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Malicious package

resolvrtestRubyGems

Advisory published Updated

resolvrtest is a confirmed malicious RubyGems package (MAL-2026-1921) that executes malicious code on install (malicious version 0.0.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in resolvrtest (RubyGems)

MAL-2026-1921
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall resolvrtest

Malicious versions

1 flagged
0.0.3

Indicators of compromise (SHA-256)

50ddeeec9e376d2b1ed76ba8bb173cc346882dc14b354cfc8cf40226fbf75cea
0d4f077106e7802f866023c9e8cfe33179f9342ace718980fc77276a6d809d0d

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for resolvrtest (version 0.0.3).

  2. If you installed it — respond

    Remove resolvrtest 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 resolvrtest 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. resolvrtest on RubyGems has been identified as a malicious package (version 0.0.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-00957RLUA-2026-09032

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks resolvrtest-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

resolvrtest (RubyGems) malicious package — MAL-2026-1921 | O3 Security