Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects instances where FortiClient EMS (versions 7.4.5 or 7.4.6) logs a 'Certificate not found in request header' error. This indicates that a client attempt to communicate with the EMS server failed due to missing certificate-based authentication, which could suggest misconfiguration, network issues, or potentially an unauthorized attempt to access the management interface.
Detects a potential exploitation of the SearchLeak (CVE-2026-42824) vulnerability in Microsoft 365 Copilot, where raw HTML <img> tags containing Bing Search-by-Image parameters are rendered during the streaming phase before proper sanitization occurs. This could potentially allow for SSRF or information leakage through malicious image references.
Detects instances where users grant broad permissions (e.g., Mail.Read, Files.ReadWrite) to newly registered or unknown applications. It specifically correlates these grants with device code flow authentication, a technique frequently used in OAuth consent phishing to bypass traditional authentication hurdles.
This rule detects unauthorized requests to the '/api/tokens/import/txt' endpoint, which is associated with the 'Device Code Lab' token management panel. Such activity is indicative of an attacker importing stolen session tokens to maintain persistent access to a compromised environment.
This rule detects the creation of unauthorized technician accounts in the SimpleHelp RMM platform that follow an OIDC authentication bypass pattern (CVE-2026-48558). It correlates server logs indicating 'New Anon' registration activity with Windows Security Event ID 4720 (User account created), specifically filtering for accounts that do not belong to trusted corporate domains.
Detects unauthorized attempts by low-privileged API tokens to access sensitive Argo CD endpoints related to Git repository credentials and project configurations. This rule specifically monitors for exploitation patterns associated with CVE-2025-55190, where tokens with read-only access could retrieve secrets they are not authorized to view.
Detects a single authenticated user account or client performing a high volume of requests to sequential object IDs on the same API path within a short window. This pattern is characteristic of Broken Object Level Authorization (BOLA) or Insecure Direct Object Reference (IDOR) exploitation, where an attacker attempts to gain unauthorized access to data records that do not belong to them by iterating through predictable numeric identifiers.
Detects high-volume, unauthenticated REST API requests to ServiceNow endpoints, specifically those identified as coming from a 'guest' user account or lacking authentication tokens, which may indicate reconnaissance, vulnerability scanning, or automated data extraction attempts.
Detects the use of foreground services and WakeLock mechanisms on Android, which can be leveraged by malicious applications like PromptSpy to maintain persistence and prevent the application from being terminated by the system.
Detects unauthenticated HTTP requests to sensitive Gitea endpoints containing the 'X-WEBAUTH-USER' header set to 'admin'. This rule identifies exploitation attempts against misconfigured Docker deployments where 'REVERSE_PROXY_TRUSTED_PROXIES' is improperly set to a wildcard, allowing unauthorized users to impersonate administrative accounts (CVE-2026-20896).
This rule detects the creation or modification of inbox rules in Office 365 that involve email forwarding or redirection to external domains. It calculates a risk score based on whether the action occurred outside of typical business hours (08:00-18:00 local time/weekends) and whether the user is performing this action from a previously unseen IP address, which may indicate a compromised account attempting to exfiltrate or redirect emails.
This rule detects attempts to exploit Microsoft 365 Copilot through prompt injection, where attackers inject HTML/script elements into search queries. It specifically identifies when these queries attempt to force Copilot to interact with external URLs via Bing image search (SSRF), potentially exfiltrating sensitive data such as MFA codes, email content, or meeting details to an attacker-controlled external domain.
Detects signs of a supply chain attack, specifically referencing the IronWorm/Shai-Hulud pattern, involving the backdating of git commits, manipulation of git environment variables (GIT_COMMITTER_DATE/GIT_AUTHOR_DATE) to mask malicious activity history, and the use of 'touch' commands to modify file timestamps on project-related binaries and configuration files.
Detects OAuth consent grants or permission additions in Microsoft Entra ID (Azure AD) audit logs that occur in conjunction with device login flow artifacts. This pattern is indicative of 'ConsentFix' or device code phishing attacks, where users are manipulated into authorizing malicious applications, potentially bypassing MFA requirements by using the device code flow.
This rule detects potential brute force attacks against Microsoft Exchange Outlook Web App (OWA) by monitoring for a high volume of 401 Unauthorized status codes from non-internal IP addresses. It also correlates these authentication events with subsequent post-authentication actions, specifically identifying mailbox logins followed by mailbox searching or export requests, which may indicate account compromise and unauthorized data collection or exfiltration.
Detects malicious Parameter-to-Prompt (P2P) injection attempts targeting Microsoft 365 Copilot by monitoring search query parameters for indicators of natural-language command injection or HTML-based payload injection (e.g., img tags, source manipulation, or data extraction commands).
Detects Microsoft Exchange EWS (Exchange.asmx) requests containing a ReferenceAttachment call where the ProviderEndpointUrl parameter points to a non-Microsoft/external domain. This is consistent with SSRF exploitation techniques, such as those observed in CVE-2026-45504, where an attacker-controlled endpoint is provided to Exchange for fetching WOPI properties.
Detects instances where a user grants an OAuth application sensitive permissions, which could indicate an illicit consent grant attack where an adversary lures a user into authorizing a malicious application to access their email, files, or directory data.
Detects a suspicious spike in Microsoft Teams external meeting or chat invitations directed at a single user within a 30-minute window. This behavior is consistent with UNC6692 tactics, where attackers impersonate internal IT helpdesk staff via Teams to perform vishing and social engineering attacks.
Detects Microsoft Graph API requests that perform bulk enumeration of email messages across multiple folders. The rule specifically identifies API queries that request sender (From) and recipient (To, CC, BCC) fields, a behavior consistent with mailbox address harvesting or reconnaissance by an Address Extractor module.
Detects evidence of CVE-2026-48558 exploitation, where SimpleHelp servers fail to cryptographically verify OIDC tokens. This vulnerability allows unauthenticated attackers to create privileged technician accounts and bypass Multi-Factor Authentication (MFA). The rule monitors for 'New Anon' log tags in OIDC authentication flows or unauthorized HTTP POST requests to SimpleHelp technician management endpoints.
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