an attacker to escalate privileges or move laterally within the network by exploiting exposed credentials.
This detection identifies when an Azure Service Principal elevates privileges by adding itself to a new app role assignment. This activity is indicative of privilege escalation within an Azure Active Directory environment, where a service principal grants itself additional permissions.
The analytic detects the use of the `Enter-PSSession` cmdlet to establish an interactive session on a remote endpoint via the WinRM protocol. It leverages PowerShell Script Block Logging (EventCode=4104) to identify this activity by searching for specific script block text patterns. This behavior is significant as it may indicate lateral movement or remote code execution attempts by adversaries. If confirmed malicious, this activity could allow attackers to execute commands remotely, potentially leading to further compromise of the network and unauthorized access to sensitive information.
This analytic identifies anomalously high outbound network activity from processes within Kubernetes containerized workloads. It compares recent network metrics (TCP/UDP bytes, new sockets, packets) over the last hour against the average metrics from the past 30 days. Significant deviations may indicate data exfiltration, process modification, or container compromise, potentially leading to unauthorized data transfer or further attacks within the containerized environment.
The analytic identifies anomalous inbound network traffic volumes from processes within containerized workloads. It leverages Network Performance Monitoring metrics collected via an OTEL collector and pulled from Splunk Observability Cloud. The detection compares recent metrics (tcp.bytes, tcp.new_sockets, tcp.packets, udp.bytes, udp.packets) over the last hour with the average over the past 30 days. This activity is significant as it may indicate unauthorized data reception, potential breaches, vulnerability exploitation, or malware propagation. If confirmed malicious, it could lead to command and control installation, data integrity damage, container escape, and further environment compromise.
This analytic detects PowerShell scripts that create thread mutexes, identified by the presence of "Threading.Mutex" in PowerShell Script Block Logging (EventCode 4104). This technique is often used by malware to ensure only a single instance of a malicious script runs on a compromised system, which can indicate sophisticated malware or persistence mechanisms. Such activity could allow an attacker to maintain exclusive control over a process, potentially leading to further exploitation or persistence within the environment.
This analytic detects the execution of the PowerShell command 'Get-Clipboard' to retrieve clipboard data. It leverages PowerShell Script Block Logging (EventCode 4104) to identify instances where this command is used. This activity is significant because it can indicate an attempt to steal sensitive information such as usernames, passwords, or other confidential data copied to the clipboard. If confirmed malicious, this behavior could lead to unauthorized access to sensitive information, potentially compromising user accounts and other critical assets.
Page 106 of 251