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Hackers breach F5 BIG-IP APM devices to deploy Linux rootkit

Hackers breach F5 BIG-IP APM devices to deploy Linux rootkit

By · Published September 11, 2026  07:09 UTC · Updated September 11, 2026  11:45 UTC

7sources
7articles
5velocity
+0%since first seen
48d agofirst detected
Text:
🤖 AI Dossier

Evidence dossier

Intelligence passport

70/100 Excellent
7distinct sources shown
40velocity measurements
1language editions checked
Unsupported statements were removed before publicationbrief evidence status

Measured timeline

📍 The outcome

The coverage described a fileless Linux rootkit called PoisonedRefresh that injected memory‑only PHP web shells into F5 BIG‑IP APM servers, allowing attackers to backdoor the devices while evading disk scans. Analysts from Sophos and other outlets examined the malware’s technique of hiding inside Apache memory and maintaining clean F5 BIG‑IP files.

Epilogue added 46d ago, after coverage quieted.

Momentum

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The story so far

⚡ Executive Intelligence Takeaways Corroborated across 7 independent newsrooms
  • Velocity & Diffusion: Coverage exploded across 7 distinct news outlets with 7 published articles, achieving a live velocity of 5.
  • Primary Driver: Hackers breach F5 BIG-IP APM devices to deploy Linux rootkit
  • Predictive Outlook: Archynetys algorithmic models forecast this story will fade from trending status over the next 24 hours.
  • Source Integrity: Verified strictly against primary headline reporting under zero-hallucination protocols.

PoisonedRefresh, a fileless Linux rootkit, has been discovered to inject PHP web shells into F5 BIG-IP APM server memory. According to BleepingComputer, hackers breached F5 BIG-IP APM devices to deploy the Linux rootkit. Sophos' analysis of the rootkit revealed that it hides in Apache memory while F5 BIG-IP files remain clean.

This evasion technique allows the rootkit to avoid detection by disk scans. The rootkit's functionality was detailed by gbhackers.com, which explained that it backdoors F5 BIG-IP servers with memory-only PHP web shells. Thehackernews.com and CyberSecurityNews also reported on the rootkit's ability to inject PHP web shells into F5 BIG-IP servers.

Kobaran.com provided additional insight into the rootkit's behavior, noting that it hides in Apache memory while F5 BIG-IP files remain clean. No contradictions were reported among the outlets. The current state of the situation is that hackers have successfully breached F5 BIG-IP APM devices to deploy the Linux rootkit, and its evasion techniques have been detailed by various outlets.

Synthesized by Archynetys from the headlines below under a strict no-invention contract. ✓ fact-checked: unsupported claims removed (90% supported) Updated 46d ago.

Who reported it (7)

The obvious questions

What is PoisonedRefresh?

A fileless Linux rootkit that injects PHP web shells into F5 BIG-IP APM server memory

What is the rootkit's evasion technique?

It hides in Apache memory while F5 BIG-IP files remain clean

What is the rootkit's functionality?

It backdoors F5 BIG-IP servers with memory-only PHP web shells

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Topics

F5 BIG-IP APM Linux rootkit PoisonedRefresh PHP web shells memory-only rootkit

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