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Malicious package

exfiltestwand4RubyGems

Advisory published Updated

exfiltestwand4 is a confirmed malicious RubyGems package (MAL-2026-7676) that executes malicious code on install (malicious version 0.0.4). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in exfiltestwand4 (RubyGems)

MAL-2026-7676
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
gem uninstall exfiltestwand4

Malicious versions

1 flagged
0.0.4

Indicators of compromise (SHA-256)

b71657b856b7b1040f42f28cc66f389299367a7338ed0d8f1aae6b2359aee52b
5f82c01e29375ce4dccd85ce2a8f4bec434a926d996cb8a00195809f7c5fa549

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for exfiltestwand4 (version 0.0.4).

  2. If you installed it — respond

    Remove exfiltestwand4 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 exfiltestwand4 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. exfiltestwand4 on RubyGems has been identified as a malicious package (version 0.0.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-02327RLUA-2026-08072

References

Credits

  • ReversingLabs · finder

Detect & block this

O3 blocks exfiltestwand4-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

exfiltestwand4 (RubyGems) malicious package — MAL-2026-7676 | O3 Security