The 'Quiet' Week: eBPF Persistence & LLM Supply Chain Risks
Just reviewed the weekly recap. The "quiet" weeks are usually when the long-term persistence mechanisms shine—or rather, remain hidden. Two things stood out regarding the Telecom and LLM sectors that we shouldn't ignore.
First, the Telecom Sleeper Cells. We're seeing BPFDoor and similar eBPF rootkits (linked to groups like Red Menshen) buried deep in infrastructure. These bypass standard userland monitoring entirely. If you aren't scraping kernel tracepoints, you're flying blind.
Here is a quick sanity check for suspicious loaded BPF programs on a Linux node:
sudo bpftool prog show
sudo bpftool net show | grep -i "name\|id"
Second, the LLM/Supply Chain noise. It's not just jailbreaking prompts anymore; it's poisoned packages. The recent litellm backdoor activity highlights how targeted these actors are against AI dev environments.
Simple hash verification before deployment is becoming non-negotiable:
import hashlib
def verify_package(file_path, expected_hash):
return hashlib.sha256(open(file_path, 'rb').read()).hexdigest() == expected_hash
On the Apple side, the U.K. age checks are a compliance headache, but I'm more worried about the kernel exploits still lingering in the wild.
**How is everyone handling eBPF visibility in their SOC without deploying heavy agents on every edge router?**
We've started hunting for eBPF anomalies using Elastic. It's not perfect, but monitoring for the loading of BPF programs via sys_enter_bpf helps catch the initial installation. Here is the basic query we use:
process where host.os.type == "linux" and syscall.name == "bpf" and process.executable != "/usr/sbin/bpftool"
The challenge is definitely the overhead on older gateway hardware. We've had to limit sampling to specific critical subnets.
From a pentester perspective, the supply chain attacks are terrifyingly effective. I've seen several orgs still allowing pip install directly from PyPI in their CI/CD pipelines without pinning versions or checking hashes. If an attacker owns a popular library, they own your build environment. The litellm incident should be a wake-up call to air-gap your dev environments or at least use strict private proxies.
Regarding the Apple/UK age checks mentioned in the recap—while boring, it forces a lot of legacy device users into compliance loops or upgrades. We've seen a spike in support tickets where users try to bypass these checks, accidentally exposing themselves to phishing sites posing as 'verification' pages. It's a social engineering goldmine. Stay sharp on the awareness training front.
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