Shadows VMB
@Vemorian_MortTrusted contributorCompletionist
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121 detections
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This rule aggregates sign-in log activity for a specific user to identify the volume and distribution of authentication attempts across different IP addresses, applications, and client types within a specified time range. It is primarily used for identifying anomalies in access patterns that might indicate credential abuse or unauthorized access.
Detects a high volume of file rename events initiated by a single process on a device within a short time window (5 minutes). This behavior is often indicative of ransomware activity, where files are renamed as part of the encryption or extortion process.
Detects instances where Microsoft Teams logs report a message containing a 'Malicious url'. This suggests a potential phishing attempt via Teams, where a user is being sent a link classified as malicious by security systems.
This rule monitors Microsoft Teams communication logs to identify messages containing URLs. By parsing the message content and extracting domains, this rule facilitates the detection of potentially malicious links, phishing attempts, or unauthorized data sharing within the organization's Teams environment.
This rule detects a significant spike in usage for Azure Cognitive Services, specifically for operations like Chat Completions or Image Generation. By comparing the request count per caller to their historical average (hourly), the rule identifies potential abuse, service disruption, or unauthorized resource usage.
This rule detects attempts to bypass macOS Gatekeeper security controls by disabling security policies via the 'spctl' command, or by removing file quarantine attributes using the 'xattr' utility. These techniques are commonly used to execute unauthorized or malicious software that would otherwise be blocked by macOS security features.
This rule detects when an individual user on a single host launches three or more distinct AI or LLM-related tools (such as ChatGPT, Claude, Cursor, Copilot, Ollama, or LMStudio) within the observed timeframe. This may indicate developers or power users utilizing various AI-assisted coding and productivity tools, but could also indicate unauthorized use of generative AI tools for data processing or exfiltration.
This rule detects installation, file activity, or registry configuration changes associated with the 'bright-save-feed@tabtools.org' browser extension identifier. Such identifiers are commonly associated with malicious browser add-ons or potentially unwanted programs (PUPs) that may be used for browser session hijacking, unauthorized content injection, or persistent access.
This rule monitors outbound email traffic per sender and flags accounts exceeding a specified hourly threshold. A sudden spike in outbound emails from a single user account may indicate a compromised mailbox being used for spam, phishing, or mass data exfiltration.
Detects modifications, registrations, or deletions of security information for a user account, or general management updates within the user directory, which may indicate account tampering or unauthorized privilege persistence.
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