`https://teams.onweblive.org/api/update/8555575039/4`

https://teams.onweblive.org/api/update/8555575039/4 is a payload URL 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.

payload url APT38 MATCHED IN SOURCE

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

Source

…URL Payload download endpoint teams.onweblive.org Domain Post Compromise PowerShell backdoor delivery domain https://teams.onweblive.org/api/update/8555575039/4 URL Post Compromise PowerShell backdoor download endpoint maskasd.com Domain Post Compromise C2 beacon domain…
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.