deardaniel/secdata-raw huggingface dataset:
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Nasreddine Bencherchali, Splunk
Date: 2026-04-15

Description:
The following analytic detects access, deletion or modification of the ssh_config file on Linux systems.
It leverages data from Linux Auditd, focusing on events of type PATH with a nametype of ("NORMAL", "CREATE", "DELETE").
This activity could be significant because unauthorized changes to ssh_config can allow threat actors to redirect port connections or use unauthorized keys, potentially compromising the system.
Correlate this with related EXECVE or PROCTITLE events to identify the process or user responsible for the access or modification.
If confirmed malicious, this could lead to unauthorized access, privilege escalation, or persistent backdoor access, posing a severe security risk.


References:
  - https://www.hackingarticles.in/ssh-penetration-testing-port-22/
  - https://attack.mitre.org/techniques/T1098/004/
Sigma Detection Rule: 
Repository: splunk/security_content
Status: experimental
Author: Rico Valdez, Splunk
Date: 2026-04-07

Description:
The following analytic detects the creation of permanent event subscriptions using Windows Management Instrumentation (WMI). It leverages Sysmon EventID 5 data to identify instances where the event consumers are not the expected "NTEventLogEventConsumer." This activity is significant because it suggests an attacker is attempting to achieve persistence by running malicious scripts or binaries in response to specific system events. If confirmed malicious, this could lead to severe impacts such as data theft, ransomware deployment, or other damaging outcomes. Investigate the associated scripts or binaries to identify the source of the attack.
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic detects the creation of files in the Windows %startup% folder, a common persistence technique. It leverages the Endpoint.Filesystem data model to identify file creation events in this specific directory. This activity is significant because adversaries often use the startup folder to ensure their malicious code executes automatically upon system boot or user logon. If confirmed malicious, this could allow attackers to maintain persistence on the host, potentially leading to further system compromise and unauthorized access to sensitive information.

References:
  - https://attack.mitre.org/techniques/T1204/002/
  - https://www.fortinet.com/blog/threat-research/chaos-ransomware-variant-sides-with-russia
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-05-04

Description:
The following analytic identifies the execution of the 'pkill' command, which is used to terminate processes on a Linux system. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions. This activity is significant because threat actors often use 'pkill' to disable security defenses or terminate critical processes, facilitating further malicious actions. If confirmed malicious, this behavior could lead to the disruption of security applications, enabling attackers to evade detection and potentially corrupt or destroy files on the targeted system.

References:
  - https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/overview-of-the-cyber-weapons-used-in-the-ukraine-russia-war/
  - https://cert.gov.ua/article/3718487
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic detects the creation or connection to a named pipe associated with Trickbot malware. It leverages Sysmon EventCodes 17 and 18 to identify named pipes with the pattern "\\pipe\\*lacesomepipe". This activity is significant as Trickbot uses named pipes for communication with its command and control (C2) servers, facilitating data exfiltration and command execution. If confirmed malicious, this behavior could allow attackers to maintain persistence, execute arbitrary commands, and exfiltrate sensitive information from the compromised system.

References:
  - https://labs.vipre.com/trickbot-and-its-modules/
  - https://whitehat.eu/incident-response-case-study-featuring-ryuk-and-trickbot-part-2/
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic detects suspicious system network configuration discovery activities, which may indicate an adversary's attempt to gather information about the network environment. Such actions typically involve commands or tools used to identify network interfaces, routing tables, and active connections. Detecting these activities is crucial, as they often precede more targeted attacks like lateral movement or data exfiltration. By identifying unusual or unauthorized network discovery efforts, this analytic helps security teams to swiftly detect and respond to potential reconnaissance operations, mitigating the risk of further compromise.

References:
  - https://www.splunk.com/en_us/blog/security/deep-dive-on-persistence-privilege-escalation-technique-and-detection-in-linux-platform.html
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Bhavin Patel, Michael Haag, Splunk
Date: 2026-04-15

Description:
The following analytic detects the execution of "mshta.exe" with inline protocol handlers such as "JavaScript", "VBScript", and "About". It leverages data from Endpoint Detection and Response (EDR) agents, focusing on command-line arguments and process details. This activity is significant because mshta.exe can be exploited to execute malicious scripts, potentially leading to unauthorized code execution. If confirmed malicious, this could allow an attacker to execute arbitrary code, escalate privileges, or establish persistence within the environment, posing a severe security risk.

