PCPJack Hijacks 230 AWS, Google Cloud, and Azure Servers for Covert SMTP Relay Network
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PCPJack Exposed: Researchers Uncover 230-Node Cloud Email Relay Network
PCPJack Exposed: Researchers Uncover 230-Node Cloud Email Relay Network Pierluigi Paganini June 05, 2026 Researchers uncovered a 230-node cloud-based email relay network after the actor PCPJack accidentally exposed tools, logs, and C2 files online A threat actor tracked as PCPJack compromised 230 cloud servers across Amazon Web Services, Google Cloud, and Microsoft Azure and turned them into a covert email relay network. Hunt.io …
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unsafe.shPCPJack Hijacks 230 AWS, Google Cloud, and Azure Servers for Covert SMTP Relay Network
The threat actor known as PCPJack has hijacked cloud servers associated with Amazon Web Services (AWS), Google Cloud, and Microsoft Azure to create a covert SMTP email relay network. "Compromised business servers across the U.S., Europe, and Asia were quietly converted into SMTP proxies, verified for mail relay capability, and synced to a downstream consumer every five minutes," Hunt.io said in
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