Splunk Security
@SplunkSecurity35 followers31,507 downloads1,688 copies11 likes90,248 views
2,515 detections
Filters
Last updated
All Time
Detection languages
2,515
Categories
839
535
265
240
208
Platforms
1,613
264
203
142
100
Products / Services
1,234
902
796
217
212
MITRE Techniques
935
667
517
499
307
CVEs
18
13
12
12
9
The following analytic identifies attempts to stop services on a system using `net.exe`, `sc.exe` or the "Stop-Service" cmdlet. It leverages Endpoint Detection and Response (EDR) telemetry. This activity can be significant as adversaries often terminate security or critical services to evade detection and further their objectives. If confirmed malicious, this behavior could allow attackers to disable security defenses, facilitate ransomware encryption, or disrupt essential services, leading to potential data loss or system compromise.
The following analytic detects the use of net.exe to update user account policies to set passwords as non-expiring. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on command-line executions involving "/maxpwage:unlimited" or "/maxpwage:49710", which achieve a similar outcome theoretically. This activity is significant as it can indicate an attempt to maintain persistence, escalate privileges, evade defenses, or facilitate lateral movement. If confirmed malicious, this behavior could allow an attacker to maintain long-term access to compromised accounts, potentially leading to further exploitation and unauthorized access to sensitive information.
The analytic detects `CertUtil.exe` performing a backup of the Certificate Store. This activity is significant because it may indicate an attempt to steal authentication certificates, which are critical for secure communications. If confirmed malicious, an attacker could use the stolen certificates to impersonate users, decrypt sensitive data, or gain unauthorized access to systems, leading to severe security breaches.
The following analytic detects the use of the PowerShell cmdlet 'export-certificate' executed via the command line, indicating an attempt to export a certificate from the local Windows Certificate Store. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on process execution logs and command-line arguments. Exporting certificates is significant as it may indicate credential theft or preparation for man-in-the-middle attacks. If confirmed malicious, this activity could allow an attacker to impersonate users, decrypt sensitive communications, or gain unauthorized access to systems and data.
The analytic detects the use of the PowerShell cmdlet `Export-PfxCertificate` on the command line, indicating an attempt to export a certificate from the local Windows Certificate Store. This activity is significant as it may indicate an attempt to exfiltrate authentication certificates, which can be used to impersonate users or decrypt sensitive data. If confirmed malicious, this could lead to unauthorized access and potential data breaches.
The following analytic detects the execution of the Windows built-in tool netsh.exe to display the state, configuration, and profile of the host firewall. This detection leverages data from Endpoint Detection and Response (EDR) agents, focusing on command-line executions and process metadata. Monitoring this activity is crucial as netsh.exe can be used by adversaries to bypass firewall rules or discover firewall settings. If confirmed malicious, this activity could allow attackers to manipulate firewall configurations, potentially leading to unauthorized network access or data exfiltration.
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.
The following analytic identifies instances of the WinDBG process spawning AutoIt3. This behavior is detected by monitoring endpoint telemetry for processes where 'windbg.exe' is the parent process and 'autoit3.exe' or similar is the child process. This activity is significant because AutoIt3 is frequently used by threat actors for scripting malicious automation, potentially indicating an ongoing attack. If confirmed malicious, this could allow attackers to automate tasks, execute arbitrary code, and further compromise the system, leading to data exfiltration or additional malware deployment.
This analytic detects the creation of WMI temporary event subscriptions by monitoring Windows Event Log EventCode 5860. Attackers frequently leverage WMI for command execution, information gathering, and persistence on compromised systems. The detection identifies these activities, which, if malicious, could lead to arbitrary code execution, privilege escalation, or persistent access. Analysts should investigate the WMI queries to determine their intent, being mindful of potential false positives from legitimate administrative tasks. The rule specifically excludes known benign WMI subscriptions related to `wsmprovhost.exe` and antivirus/firewall/antispyware product monitoring.
The following analytic detects a suspicious modification of the registry aimed at bypassing User Account Control (UAC) by leveraging WSReset.exe. It identifies the creation or modification of specific registry values under the path "*\AppX82a6gwre4fdg3bt635tn5ctqjf8msdd2\Shell\open\command*". This detection uses data from Endpoint Detection and Response (EDR) agents, focusing on process and registry events. This activity is significant because UAC bypass techniques can allow attackers to execute high-privilege actions without user consent. If confirmed malicious, this could lead to unauthorized code execution and potential system compromise.
Page 232 of 252