rustsec-2026-0102
Vulnerability from osv_rustsec
Published
2026-04-13 12:00
Modified
2026-04-15 21:38
Summary
`microsoftsystem64` was removed from crates.io for malicious code
Details
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.
The 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.
Thanks to Socket.dev and sitsh for detecting and reporting this to the crates.io team!
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"categories": [
"malicious"
],
"cvss": null,
"informational": null
},
"ecosystem_specific": {
"affected_functions": null,
"affects": {
"arch": [],
"functions": [],
"os": []
}
},
"package": {
"ecosystem": "crates.io",
"name": "microsoftsystem64",
"purl": "pkg:cargo/microsoftsystem64"
},
"ranges": [
{
"events": [
{
"introduced": "0.0.0-0"
}
],
"type": "SEMVER"
}
],
"versions": []
}
],
"aliases": [],
"database_specific": {
"license": "CC0-1.0"
},
"details": "`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!",
"id": "RUSTSEC-2026-0102",
"modified": "2026-04-15T21:38:09Z",
"published": "2026-04-13T12:00:00Z",
"references": [
{
"type": "PACKAGE",
"url": "https://crates.io/crates/microsoftsystem64"
},
{
"type": "ADVISORY",
"url": "https://rustsec.org/advisories/RUSTSEC-2026-0102.html"
}
],
"related": [],
"severity": [],
"summary": "`microsoftsystem64` was removed from crates.io for malicious code"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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