{"id":"RUSTSEC-2026-0102","aliases":[],"status":"published","title":"`microsoftsystem64` was removed from crates.io for malicious code","description":"`microsoftsystem64` installs a hardcoded SSH authorized_keys entry (persistence/backdoor) and scans for sensitive files (.env, credential-like JSON names, keyword-matching docs), reads their contents, base64-encodes where needed, and exfiltrates everything to a remote server via HTTP. It also packages and uploads Telegram Desktop tdata, indicating targeted credential/session/data harvesting.\n\nThe malicious crate had 9 versions published on 2026-04-09 that had a total of 6346 downloads. There were no crates depending on this crate on crates.io.\n\nThanks to [Socket.dev](https://socket.dev/) and [sitsh](https://sit.sh/) for detecting and reporting this to the crates.io team!","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2026-04-13T12:00:00Z","modified":"2026-04-15T21:45:06Z","affected":[{"source":"osv","ecosystem":"crates.io","package":"microsoftsystem64","ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"}]}]}],"references":[{"url":"https://crates.io/crates/microsoftsystem64","tags":["package"]},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0102.html","tags":["advisory"]}],"sources":{"osv":[{"id":"RUSTSEC-2026-0102","title":"`microsoftsystem64` was removed from crates.io for malicious code","description":"`microsoftsystem64` installs a hardcoded SSH authorized_keys entry (persistence/backdoor) and scans for sensitive files (.env, credential-like JSON names, keyword-matching docs), reads their contents, base64-encodes where needed, and exfiltrates everything to a remote server via HTTP. It also packages and uploads Telegram Desktop tdata, indicating targeted credential/session/data harvesting.\n\nThe malicious crate had 9 versions published on 2026-04-09 that had a total of 6346 downloads. There were no crates depending on this crate on crates.io.\n\nThanks to [Socket.dev](https://socket.dev/) and [sitsh](https://sit.sh/) for detecting and reporting this to the crates.io team!","status":"published","published":"2026-04-13T12:00:00Z","modified":"2026-04-15T21:45:06.966176Z","updated_at":"2026-11-02T15:53:40.430679Z"}]}}