Ankit Mehta
@SecvynIndiaTrusted contributorCompletionist
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8,655 detections
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This rule detects and summarizes changes to domain groups (creation, deletion, or modification) by a specific user. It counts the number of such changes per user per hour, which can be indicative of administrative activity or potential malicious account manipulation.
This rule detects an unusually high number of firewall rule changes (Event ID 4948) occurring on a single computer within a one-hour window. A sudden surge in firewall modifications can indicate malicious activity, such as an attacker attempting to establish persistence, bypass security controls, or facilitate lateral movement by opening new ports or disabling existing rules.
This rule detects when the Windows Security Event Log (Event ID 1102) has been cleared on a system. Clearing event logs is a common technique used by adversaries to remove traces of their activity and evade detection.
This rule detects a high frequency (3 or more within an hour) of command-line executions containing keywords like 'antivirus', 'defense', or 'endpoint' on a Windows system. This activity could indicate an adversary attempting to interact with, disable, or tamper with security software to evade detection.
Detects a high volume (10 or more within an hour) of file creations or modifications within the 'Program Files' directory where the filename contains the string 'update'. This could indicate legitimate software updates, but also potentially malicious activity attempting to masquerade as an update process, or an application writing to protected directories.
This rule detects an unusual frequency of inventory-related commands being executed on a device within a one-hour window. Specifically, it looks for `tasklist.exe`, `wmic.exe`, or `Get-HotFix` being run 5 or more times in an hour. This behavior can indicate an adversary performing system information discovery.
This rule detects when five or more driver-related files (.inf, .sys, or .drv) are created or modified within a one-hour window by the same initiating process account. This behavior can be indicative of malicious driver installation, rootkit activity, or other forms of persistence or privilege escalation.
Detects the creation of files containing keywords such as 'vulnerability', 'assessment', or 'scan'. This rule aims to identify activities related to vulnerability scanning or security assessments being performed on a system, potentially indicating reconnaissance or unauthorized activity. The events are summarized by the initiating process account name and time to help identify the source of these activities.
Detects the execution of common security scanning executables such as Microsoft Malicious Software Removal Tool (MSRT) and generic 'scan.exe'. This rule counts the occurrences of these executions per device per hour, which can indicate legitimate security operations or potential adversary activity if used for discovery or defense evasion.
This rule detects a high frequency (3 or more within an hour) of command-line executions containing keywords like 'antivirus', 'defense', or 'endpoint' on a Windows system. This activity could indicate an adversary attempting to interact with, disable, or tamper with security software to evade detection.
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