References:
  - https://github.com/redcanaryco/AtomicTestHarnesses
  - https://redcanary.com/blog/introducing-atomictestharnesses/
  - https://docs.microsoft.com/en-us/windows/win32/search/-search-3x-wds-extidx-prot-implementing
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk, Sanjay Govind
Date: 2026-04-15

Description:
The following analytic detects the suspicious creation of msmpeng.exe or mpsvc.dll in non-default Windows Defender folders. It leverages the Endpoint.Filesystem datamodel to identify instances where these files are created outside their expected directories. This activity is significant because it is associated with the REvil ransomware, which uses DLL side-loading to execute malicious payloads. If confirmed malicious, this could lead to ransomware deployment, resulting in data encryption, system compromise, and potential data loss or extortion.

References:
  - https://community.sophos.com/b/security-blog/posts/active-ransomware-attack-on-kaseya-customers
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Michael Haag, Nasreddine Bencherchali, Splunk
Date: 2026-05-04

Description:
The following analytic identifies attempts to disable Windows Defender
real-time behavior monitoring via PowerShell commands. It detects the use of specific
`Set-MpPreference` parameters that disable various security features. This activity
is significant as it is commonly used by malware such as RATs, bots, or Trojans
to evade detection by disabling antivirus protections. If confirmed malicious, this
action could allow an attacker to operate undetected, leading to potential data
exfiltration, further system compromise, or persistent access within the environment.


References:
  - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1562.001/T1562.001.md#atomic-test-15---tamper-with-windows-defender-atp-powershell
  - https://docs.microsoft.com/en-us/powershell/module/defender/set-mppreference?view=windowsserver2022-ps
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Michael Haag, Splunk
Date: 2026-04-15

Description:
The following analytic detects the execution of Syncappvpublishingserver.vbs via wscript.exe or cscript.exe, which may indicate an attempt to download remote files or perform privilege escalation. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions. Monitoring this activity is crucial as it can signify malicious use of a native Windows script for unauthorized actions. If confirmed malicious, this behavior could lead to unauthorized file downloads or elevated privileges, posing a significant security risk.

References:
  - https://lolbas-project.github.io/lolbas/Scripts/Syncappvpublishingserver/
  - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1216/T1216.md#atomic-test-1---syncappvpublishingserver-signed-script-powershell-command-execution
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Steven Dick, Bhavin Patel, Rod Soto, Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic detects the presence of a registry key associated with the Remcos RAT agent on a host. It leverages data from the Endpoint.Processes and Endpoint.Registry data models in Splunk, focusing on instances where the "license" key is found in the "Software\Remcos" path. This behavior is significant as it indicates potential compromise by the Remcos RAT, a remote access Trojan used for unauthorized access and data exfiltration. If confirmed malicious, the attacker could gain control over the system, steal sensitive information, or use the compromised host for further attacks. Immediate investigation and remediation are required.

References:
  - https://attack.mitre.org/software/S0332/
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Michael Haag, Splunk
Date: 2026-04-15

Description:
The following analytic detects the creation of an lsass.exe process dump using Windows Task Manager. It leverages Sysmon EventID 11 to identify file creation events where the target filename matches *lsass*.dmp. This activity is significant because creating an lsass dump can be a precursor to credential theft, as the dump file contains sensitive information such as user passwords. If confirmed malicious, an attacker could use the lsass dump to extract credentials and escalate privileges, potentially compromising the entire network.

References:
  - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1003.001/T1003.001.md#atomic-test-5---dump-lsassexe-memory-using-windows-task-manager
  - https://attack.mitre.org/techniques/T1003/001/
  - https://2017.zeronights.org/wp-content/uploads/materials/ZN17_Kheirkhabarov_Hunting_for_Credentials_Dumping_in_Windows_Environment.pdf
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic detects instances where file or folder permissions are modified to grant read-only access. Such changes are characterized by the presence of read-related permissions (e.g., R, REA, RA, RD) and the absence of write (W) or execute (E) permissions. Monitoring these events is crucial for tracking access control changes that could be intentional for restricting access or indicative of malicious behavior. Alerts generated by this detection help ensure that legitimate security measures are enforced while unauthorized changes are promptly investigated.

