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Malicious package

agfossstd21RubyGems

Malicious code in agfossstd21 (RubyGems) Remove it immediately and rotate any exposed credentials.

MAL-2026-7478
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall agfossstd21

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

7028289d7125c2633995fb6c57c8740e2fa5b944a146ee369dfaa7c88027051a

Detection & response playbook

Malicious package
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for agfossstd21 (version 0.0.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging agfossstd21 across your stack and pipelines.

  2. If you installed it — respond

    Remove agfossstd21 from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If agfossstd21 was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks agfossstd21 before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. agfossstd21 on RubyGems has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-02129

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks agfossstd21-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

agfossstd21 (RubyGems) malicious package — MAL-2026-7478 | O3 Security