Ankit Mehta
@SecvynIndiaTrusted contributorCompletionist
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8,655 detections
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This rule detects potential Trickbot malware command and control (C2) communication by identifying network connections to specific remote URLs and ports commonly associated with Trickbot activity. It looks for multiple connections within an hour from the same device to these indicators.
Detects network connections to known or suspected Command and Control (C2) IP addresses and ports associated with ransomware activity. This rule specifically looks for outbound connections from devices to a predefined list of suspicious remote IP addresses on common C2 ports (443, 8443, 6379, 27017).
This rule detects the creation or modification of files on a device that match a list of known malicious SHA256 hashes. It identifies potential malware presence based on file integrity.
This rule detects modifications to specific registry keys that are commonly used for persistence by malware. The rule looks for Event ID 4657 (A registry value was modified) and checks if the ObjectName corresponds to known malicious registry paths related to Run keys, RunOnce, or service configurations. This indicates an attempt to establish persistence or alter system behavior for malicious purposes.
This rule detects multiple unauthorized access attempts (5 or more within an hour) to sensitive Active Directory objects such as 'Admin', 'krbtgt', or 'Domain Admins'. It leverages Windows Security Event ID 4662, which indicates an operation was performed on an object, and filters for specific sensitive object names. The rule then groups these attempts by object, IP address, and user, alerting when a threshold of attempts is met.
This rule detects network connections to common messaging and data store ports (RabbitMQ, Redis, MinIO) initiated by PowerShell, redis-cli, or minio.exe, where the process command line also contains the string "encrypt". This combination suggests potential malicious activity such as data encryption by ransomware or other malware targeting these services.
This rule detects potential process injection attempts by monitoring Security Event ID 4688 (A new process has been created) for command-line arguments containing 'CreateRemoteThread' or 'VirtualAllocEx'. These API calls are commonly used in various process injection techniques to allocate memory and create threads in a remote process, allowing an attacker to execute arbitrary code within another process's context.
This rule detects an unusually high volume of file sharing events from a single user in OneDrive within a one-hour window. Specifically, it looks for five or more 'SharingSet' or 'AnonymousLinkCreated' operations by the same UserId within an hour, which could indicate data exfiltration or unauthorized sharing.
This rule detects an unusually high volume of SharePoint sharing invitation creations or sharing setting modifications by a single user within an hour. This could indicate an attacker attempting to exfiltrate data or broadly share sensitive information.
This rule detects instances where 'wscript.exe' or 'cscript.exe' (VBScript interpreters) initiate processes that attempt to download files from the internet (HTTP, HTTPS, FTP) or from network shares, or execute common system utilities often used for file transfer or execution like 'net.exe', 'certutil.exe', or 'bitsadmin.exe'. This pattern is indicative of multi-stage VBScript loaders often used in phishing campaigns to retrieve and execute further malicious payloads.
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