References:
  - https://www.splunk.com/en_us/blog/security/-applocker-rules-as-defense-evasion-complete-analysis.html
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic identifies the loading of four specific Windows DLLs (credui.dll, dbghelp.dll, samcli.dll, winhttp.dll) by a non-standard process. This detection leverages Sysmon EventCode 7 to monitor DLL load events and flags when all four DLLs are loaded within a short time frame. This activity is significant as it may indicate the presence of Brute Ratel C4, a sophisticated remote access tool used for credential dumping and other malicious activities. If confirmed malicious, this behavior could lead to unauthorized access, credential theft, and further compromise of the affected system.

References:
  - https://unit42.paloaltonetworks.com/brute-ratel-c4-tool/
  - https://www.mdsec.co.uk/2022/08/part-3-how-i-met-your-beacon-brute-ratel/
  - https://strontic.github.io/xcyclopedia/library/logoncli.dll-138871DBE68D0696D3D7FA91BC2873B1.html
  - https://strontic.github.io/xcyclopedia/library/credui.dll-A5BD797BBC2DD55231B9DE99837E5461.html
  - https://docs.microsoft.com/en-us/windows/win32/secauthn/credential-manager
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Mauricio Velazco, Splunk
Date: 2026-04-15

Description:
The following analytic detects the execution of `sc.exe` with command-line arguments used to start a Windows Service on a remote endpoint. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on process names and command-line executions. This activity is significant because adversaries may exploit the Service Control Manager for lateral movement and remote code execution. If confirmed malicious, this could allow attackers to execute arbitrary code on remote systems, potentially leading to further compromise and persistence within the network.

References:
  - https://docs.microsoft.com/en-us/windows/win32/services/controlling-a-service-using-sc
  - https://attack.mitre.org/techniques/T1543/003/
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following 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.

References:
  - https://app.any.run/tasks/c0f98850-af65-4352-9746-fbebadee4f05/
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2025-05-02

Description:
The following analytic detects a suspicious modification to the Windows Update configuration registry key "UseWUServer." It leverages data from the Endpoint.Registry data model to identify changes where the registry value is set to "0x00000001." This activity is significant because it is commonly used by adversaries, including malware like RedLine Stealer, to bypass detection mechanisms and potentially exploit zero-day vulnerabilities. If confirmed malicious, this modification could allow attackers to evade defenses, persist on the target host, and deploy additional malicious payloads.

References:
  - https://learn.microsoft.com/de-de/security-updates/windowsupdateservices/18127499
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic detects the execution of mshta.exe via registry entries to run malicious scripts. It leverages registry activity logs to identify entries containing "mshta," "javascript," "vbscript," or "WScript.Shell." This behavior is significant as it indicates potential fileless malware, such as Kovter, which uses encoded scripts in the registry to persist and execute without files. If confirmed malicious, this activity could allow attackers to maintain persistence, execute arbitrary code, and evade traditional file-based detection methods, posing a significant threat to system integrity and security.

References:
  - https://redcanary.com/threat-detection-report/techniques/mshta/
  - https://learn.microsoft.com/en-us/microsoft-365/security/intelligence/fileless-threats?view=o365-worldwide
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic detects the use of PowerShell scripts to archive files into a temporary folder. It leverages PowerShell Script Block Logging, specifically monitoring for the `Compress-Archive` command targeting the `Temp` directory. This activity is significant as it may indicate an adversary's attempt to collect and compress data for exfiltration. If confirmed malicious, this behavior could lead to unauthorized data access and exfiltration, posing a severe risk to sensitive information and overall network security.

References:
  - https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-347a
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic identifies instances where four or more distinct detection analytics are associated with malicious command line behavior on a specific host. This detection leverages the Command Line Interface (CLI) data from various sources to identify suspicious activities. This behavior is significant as it often indicates attempts to execute malicious commands, access sensitive data, install backdoors, or perform other nefarious actions. If confirmed malicious, attackers could gain unauthorized control, exfiltrate information, escalate privileges, or launch further attacks within the network, leading to severe compromise.

