Suspicious Bootkitty Rootkit Component Drop under opt via File System

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1574.006Dynamic Linker Hijacking
Persistence
- T1542.003Bootkit
- T1574.006Dynamic Linker Hijacking
Priv Esc
- T1574.006Dynamic Linker Hijacking
Defense Evasion
- T1542.003Bootkit
- T1574.006Dynamic Linker Hijacking
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of the Bootkitty user-space and kernel components /opt/injector.so, /opt/observer, and /opt/rootkit_loader.ko. These fixed paths are dropped by the first known UEFI bootkit for Linux to load a kernel module and inject a shared object through the boot process. Their presence indicates a UEFI bootkit compromise.

Reporting behind it

Related detections9 linkedT1574.006 — drag to rearrange

Malicious Koske Userland Rootkit Installation via ld.so.preload (via file_event)

Malicious TeamTNT prochider Rootkit Deployment as Shared Object (via file_event)

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

Malicious LD_PRELOAD Rootkit Persistence via ld.so.preload

Malicious Boot Configuration Tampering via bcdedit (via process_creation)

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

Linux: Detect Modification of /etc/ld.so.preload for Shared Object Injection

Suspicious Bootkitty Rootkit Component Drop under opt via File System

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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