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Malicious package

testhgabc42RubyGems

Advisory published Updated

testhgabc42 is a confirmed malicious RubyGems package (MAL-2026-8979) that executes malicious code on install (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in testhgabc42 (RubyGems)

MAL-2026-8979
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall testhgabc42

Malicious versions

1 flagged
0.0.1

Indicators of compromise (SHA-256)

61b8c9f54053a1e26545805a9594a6fc64760a5107dd88ea94c586f0e1d30a39
8fd27820699b67d1a686a6fe5187aee430fc1be5ede2ac65a7017f1c73a2243f

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for testhgabc42 (version 0.0.1).

  2. If you installed it — respond

    Remove testhgabc42 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 testhgabc42 was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. testhgabc42 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-2026-03630RLUA-2026-09554

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks testhgabc42-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.

Explore

testhgabc42 (RubyGems) malicious package — MAL-2026-8979 | O3 Security