Malicious ld.so.preload Persistence Modification on Ivanti Connect Secure (via file_event)

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1574.006Dynamic Linker Hijacking
Persistence
- T1574.006Dynamic Linker Hijacking
Priv Esc
- T1574.006Dynamic Linker Hijacking
Defense Evasion
- T1574.006Dynamic Linker Hijacking
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects modification of /etc/ld.so.preload, the dynamic linker preload persistence mechanism abused during CVE-2025-22457 exploitation to auto-load the SPAWN family of implants into every process. Changes to ld.so.preload on an appliance grant stealthy systemwide code execution.

Reporting behind it

Related detections9 linkedT1574.006 — drag to rearrange

Suspicious Dynamic Linker Hijacking via ld.so.preload Modification

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Malicious perfctl Rootkit Library Drop via ld.so.preload (via file_event)

Malicious Shared Library Preload Persistence via ld.so.preload (via process_creation)

Malicious Userland Rootkit Persistence via ld.so.preload on Linux

Suspicious Bootkitty Rootkit Component Drop under opt via File System

Malicious LD_PRELOAD Rootkit Persistence via ld.so.preload

Linux Code Injection via ld.so Preload File (/etc/ld.so.preload)

Malicious ld.so.preload Persistence Modification on Ivanti Connect Secure (via file_event)

Pivot detection · T1574.006 · 9 related

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

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