@uc-platform/advertisement-service-clientnpm
Advisory published Updated
@uc-platform/advertisement-service-client is a confirmed malicious npm package (MAL-2026-1639) that executes malicious code on install (malicious version 99.99.9). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in @uc-platform/advertisement-service-client (npm)
What this malware does
The package @uc-platform/advertisement-service-client was found to contain malicious code.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for @uc-platform/advertisement-service-client (version 99.99.9).
If you installed it — respond
Remove @uc-platform/advertisement-service-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 @uc-platform/advertisement-service-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
Campaign
Credits
- Amazon Inspector · finder
- ReversingLabs · finder
Detect & block this
O3 blocks @uc-platform/advertisement-service-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.