Ankit Mehta
@SecvynIndiaTrusted contributorCompletionist
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8,655 detections
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This rule detects potential open redirect attempts by monitoring W3C IIS logs for URI queries containing keywords like 'callback', 'redirect', or 'url='. It then aggregates these attempts by client IP address and time, triggering an alert if five or more such attempts are observed within an hour from a single IP. This pattern can indicate an attacker attempting to exploit an open redirect vulnerability to phish users or bypass security controls.
This rule detects an unusually high number of web search queries (identified by 'search' or 'query' in the URI) originating from a single IP address within a one-hour window. A threshold of 100 or more queries triggers the alert. This behavior could indicate automated activity such as web scraping, reconnaissance, or a denial-of-service attempt against the search functionality.
This rule detects an unusually high number of executable (.exe or .msi) file creations within common installation or binary folders (containing 'setup', 'install', or 'bin' in their path) by a single process within a one-hour window. This behavior could indicate the staging or unpacking of malicious software, or a legitimate but potentially suspicious installation activity.
This rule detects repeated command-line executions that contain keywords 'signing' or 'certificate' within a one-hour window on the same computer and by the same account. This behavior could indicate an adversary attempting to manipulate code signing, bypass certificate validation, or otherwise interfere with security mechanisms. The threshold of 3 or more occurrences within an hour aims to reduce false positives from legitimate, infrequent activities.
This rule detects processes making a high volume of network connections (10 or more within an hour) to URLs containing 'release' or 'download'. This behavior can be indicative of malware downloading additional components, updates, or exfiltrating data, but could also be legitimate software updates or large file transfers.
This rule detects repeated execution of commands containing both 'version' and 'control' keywords within the command line. It specifically looks for at least 5 such executions within a one-hour window on the same computer by the same account. This pattern could indicate an adversary attempting to enumerate system or software versions, or interact with version control systems, potentially as part of reconnaissance or privilege escalation.
This rule detects the creation of 'requirements.txt' or 'pom.xml' files on a system. These files are commonly used in software development projects (Python and Java/Maven, respectively) to manage dependencies and project configurations. Monitoring their creation can help identify legitimate development activities, but also potential malicious actions such as supply chain compromise where an adversary might introduce or modify project dependencies.
This rule detects when a single computer account performs five or more 'docker pull' or 'docker build' commands within an hour. This could indicate an adversary staging tools or building malicious images on a compromised host.
This rule detects a high volume (10 or more within an hour) of process creations where the command line contains 'compiler' or 'build'. This could indicate development activity, but also potentially malicious compilation or staging of tools by an attacker.
This rule detects when a user adds mailbox permissions to three or more mailboxes within a one-hour window in Exchange Online. This behavior can indicate an adversary attempting to gain persistent access to multiple mailboxes, often for data exfiltration or further compromise.
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