splApache-2.0from splunk/security_content

Linux Auditd Hidden Files And Directories Creation

The following analytic detects suspicious creation of hidden files and directories, which may indicate an attacker's attempt to conceal malicious activities or unauthorized data. Hidden files and directories are often used to evade detection by security tools and administrators, providing a stealthy means for storing malware, logs, or sensitive information. By monitoring for unusual or unauthorized creation of hidden files and directories, this analytic helps identify potential attempts to hide or unauthorized creation of hidden files and directories, this analytic helps identify potential attempts to hide malicious operations, enabling security teams to uncover and address hidden threats effectively.

Quality

FP risk

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Rule sourcedetections/endpoint/linux_auditd_hidden_files_and_directories_creation.yml

`linux_auditd` execve_command IN ("*touch *", "*mkdir *", "*vim *", "*vi *", "*nano *") AND execve_command IN ("* ./.*", "* .*", "*/.*")
  | rename host as dest
  | rename comm as process_name
  | rename exe as process
  | stats count min(_time) as firstTime max(_time) as lastTime
    BY argc execve_command dest
  | `security_content_ctime(firstTime)`
  | `security_content_ctime(lastTime)`
  | `linux_auditd_hidden_files_and_directories_creation_filter`