Suspicious ASLR Disabled Through Sysctl or Direct Syscall - Linux (via auditd)

This rule detects actions that disable Address Space Layout Randomization (ASLR) in Linux, including: - Use of the `personality` syscall with the ADDR_NO_RANDOMIZE flag (0x0040000) - Modification of the /proc/sys/kernel/randomize_va_space file - Execution of the `sysctl` command to set `kernel.randomize_va_space=0` Disabling ASLR is frequently used by adversaries during exploit development or to bypass memory protection mechanisms. A successful use of these methods can reduce the effectiveness of ASLR and make memory corruption attacks more reliable.

SigmahighLinuxv1
Full detection rule

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Known false positives

  • Unknown

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.