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System Binary Proxy Execution via ld.so

This rule detects the execution of a binary through the ld.so dynamic linker. Attackers may use this technique to execute binaries while attempting to evade detection.

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Detection Logic

process where event.type == "start" and event.action == "exec" and process.parent.executable like (
  "/lib/ld-linux*.so*", "/lib64/ld-linux*.so*", "/usr/lib/ld-linux*.so*", "/usr/lib64/ld-linux*.so*"
) and not (
  process.executable in ("/usr/bin/uptime", "/usr/bin/xkbcomp") or
  process.parent.command_line like ("*/home/*/JetBrains/*", "*/snap/intellij-idea-ultimate*") or
  process.command_line like "sh -c*/usr/bin/xkbcomp*" or
  process.working_directory like ("/users/*/.cache/JetBrains/*", "/var/tmp/mkinitramfs*", "/home/adoagent") or
  process.command_line == "/usr/bin/python3.9 -V" or
  process.args like "/users/*/.cache/JetBrains/*"
)

Field Validations

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