Malicious Next.js Node Process Spawning Shell Downloader after RSC Deserialization RCE (via process_creation)

ATT&CK techniques

Initial Access → Execution

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
- T1059.004Unix Shell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects a Node.js process spawning a shell that fetches a remote payload with wget or curl or a dev tcp socket, the post-exploitation behavior following React2Shell CVE-2025-55182 deserialization RCE in Next.js. Adversaries leverage the compromised Node runtime to pull down Mirai and dropper payloads onto the server.

Reporting behind it

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Malicious Next.js Node Process Spawning Shell Downloader after RSC Deserialization RCE (via process_creation)

Pivot detection · T1059.004 · 9 related

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