`easy-day-js`

easy-day-js is an npm package that one published source reports in connection with APT38 activity, which public reporting attributes to North Korea (DPRK). It is cited here from Microsoft. The report is dated 2026-06-18.

npm package APT38 MATCHED IN SOURCE Live malware checked 2026-10-05

OSV advisories

MAL-2026-5979 published 2026-06-17 Malicious code in easy-day-js (npm)

First seen 2026-06-18 · last seen 2026-06-18

Source

…<homedir>/<random_hex>.js File artifact Downloaded second-stage payload Package indicators Indicator Type Description easy-day-js npm package Malicious typosquat of dayjs sergey2016 npm account Publisher of easy-day-js ehindero npm account Compromised publisher of 140+…
From package to postinstall payload: Inside the Mastra npm supply chain compromise by Sapphire Sleet | Microsoft Security Blog — Microsoft · under “Indicators of compromise (IOC)” · published 2026-06-18 · pulled 2026-10-03

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Related indicators

Cited by the same report: From package to postinstall payload: Inside the Mastra npm supply chain compromise by Sapphire Sleet | Microsoft Security Blog

Microsoft lists 11 other indicators in this source.