Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects potentially malicious activities involving Microsoft Copilot and Microsoft Graph, specifically focusing on unauthorized mailbox access via non-interactive sessions and patterns indicative of Server-Side Request Forgery (SSRF) during search operations. It monitors for anomalous interaction with the Graph API, specific Copilot search parameters, and suspicious image search requests.
This rule detects potential email spoofing attempts where an email claims to originate from a specific domain ('gasparinutrition.com') or is intended for external recipients, but fails critical authentication checks. Specifically, it identifies emails with DMARC failure, SPF failure, and a suspicious DKIM signing domain associated with 'gappssmtp.com', indicating an attempt to bypass sender authentication mechanisms.
Detects the use of Node.js package managers (npm, node, npx) to execute 'install' commands in conjunction with the creation of specific Model Context Protocol (MCP) configuration files (.vscode/mcp.json, .amazonq/mcp.json, or .cursor/mcp.json). This pattern may indicate the installation of potentially untrusted or malicious development extensions or AI-assistant integrations within common development environments.
This rule monitors network traffic for suspicious patterns indicating exploitation of LocalStack environments. It detects three primary malicious activities: Velocity Template Language (VTL) injection targeting reflection methods (e.g., ProcessBuilder) for RCE; unauthorized manipulation of API Gateway resources (e.g., creating or modifying deployments) accompanied by IAM scope bypass techniques; and direct execution of RCE-style API triggers against known LocalStack port 4566.
Detects Node.js executing the malicious setup.cjs script with the --no-warnings flag. This execution sequence is associated with the easy-day-js typosquat postinstall hook used in the Mastra npm supply chain compromise.
Slack Anomalous Activity Detected
Cortex XDR
This rule detects anomalous activity reported by Slack's internal anomaly detection system. This includes events such as impossible travel, new device access, suspicious IP changes, and other behavioral anomalies that could indicate a compromised account or unauthorized access to a Slack workspace.
Slack Anomalous Activity Detected
Cortex XDR
This rule detects anomalous activity reported by Slack's internal anomaly detection system. This includes events such as impossible travel, new device access, suspicious IP changes, and other behavioral anomalies that could indicate a compromised account or unauthorized access to a Slack workspace.
Detects phishing lures delivered through social media messaging services
Detects Log4Shell JNDI injection attempts
Detects network traffic associated with the EvilTokens phishing kit's 'killed' gate check mechanism. The kit GETs /api/device/gate/<PAGE_ID> with the ngrok-skip-browser-warning header. When the backend returns a killed flag, the phishing page wipes the DOM and renders a fake 'Page Not Found - Microsoft' error to evade analysis or block specific victims.
Detects PowerShell execution patterns used for host reconnaissance and application enumeration, specifically looking for combinations of Get-StartApps and Get-AppxPackage with silent error handling. This behavior was observed in the easy-day-js malware dropped via the Mastra npm supply chain compromise.
Detects exploit kit landing pages serving browser exploits
Detects users clicking links from emails containing Canadian payroll lures leading to fake Workday/ADP domains. The rule specifically looks for navigation to URLs matching a regex pattern for Workday, ADP, or payroll-related terms combined with login/auth/secure keywords, and correlates this with browser process events (Chrome or Edge).
Detects broad assignments of administrative roles or specific deletion permissions for cloud storage buckets in GCP, AWS, and Azure. This includes granting 'storage.admin', 'storage.objectAdmin', or 'storage.buckets.delete' in GCP, 's3:DeleteBucket' in AWS IAM policies, or 'Storage Account Contributor'/'Owner' roles in Azure. Such assignments to service accounts or non-administrative identities could enable 'Universal Bucket Hijacking' or unauthorized data deletion.
Detects an account granting offline access, mail, files, directory, or user impersonation permissions shortly after anomalous authentication. This rule is designed to identify potential persistence mechanisms established by adversaries leveraging OAuth applications, as seen in campaigns like Tycoon 2FA AITM.
Detects network connections from Node.js or Bun runtime processes to common cloud instance metadata service IPs (AWS, Azure, GCP) or to the default HashiCorp Vault port (8200). This activity can indicate credential access attempts, especially in the context of a supply chain attack where malicious code might be injected into a Node.js/Bun application to exfiltrate sensitive information or gain further access. The rule correlates network connection events with process execution events to identify the specific runtime responsible.
Detects the creation of hidden tracking files (.pkg_history and .pkg_logs) in the system's temporary directory. These markers are dropped by the setup.cjs dropper as part of the easy-day-js typosquat in the Mastra npm supply chain compromise.
Detects when a user grants consent to a third-party application via the OAuth consent framework, specifically looking for grants that include highly privileged permissions such as Mail.ReadWrite, Contacts.Read, or offline_access. This can indicate a compromised user account being used to establish persistence or gain further access through a malicious application.
This rule detects unauthorized configuration of GRE tunnels on Cisco IOS-XE network devices, potentially indicating persistent command and control (C2) channel establishment via TCL injection or illicit configuration changes involving known attacker infrastructure (62.171.185.97). It correlates network traffic to the attacker IP with process-level activity involving suspicious configuration files, scripts, or device-specific command-line arguments.
Detects attempts to modify or delete Microsoft Graph API conditional access policies. This could indicate an adversary attempting to weaken security controls to facilitate unauthorized access or persistence.
Detects the obfuscated 'setup.cjs' dropper associated with the easy-day-js npm supply chain attack. The rule identifies unique obfuscated variable names, XOR-encoded marker bytes, and specific campaign-related strings, including postinstall commands, package names, second-stage payload filenames, self-deletion patterns, and TLS bypass indicators.
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