Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects suspicious command-line entries within the Windows RunMRU registry key, which logs recently executed commands from the Run dialog (Win+R). This detection targets common ClickFix or copy-paste attack patterns, specifically identifying the presence of 'powershell', 'curl', or long base64-encoded strings.
Detects files containing specific structural footers (537 bytes) and RSA key generation strings commonly associated with ransomware encryption. The footer indicates the use of RSA-4096 to encrypt files, with modes for full, striped, or header-only encryption patterns.
Detects suspicious processes attempting to open security-critical DLLs like amsi.dll or ntdll.dll with potential write or execute access. This behavior is often associated with runtime patching techniques used to disable or evade AMSI (Antimalware Scan Interface) and ETW (Event Tracing for Windows) monitoring, which are common defensive evasion tactics.
This rule monitors cloud audit logs for high-frequency file access operations originating from a Python-based HTTP client (python-httpx). This behavior is characteristic of automated collection or exfiltration scripts utilizing cloud APIs to download or access large quantities of files.
Detects high-volume access to Microsoft Graph API endpoints related to messages, mail folders, and attachments by a single user account within a 30-minute window. This behavior is indicative of automated, unauthorized email and attachment scraping, often associated with remote email collection attempts.
Detects user account logins following a recent MFA registration (within 1 to 30 days) combined with subsequent network activity that utilizes node.js applications to query the Microsoft Graph API, which may indicate account takeover or malicious persistence setup.
Detects network activity associated with the SilverFox relay dispatcher, including specific cache-busting URI patterns, C2 infrastructure hosted on Cloudflare Workers, and the delivery of decoy WeChat installer links.
This rule monitors email or communication logs for phishing lures themed around 'passkey' or 'sso' (Single Sign-On). It looks for indicators of urgency, helpdesk impersonation, or targeting of personal devices, which are often precursors to Adversary-in-the-Middle (AiTM) or device-code phishing attacks.
This rule monitors for OAuth device-code authentication flow completions initiated from devices flagged as non-compliant or unmanaged in Azure AD. This behavior is indicative of potential token theft via vishing or SMS-based phishing lures (consistent with Storm-3121/Storm-3032 TTPs), where an adversary tricks a user into completing a device authorization grant to facilitate MFA bypass and persistence.
Detects when a user account updates their multi-factor authentication (MFA) details to include a higher count of registered devices than previously recorded. This behavior could indicate an attacker adding their own device to a compromised account to bypass MFA or maintain persistent access.
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