References:
  - https://www.splunk.com/en_us/blog/security/from-macros-to-no-macros-continuous-malware-improvements-by-qakbot.html
  - https://www.splunk.com/en_us/blog/security/dark-crystal-rat-agent-deep-dive.html
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Michael Haag, Splunk
Date: 2026-04-15

Description:
This analytic detects attempts to create an "ESX Admins" group using the Windows net.exe or net1.exe commands. This activity may indicate an attempt to exploit the VMware ESXi Active Directory Integration Authentication Bypass vulnerability (CVE-2024-37085). Attackers can use this method to gain unauthorized access to ESXi hosts by recreating the "ESX Admins" group after its deletion from Active Directory.

References:
  - https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/24505
  - https://www.microsoft.com/en-us/security/blog/2024/07/29/ransomware-operators-exploit-esxi-hypervisor-vulnerability-for-mass-encryption/
  - https://www.securityweek.com/microsoft-says-ransomware-gangs-exploiting-just-patched-vmware-esxi-flaw/
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Patrick Bareiss, Splunk
Date: 2026-04-15

Description:
The following analytic detects the creation of a remote thread in the Local Security Authority Subsystem Service (LSASS). This behavior is identified using Sysmon EventID 8 logs, focusing on processes that create remote threads in lsass.exe. This activity is significant because it is commonly associated with credential dumping, a tactic used by adversaries to steal user authentication credentials. If confirmed malicious, this could allow attackers to gain unauthorized access to sensitive information, leading to potential compromise of the entire network. Analysts should investigate to differentiate between legitimate tools and potential threats.

References:
  - https://2017.zeronights.org/wp-content/uploads/materials/ZN17_Kheirkhabarov_Hunting_for_Credentials_Dumping_in_Windows_Environment.pdf
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic detects the installation of a Linux kernel module using the modprobe utility. It leverages data from Linux Auditd, focusing on process names and command-line executions. This activity is significant because installing a kernel module can indicate an attempt to deploy a rootkit or other malicious kernel-level code, potentially leading to elevated privileges and bypassing security detections. If confirmed malicious, this could allow an attacker to gain persistent, high-level access to the system, compromising its integrity and security.

References:
  - https://docs.fedoraproject.org/en-US/fedora/rawhide/system-administrators-guide/kernel-module-driver-configuration/Working_with_Kernel_Modules/
  - https://security.stackexchange.com/questions/175953/how-to-load-a-malicious-lkm-at-startup
  - https://0x00sec.org/t/kernel-rootkits-getting-your-hands-dirty/1485
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-05-04

Description:
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.

References:
  - https://x.com/malmoeb/status/[PII_REDACTED]89415386?s=20
  - https://github.com/undergroundwires/privacy.sexy
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Teoderick Contreras, Splunk
Date: 2026-04-15

Description:
The following analytic identifies potential enumeration of local network configuration on Linux systems.
It detects this activity by monitoring processes such as "arp," "ifconfig," "ip," "netstat," "firewall-cmd," "ufw," "iptables," "ss," and "route" within a 30-minute window.
This behavior is significant as it often indicates reconnaissance efforts by adversaries to gather network information for subsequent attacks.
If confirmed malicious, this activity could enable attackers to map the network, identify vulnerabilities, and plan further exploitation or lateral movement within the environment.

References:
  - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1016/T1016.md
Sigma Detection Rule: 
Repository: splunk/security_content
Status: production
Author: Raven Tait, Splunk
Date: 2026-04-13

Description:
Detects deletion of a Rollback Script (.rbs) file under C:\Config.Msi, the critical filesystem manipulation step in an MSI Rollback privilege escalation attack that converts an arbitrary file delete primitive into full SYSTEM code execution.
During a legitimate MSI installation, the Windows Installer service (running as SYSTEM) creates C:\Config.Msi and populates it with a Rollback Script (.rbs) and Rollback File (.rbf).
These files define exactly how to restore the system to its pre-installation state if the install fails.
The folder is protected with a strong DACL specifically to prevent tampering by low-privileged users — because whatever is in these files will be executed by the SYSTEM-level Installer service during rollback.

References:
  - https://github.com/mbog14/CVE-2024-44193