Malware in syco1
Malware was discovered in the npm package syco1, resulting in full system compromise for any computer with the package installed or running. All affected systems should be considered fully compromised and all secrets and keys rotated immediately from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with syco1 installed or running
- Ecosystems
- Attack vectors
- Affected entities
- syco1
The npm package syco1 was found to contain malware. According to the GitHub Advisory (GHSA-9mh8-xw8w-jh9g), any computer that has this package installed or running should be considered fully compromised.\n\nImmediate action is required: all secrets and keys stored on affected computers should be rotated immediately from a different, unaffected computer. While the package should be removed, there is no guarantee that removal will eliminate all malicious software that may have been installed as a result of the package installation, given that the outside entity may have gained full control of the system.\n\nThe advisory was published on 2026-07-07 via the GitHub Advisory database.
Indicators of compromise
- Packages
- syco1
Remediation
- Immediately rotate all secrets and keys stored on affected computers from a different, unaffected computer
- Remove the syco1 package from all affected systems
- Perform a full security audit and malware scan on any system that had syco1 installed
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical infrastructure
- Review access logs and monitor for unauthorized activity on affected systems
Sources
- GitHub Advisory GHSA-9mh8-xw8w-jh9g · GitHub Advisory Database
Cite this entry
"Malware in syco1." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 7, 2026; last updated July 7, 2026. https://supplychainattack.org/incident/malware-in-syco1-j0kkd5
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