Introducing SlackEnum: A User Enumeration Tool for Slack

**Executive summary:** This post presents SlackEnum, a proof-of-concept tool and operational workflow to enumerate Slack users at scale by querying Slack’s connectableContacts.lookup endpoint and bypassing rate limits through the use of many attacker-controlled Slack accounts; it documents account creation, token extraction, automation details, rate-limit handling, and output formats, serving as a technical TTP that could be used for legitimate red‑team testing or abused by malicious actors.