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Clipboard Collection of Image Data with Xclip Tool

Sigma Rules

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Summary
This detection rule focuses on identifying potential malicious activity where an attacker may attempt to capture image data stored in a user's clipboard using the 'xclip' tool on Linux systems. The rule specifically looks for the execution of 'xclip' with certain parameters that indicate it is being used to access clipboard contents containing image data. The parameters include checks for the 'EXECVE' syscall and flags such as '-selection' or '-sel', which are pertinent to clipboard operations. Additionally, the rule looks for output types beginning with 'image/', signifying the intent to access image files. This rule is particularly relevant for environments where clipboard utilities are frequently used, recommending deployment on servers where sensitive dataHandling is critical. The rule is designed to help security teams recognize potential data exfiltration operations that misuse the 'xclip' tool.
Categories
  • Linux
  • Endpoint
Data Sources
  • Process
  • Command
Created: 2021-10-01