Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects suspicious large file transfers over the network, specifically looking for connections where more than 100MB (104857600 bytes) of data has been sent or received. It then aggregates these transfers by device and remote IP within one-hour bins and flags if five or more such large transfers occur within that hour. This behavior can be indicative of data exfiltration, often associated with ransomware attacks or other malicious data theft activities.
This rule detects when an account copies five or more files, each larger than 50MB, within a one-hour period. This activity could indicate data exfiltration or staging for exfiltration.
This rule identifies accounts that create or modify 10 or more files, each larger than 200MB, within a one-hour period. This behavior can be indicative of data exfiltration, staging of large files, or other suspicious bulk file operations.
This rule detects suspicious file export activity by monitoring for the creation of files with names containing keywords like 'export', 'dump', or 'extract'. It triggers an alert if five or more such files are created by the same account within a one-hour window, indicating potential data exfiltration or staging.
This rule detects HTTP POST requests to pastebin.com's API for pasting content, specifically targeting the '/api/api_paste.php' endpoint. It triggers if the size of the data being uploaded is greater than 1000 bytes, indicating a potential data exfiltration attempt to a public text storage site.
This rule detects potential data exfiltration to Dropbox cloud storage. It specifically looks for HTTP POST requests to 'api.dropboxapi.com' with a data size greater than 10000 bytes. This indicates a significant amount of data being uploaded to Dropbox, which could be a sign of unauthorized data transfer.
This rule detects potential sensitive data exfiltration to a web service. It triggers when an HTTP POST request is made from the home network to any destination, and the request body size is greater than 10,000 bytes. A threshold is applied, alerting if 10 such events occur from the same source IP within 60 seconds. This pattern suggests a large amount of data being uploaded, which could indicate exfiltration.
This rule detects bulk file copies to USB drives via SMB by looking for the string "USBSTOR" (case-insensitive) within SMB traffic on port 445. A threshold of 100 occurrences within 60 seconds from the same source IP triggers the alert, indicating a potential exfiltration attempt.
This rule detects HTTP POST requests from the home network to any external server where the request body size is greater than 10000 bytes. It uses a threshold to alert if 5 such events occur from the same source IP within an hour, indicating a potential cron-timed data upload or exfiltration attempt.
Detects network connections to Hugging Face domains initiated by Node.js. This behavior is associated with a North Korean-linked npm infostealer campaign that abuses the legitimate AI/ML platform to host its second-stage payload and receive exfiltrated stolen data archives, bypassing standard reputation-based network filtering.
Detects outbound network activity to the known malicious domain sfrclak.com or IP address 142.11.206.73. This behavior may indicate malware beaconing, command-and-control communication, or interaction with attacker-controlled infrastructure.
Detects network connections over common exfiltration ports (80, 443, 53) to external IP addresses originating from executables running out of uncommon, temporary, or public directories. This behavior frequently indicates custom or unrecognized malware binaries conducting data exfiltration or establishing Command and Control (C2) communication.
This rule detects large data uploads over HTTPS (port 443) from the home network to any external destination. Specifically, it triggers if the data size in a single TCP flow to the server exceeds 65,000 bytes. To prevent excessive alerts, it uses a threshold of 20 such events within 60 seconds, tracked by the source IP address. This behavior is indicative of potential data exfiltration.
This rule detects sustained outbound network traffic with a data size greater than 1000 bytes, originating from the home network. It triggers an alert if 200 such connections are observed from the same source IP address within a 300-second window. This behavior is indicative of automated exfiltration, where an attacker continuously sends data out of the network.
This rule detects suspicious large file transfers over the network, specifically looking for connections where more than 100MB (104857600 bytes) of data has been sent or received. It then aggregates these transfers by device and remote IP within one-hour bins and flags if five or more such large transfers occur within that hour. This behavior can be indicative of data exfiltration, often associated with ransomware attacks or other malicious data theft activities.
This rule detects large HTTP PUT requests (over 50KB) directed towards common cloud storage services (Amazon S3, Azure Blob Storage, Google Cloud Storage). This activity could indicate data exfiltration to an external cloud account.
This rule detects HTTP PUT requests to s3.amazonaws.com that include the 'x-amz-copy-source' header and have a data size greater than 1000 bytes. This combination of indicators suggests an attempt to copy data from one S3 bucket to another, potentially indicating data exfiltration to an attacker-controlled AWS account.
This rule detects potential VXLAN traffic duplication for exfiltration purposes. It specifically looks for TCP traffic on port 4789 (the default VXLAN port) directed towards the home network. A threshold of 10 connections from the same source within 30 seconds triggers the alert, indicating a high volume of VXLAN traffic that could be indicative of data exfiltration.
This rule detects attempts to exfiltrate sensitive data by posting it to common text sharing services. It specifically looks for HTTP POST requests with a body size greater than 1000 bytes directed towards domains associated with services like paste.ee, hastebin, ghostbin, and privatebin.
Detects network connections over common exfiltration ports (80, 443, 53) to external IP addresses originating from executables running out of uncommon, temporary, or public directories. This behavior frequently indicates custom or unrecognized malware binaries conducting data exfiltration or establishing Command and Control (C2) communication.
Detects network connections over common exfiltration ports (80, 443, 53) to external IP addresses originating from executables running out of uncommon, temporary, or public directories. This behavior frequently indicates custom or unrecognized malware binaries conducting data exfiltration or establishing Command and Control (C2) communication.
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