Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
3,122 detections
Filters
Last updated
All Time
Detection languages
1,062
796
474
242
137
Contributors
463
427
399
318
291
Categories
926
771
637
574
311
Platforms
2,112
365
219
214
142
Products / Services
487
482
389
167
150
MITRE Techniques
18,116
15,638
12,585
8,395
6,225
3,122
CVEs
12
12
8
8
5
IDS Classtypes
62
26
22
11
7
IDS Protocols
47
37
15
8
7
Detects the execution of "reg.exe" to alter registry keys that would replace the user's desktop background. This is a common technique used by malware to change the desktop background to a ransom note or other image.
Detects when an user account is locked or suspended.
Detects the use of `systemctl mask` to disable system power management targets such as suspend, hibernate, or hybrid sleep. Adversaries may mask these targets to prevent a system from entering sleep or shutdown states, ensuring their malicious processes remain active and uninterrupted. This behavior can be associated with persistence or defense evasion, as it impairs normal system power operations to maintain long-term access or avoid termination of malicious activity.
Detects PowerShell scripts leveraging System.Drawing and System.Windows.Forms to manipulate Metafile objects. This technique can be used to trigger a denial-of-service vulnerability (related to CVE-2025-53766) in the Windows GDI component by processing a specially crafted metafile.
The following analytic detects the creation of files with names commonly associated with ransomware notes. It leverages file-system activity data from the Endpoint Filesystem data model, typically populated by endpoint detection and response (EDR) tools or Sysmon logs. This activity is significant because ransomware notes indicate a potential ransomware attack, which can lead to data encryption and extortion. If confirmed malicious, this activity could result in significant data loss, operational disruption, and financial impact due to ransom demands.
This analytic identifies the bulk creation of ransomware notes (e.g., .txt, .html, .hta files) on an infected machine. It leverages Sysmon EventCode 11 to detect multiple instances of these file types being created within a short time frame (10 seconds). A detection is triggered if 15 or more unique readme paths are observed. This activity is a strong indicator of an active ransomware attack, where the attacker is notifying the victim of the encryption. If confirmed malicious, this behavior could lead to widespread data encryption, rendering critical files inaccessible and potentially causing significant operational disruption.
The following analytic detects the deletion of SSH keys or configuration files on a Linux machine. It leverages filesystem event logs to identify when files within "/etc/ssh/*" or "~/.ssh/*" are deleted. This activity is significant because attackers may delete or modify SSH keys to evade security measures or as part of a destructive payload, similar to the AcidRain malware. If confirmed malicious, this behavior could lead to impaired security features, hindered forensic investigations, or further unauthorized access, necessitating immediate investigation to identify the responsible process and user.
The following analytic detects the suspicious termination of known services commonly targeted by ransomware before file encryption. It leverages Windows System Event Logs (EventCode 7036) to identify when critical services such as Volume Shadow Copy, backup, and antivirus services are stopped. This activity is significant because ransomware often disables these services to avoid errors and ensure successful file encryption. If confirmed malicious, this behavior could lead to widespread data encryption, rendering files inaccessible and potentially causing significant operational disruption and data loss.
The following analytic detects the execution of suspicious command-line arguments commonly associated with Conti ransomware, specifically targeting local drives and network shares for encryption. 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 it indicates a potential ransomware attack, which can lead to widespread data encryption and operational disruption. If confirmed malicious, the impact could be severe, resulting in data loss, system downtime, and potential ransom demands.
This analytic detects the use of the `taskkill` command to terminate common browser processes (Chrome, Edge, Firefox, Brave, Opera, Chromium). This technique is often employed by malware, such as the Braodo stealer, to close browsers and unlock files containing sensitive information like credentials. Detecting such activity helps security teams investigate and prevent credential theft and system compromise.
This analytic detects the suspicious termination of known services commonly targeted by ransomware before file encryption. It leverages Windows System Event Logs (EventCode 7036) to identify when critical services such as Volume Shadow Copy, backup, and antivirus services are stopped. This activity is significant because ransomware often disables these services to avoid errors and ensure successful file encryption. If confirmed malicious, this behavior could lead to widespread data encryption, rendering files inaccessible and potentially causing significant operational disruption and data loss.
This rule detects activity associated with the WannaCry ransomware. It specifically looks for the creation of processes with image names commonly used by WannaCry variants (e.g., 'tasksche.exe', 'mssecsvc.exe', 'WanaDecryptor' in the image path) or command lines containing the WannaCry ransom note filename ('@Please_Read_Me@.txt').
The following analytic identifies a high frequency of process termination events on a computer within a short period. It leverages Sysmon EventCode 5 logs to detect instances where 15 or more processes are terminated within a 3-second window. This behavior is significant as it is commonly associated with ransomware attempting to avoid exceptions during file encryption. If confirmed malicious, this activity could indicate an active ransomware attack, potentially leading to widespread file encryption and significant data loss.
Detects aggressive process and service termination using taskkill.exe and sc.exe, a technique characteristic of FunkLocker ransomware.
The analytic detects modifications to files with extensions commonly associated with ransomware. It leverages the Endpoint.Filesystem data model to identify changes in file extensions that match known ransomware patterns. This activity is significant because it suggests an attacker is attempting to encrypt or alter files, potentially leading to severe data loss and operational disruption. If confirmed malicious, this activity could result in the encryption of critical data, rendering it inaccessible and causing significant damage to the organization's data integrity and availability.
This rule detects the loading of the 'vssapi.dll' library by executables that are not commonly associated with legitimate Volume Shadow Copy operations. Adversaries often interact with Volume Shadow Copy Service (VSS) DLLs to delete shadow copies, which is a common technique to inhibit system recovery and prevent data restoration after ransomware attacks or data destruction.
Detects potential Distributed Denial of Service (DDoS) attacks or rate limit abuse against Ollama API endpoints by identifying excessive request volumes from individual client IP addresses. This detection monitors GIN-formatted Ollama server logs to identify clients generating abnormally high request rates within short time windows, which may indicate automated attacks, botnet activity, or resource exhaustion attempts targeting local AI model infrastructure.
The analytic identifies a high frequency of file deletions by monitoring Sysmon EventCodes 23 and 26 for specific file extensions. This detection leverages Sysmon logs to track deleted target filenames, process names, and process IDs. Such activity is significant as it often indicates ransomware behavior, where files are encrypted and the originals are deleted. If confirmed malicious, this activity could lead to extensive data loss and operational disruption, as ransomware can render critical files inaccessible, demanding a ransom for their recovery.
Detects the image load of 'vsstrace.dll' by executables that are not typically associated with legitimate Windows operations or known backup solutions. This behavior can indicate an adversary attempting to manipulate or delete Volume Shadow Copies, often as a precursor to data encryption for impact (ransomware) or to hinder system recovery.
Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activity is uncommon and provides a high certainty signal.
Detects critical service crashes, fatal errors, and abnormal process terminations in Ollama that may indicate exploitation attempts, resource exhaustion attacks, malicious input triggering unhandled exceptions, or deliberate denial of service attacks designed to disrupt AI model availability and degrade system stability. The rule aggregates multiple termination events within a 5-minute window to identify sustained instability or attack patterns.
Page 96 of 149