---
id: 6178
title: "PCPJack Hijacked 230 AWS, GCP, and Azure Servers to Run a Hidden SMTP Relay Network"
source_domain: hunt.io
source_url: "https://hunt.io/blog/pcpjack-230-cloud-servers-smtp-proxy-network-sliver-chisel"
published_at: "2026-06-03T00:00:00Z"
tags: ["cloud", "threat-intelligence", "sliver", "smtp-relay", "proxy-network", "cloud-infrastructure", "chisel"]
phying_url: "https://phying.com/item/6178"
lang: en
---

# PCPJack Hijacked 230 AWS, GCP, and Azure Servers to Run a Hidden SMTP Relay Network

## Summary

Hunt.io recovered a 12-file SMTP proxy toolkit from exposed PCPJack infrastructure, showing how 230 hijacked cloud servers were turned into a persistent email relay network with Sliver and Chisel.

## Intelligence Metadata

- **Sources:** hunt.io
- **Published:** 2026-06-03T00:00:00Z
- **Original:** https://hunt.io/blog/pcpjack-230-cloud-servers-smtp-proxy-network-sliver-chisel
- **Phying News:** https://phying.com/item/6178