What does the amzn-codewhisperer-streaming-client malware do?

The OpenSSF Package Analysis project identified 'amzn-codewhisperer-streaming-client' @ 99.0.1 (crates.io) as malicious. It is considered malicious because: - The package communicates with a domain associated with malicious activity. - The package executes one or more commands associated with malicious behavior.

Which versions of amzn-codewhisperer-streaming-client are malicious?

The following crates.io versions of amzn-codewhisperer-streaming-client are flagged malicious: 99.0.1. Treat any of these as compromised.

How do I remediate amzn-codewhisperer-streaming-client if I installed it?

Remove amzn-codewhisperer-streaming-client 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.

I already installed amzn-codewhisperer-streaming-client — how do I know if it already compromised me?

If amzn-codewhisperer-streaming-client 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.

How do I find amzn-codewhisperer-streaming-client across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for amzn-codewhisperer-streaming-client (version 99.0.1).

Malicious package

amzn-codewhisperer-streaming-clientcrates.io

Advisory published Apr 27, 2026Updated Jul 23, 2026

amzn-codewhisperer-streaming-client is a confirmed malicious crates.io package (MAL-2026-3103) that executes malicious code on install (malicious version 99.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in amzn_codewhisperer_streaming_client (crates.io)

MAL-2026-3103

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

remove amzn-codewhisperer-streaming-client

What this malware does

The OpenSSF Package Analysis project identified 'amzn-codewhisperer-streaming-client' @ 99.0.1 (crates.io) as malicious.

It is considered malicious because:

The package communicates with a domain associated with malicious activity.
The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged

99.0.1

Indicators of compromise (SHA-256)

7fc27be867bc1ae651b345d2f825d0ac8d796615c022747306e87bd3ff0d1fc8

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for amzn-codewhisperer-streaming-client (version 99.0.1).
If you installed it — respond
Remove amzn-codewhisperer-streaming-client 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.
Did it already run?
If amzn-codewhisperer-streaming-client 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. amzn-codewhisperer-streaming-client on crates.io has been identified as a malicious package (version 99.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks amzn-codewhisperer-streaming-client-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.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database