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694 detections
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This rule detects any activity within Office 365 logs that includes a 'username' field and then projects a SHA256 hash of a 'file.exe'. While the specific detection logic is incomplete, it indicates an attempt to correlate Office 365 user activity with file execution or manipulation, potentially for forensic analysis or to identify suspicious file interactions.
This rule identifies if a given IP address falls within the known IP ranges used by Apple's iCloud Private Relay service. It leverages an external CSV file containing these IP ranges for both IPv4 and IPv6. This can be used to detect or monitor traffic potentially obfuscated by iCloud Private Relay.
Detects ClickFix PowerShell payloads
Detects potential command injection attacks against AI agents through
suspicious prompt patterns or system command execution by AI processes.
suspicious prompt patterns or system command execution by AI processes.
Detects procdump execution targeting lsass.exe A variation of https://github.com/SigmaHQ/sigma/blob/6fe7343bf79306884b05837d5e03bcbcb141ce50/rules/windows/builtin/security/win_security_susp_lsass_dump.yml#L19
Tycoon2FA PHaaS User Agent Detection
Cortex XDR
Detects user agents associated with Tycoon2FA phishing-as-a-service (PHaaS) campaigns, specifically targeting credential relay (axios/1.13.x) and device code phishing (node/undici) variants. The rule identifies sign-in attempts from unmanaged and non-compliant devices using these specific user agents during a device code flow authentication.
Detects the creation of executable files (exe, dll, bat, ps1, vbs, msi, lnk) by common web browsers (Chrome, Firefox, Edge, Internet Explorer) or email clients (Outlook). This activity can indicate a user downloading or receiving a potentially malicious file, which could lead to initial access or further compromise.
This query detects network communication to known Command and Control (C2) IP addresses used by the Medusa ransomware group, often via malicious SimpleHelp RMM servers.
Detects a sequence of reconnaissance commands (whoami, tasklist, systeminfo, netstat) executed by the command prompt and piped to a text file. This specific TTP was used in the Notepad++ supply chain attack to gather system information for exfiltration. The detection is scoped to specific AppData directories to reduce false positives.
This rule detects logon events from Windows Admin Center (WAC) virtual accounts where the associated user principal name (UPN) belongs to an external or unknown tenant. This activity is a key indicator of compromise for CVE-2026-20965, where an attacker uses a forged token from an external tenant to gain unauthorized access.
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