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thumbscr-ews – a python EWS tool

ID: 62b444a0-c616-56a6-8081-82f1900e2674

STIX ID: report--62b444a0-c616-56a6-8081-82f1900e2674

Feed Name: SensePost Blog

Date Published: 2020-11-04

Date Updated: 2026-04-30

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This post details thumbscr-ews, a Python tool built on exchangelib to test and exploit misconfigured Exchange Web Services that allow MFA bypass, adding features like GAL enumeration, delegated access checks, mailbox search/reading, attachment downloads, folder browsing, and limited brute forcing, with references to prior EWS MFA-bypass research and related tools.

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