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Threat Intelligence Report

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

๐Ÿ“… June 23, 2026 ๐Ÿ“ฐ hunt.io ๐Ÿ” 1 CVE(s) referenced

PCPJack hijacked 230 AWS, GCP, and Azure Linux servers to covertly build a global SMTP relay network using commodity tunneling tools, exposing a sophisticated, rapidly evolving cloud exploitation campaign.

unclassified
CVE-2021-4034

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๐Ÿ“Š Visual Mindmap
๐ŸŽฏ IOC Extraction
โš”๏ธ MITRE ATT&CK TTPs
๐Ÿ“ฆ STIX 2.1 Bundle