ghtier
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OrganizationJuly 2025

Toptal repo-visibility flip and wiper

73 repositories in the org went public within a five-minute window; at least 10 contained code to exfiltrate GitHub auth tokens and destroy victim systems. The payloads sat in preinstall/postinstall hooks, sending the token to a webhook endpoint then recursively deleting files on Windows and Linux. About 5,000 downloads occurred before removal. This was an org-owner compromise, and the very first action taken was flipping repo visibility.

Permissions abused

Org owner (bulk repo visibility change)npm pre/postinstall token exfiltration

Frameworks

Contained. First seen July 2025. Mapping by ghtier, not yet reviewed. Threat landscape