Darshan Thummar
@MightyCompletionist
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2,107 detections
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This rule detects potential data exfiltration to a GitLab repository. It specifically looks for HTTP POST requests to gitlab.com with the URI containing '/git-receive-pack' and a data size greater than 10KB. This pattern is indicative of a 'git push' operation, which could be used to exfiltrate data.
This rule detects potential data exfiltration attempts via a GitHub repository push. It specifically looks for HTTP POST requests to 'github.com' with the URI '/git-receive-pack' and a data size greater than 10000 bytes. This pattern is indicative of a 'git push' operation, which could be used to upload sensitive data to a public or controlled GitHub repository.
This rule detects potential data exfiltration of USB drive contents over SSH using SCP. It triggers when TCP traffic on port 22 (SSH) from the home network to the home network contains the string "/dev/sd" (case-insensitive) and the data size is greater than 65000 bytes. This combination suggests that a file from a Linux-like USB device (often mounted as /dev/sdX) is being transferred out via SCP.
This rule detects scheduled data transfers occurring at off-hours, characterized by a large data size (greater than 65000 bytes) in TCP traffic flowing from the home network to any destination. It uses a thresholding mechanism to alert if 100 such transfers are observed within a 300-second window from the same source.
This rule detects network traffic duplication, specifically looking for the GRE (Generic Routing Encapsulation) protocol (IP protocol 47) being used in a way that suggests traffic mirroring via SPAN or TAP devices. The rule triggers if 10 or more GRE packets are observed from a single source IP within a 30-second window, flowing from a client to a server.
This rule detects a potential SMS Pumping Attack, specifically targeting bulk One-Time Password (OTP) requests. It triggers when a single source IP address makes more than 50 HTTP POST requests to a URI containing "send_sms" within a 60-second window. This behavior is indicative of an attacker attempting to exploit SMS delivery systems by repeatedly requesting OTPs, potentially leading to financial costs for the service provider or overwhelming users with messages.
This rule detects cryptomining activity by identifying the Stratum protocol's 'mining.subscribe' message over TCP port 3333. The Stratum protocol is commonly used by cryptocurrency miners to communicate with mining pools. Detection of this specific message indicates an attempt to initiate or participate in cryptomining operations, potentially on a compromised system.
This rule detects attempts to modify web server files, specifically 'index.html' within a 'wwwroot' directory, over the Server Message Block (SMB) protocol. The detection is based on the presence of these strings in network traffic directed to port 445 (SMB) on the internal network. This activity could indicate an attacker attempting to deface a web server or inject malicious code.
This rule detects a high volume of TCP traffic on port 445 (SMB) directed to the home network, specifically looking for the SMB protocol signature. The threshold of 500 connections within 30 seconds from a single source IP suggests an attempt at mass file deletion or disk wiping activity on network shares, often associated with ransomware or destructive malware.
This rule detects multiple HTTP requests to 'iam.amazonaws.com' with the URI containing 'DeleteAccessKey'. This activity, especially when occurring frequently (5 times in 30 seconds from the same source), could indicate an attempt to revoke cloud account access keys, potentially as part of a lockout impact attack.
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