Microsoft Security Blog: Enterprise Mitigation Guidance for Axios npm Compromise

Microsoft Security Blog·medium signal

Microsoft's security team published detailed mitigation guidance on April 1 for the Axios npm compromise, including specific detection queries for Microsoft Defender, Sentinel hunting queries, and step-by-step remediation for affected organizations. The blog confirms Microsoft Threat Intelligence's attribution to Sapphire Sleet and provides IOCs (indicators of compromise) for the sfrclak[.]com C2 infrastructure. Essential reading for enterprise teams running Node.js infrastructure who need to verify they weren't exposed during the 2-3 hour window.