Suspicious LD_PRELOAD Library Injection via PUMAKIT Userland Rootkit

PremiumReviewedSigma · Medium · v1
Product
linux
Category
process_creation
Author
HuntRule
Published
2026-07-10
Updated
2026-08-28

ATT&CK techniques

Execution → Defense Evasion
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Cred Access

  5. Discovery

  6. Lateral Movement

  7. Collection

  8. C2

  9. Exfiltration

  10. Impact

What it detects

This rule detects a process launched with the LD_PRELOAD environment variable pointing at a shared object under a system library path which the PUMAKIT userland rootkit uses to hook standard library calls and hide its presence. Adversaries preload a malicious shared object to intercept functions for stealth and persistence.

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Malicious VoidLink Kernel Module Load via Insmod (via process_creation)
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Suspicious LD_PRELOAD Library Injection via PUMAKIT Userland Rootkit
Pivot detection · T1014 · 9 related

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