Trojanized npm Packages Use Blockchain to Hide C2 IP (NullReceiver)

Thu, 06 Aug 2026 13:03:19 +0000

Engineer — Act: Two named malicious packages — ‘bianira-ui’ and ‘fluid-type-ui’ — are trojanized with active C2 capability; audit all dependency trees and lock files for these packages and remove them immediately if found.
SOC/IR — Plan: NullReceiver is a novel dead-drop resolver technique that hides C2 IPs inside empty Ethereum transfer destinations, making traditional blocklist-based detections ineffective; build or tune detections for unusual outbound Ethereum RPC calls originating from build pipelines or developer endpoints this quarter.
Leader — Learn: Attackers are using blockchain infrastructure to evade C2 detection in software supply-chain attacks — a technique evolution worth including in risk-posture discussions, but no immediate leadership action is required given the limited scope and absence of a major corroborated campaign.

Npm-Supply-Chain on CuraSec