Detections

Explore public detection logic contributed by the community across SIEM and rule languages.

4,916 detections

This rule detects the creation of a new API token within the Okta identity platform. API tokens can be used for programmatic access to Okta and, if compromised, can lead to unauthorized access, persistence, or privilege escalation. The rule specifically looks for 'system.api_token.create' events with a successful 'ALLOW' action.
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Google SecOps@GoogleSecOps
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Google SecOps Detection Rules
2 years ago
0034
Detects potential exploitation attempts of CVE-2023-4966, a Citrix ADC and NetScaler Gateway sensitive information disclosure vulnerability. The rule specifically looks for GET requests to '/oauth/idp/.well-known/openid-configuration' that result in a 200 HTTP status code, indicating a successful attempt to access this specific endpoint which is part of the vulnerability exploitation chain.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0032
This rule detects when the AWS IAM AdministratorAccess policy is attached to a user, group, or role. This action grants full administrative privileges and can be used by an attacker for privilege escalation, persistence, or to establish initial access within an AWS environment. The rule specifically looks for CloudTrail events indicating policy attachment actions (AttachUserPolicy, AttachGroupPolicy, AttachRolePolicy) where the target resource is the predefined 'AdministratorAccess' policy and the action was allowed.
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Google SecOps@GoogleSecOps
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Google SecOps Detection Rules
2 years ago
0033
This rule detects when a user is assigned 'Super user' privileges within the OneLogin SSO system. It specifically looks for events where the event type is 'USER_CHANGE_PERMISSIONS', the product is 'ONELOGIN_SSO', the vendor is 'ONELOGIN', the product event type indicates a permission grant (code 72), and the target resource name is 'Super user'. This indicates a significant privilege escalation within the identity provider.
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Google SecOps@GoogleSecOps
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Google SecOps Detection Rules
2 years ago
0033
Detects exploitation activity targeting CVE-2023-46747, an unauthenticated remote code execution vulnerability in F5 BIG-IP. The rule specifically looks for POST requests to '/mgmt/tm/util/bash' containing hex-encoded or plain text strings related to '/tmui/Control/form' and 'form_page=%2ftmui%2fsystem%2fuser%2fcreate.jsp', which are indicators of the exploit attempting to create a new user.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0031
Detects potential exploitation attempt of CVE-2023-4966, a Citrix ADC and NetScaler Gateway sensitive information disclosure vulnerability, via proxy logs. This vulnerability allows for the disclosure of sensitive information, such as session tokens.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
1031
Detects exploitation attempts of CVE-2023-4966, a Citrix ADC and NetScaler Gateway sensitive information disclosure vulnerability. The rule specifically looks for GET requests to '/oauth/idp/.well-known/openid-configuration' with an unusually long 'cs-host' header string, which is characteristic of the exploit.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0030
Detects exploitation attempts of CVE-2023-22518 in Confluence Data Center / Confluence Server. This vulnerability allows an attacker to create admin accounts and execute arbitrary commands. The rule specifically looks for suspicious child processes like bash, curl, or wget being spawned by the Confluence Java process.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0029
This rule detects file modifications to ASPX and ASHX files within the root of the 'App_Extensions' directory by the 'ScreenConnect.Service.exe' process. This activity is indicative of exploitation of CVE-2024-1708, a ZipSlip vulnerability in ConnectWise ScreenConnect versions prior to 23.9.8, which allows for path traversal and arbitrary file write.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
1029
Detects when an Amazon Simple Email Service (SES) configuration is modified, which could indicate an attacker attempting to propagate phishing email campaigns. This includes the creation, deletion, or verification of email identities and domains, as well as enabling sending for accounts or configuration sets.
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Google SecOps@GoogleSecOps
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Google SecOps Detection Rules
2 years ago
0030
Detects exploitation attempts of CVE-2023-4966, a Citrix ADC and NetScaler Gateway sensitive information disclosure vulnerability. The detection logic specifically looks for GET requests to '/oauth/idp/.well-known/openid-configuration' with an unusually long host header string (150 characters or more) in proxy logs. This pattern is indicative of the 'Citrix Bleed' exploit.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
1027
Detects exploitation attempts of the OWASSRF vulnerability targeting Microsoft Exchange servers using publicly available Proof-of-Concept (POC) code. This exploit leverages the Outlook Web Access (OWA) endpoint to gain access to the PowerShell backend endpoint, indicated by specific URI patterns, HTTP method, user-agent, and a successful HTTP status code.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0026
This rule detects successful user authentications to Okta that occur outside of typical business hours or on weekends. It specifically flags logins on Saturdays and Sundays, and logins between 8 PM and 7 AM UTC on weekdays. The rule calculates a risk score based on the day and time of the login, with higher scores for weekend logins and late-night/early-morning logins.
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Google SecOps@GoogleSecOps
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Google SecOps Detection Rules
2 years ago
0027
Detects GET requests to '/SetupWizard.aspx/[anythinghere]' that indicate exploitation of the ScreenConnect vulnerability CVE-2024-1709, which is an authentication bypass vulnerability.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0025
This rule detects suspicious user login activity where a single user attempts to log in from multiple distinct countries within a 24-hour period. This behavior can indicate a compromised account being used by an attacker from a different geographic location than the legitimate user, or a user attempting to bypass security controls. The rule also assigns a higher risk score if the login originates from specific high-risk countries (Cuba, Iran, North Korea, Russia, Syria).
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Google SecOps@GoogleSecOps
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Google SecOps Detection Rules
2 years ago
0026
Detects exploitation attempts of CVE-2023-22518 in Confluence Data Center / Confluence Server, where an attacker can exploit vulnerable endpoints to create admin accounts and execute arbitrary commands. Specifically, this rule looks for suspicious child processes like cmd.exe or powershell.exe being spawned by Tomcat processes associated with Confluence.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0022
Detects exploitation attempts of CVE-2023-22518 in Confluence Data Center and Confluence Server. This vulnerability allows an attacker to exploit specific endpoints to potentially create administrator accounts and execute arbitrary commands. The rule identifies POST requests to known vulnerable URIs associated with setup and restore actions, or server information, which are indicative of an exploitation attempt.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
1022
Detects exploitation attempts of CVE-2023-22518, an improper authorization vulnerability in Confluence Data Center and Server. Attackers can exploit vulnerable endpoints to create admin accounts or execute arbitrary commands. The rule specifically looks for POST requests to known vulnerable URIs associated with setup and restore functionalities.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0019
Detects potential exploitation attempts of an undocumented Windows Server pre-authentication Remote Code Execution (RCE) vulnerability. The rule specifically looks for a new 'svchost.exe' process being created by another 'svchost.exe' process, both running with the '-k DHCPServer' command line argument, and under a Network Service account (covering multiple language settings). This pattern indicates an unusual execution flow that could be indicative of an RCE exploit targeting the DHCP Server service.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
0019
Detects instances where an HTTP service on an OpenCanary node has received a GET request.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
002
Detects instances where an HTTP service on an OpenCanary node has had login attempt via Form POST.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
2 years ago
000
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