Which versions of СityTalk.CommonLibrary are malicious?

The following NuGet versions of СityTalk.CommonLibrary are flagged malicious: 1.0.0, 1.0.1. Treat any of these as compromised.

How do I remediate СityTalk.CommonLibrary if I installed it?

Remove СityTalk.CommonLibrary 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 СityTalk.CommonLibrary — how do I know if it already compromised me?

If СityTalk.CommonLibrary 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.

Is СityTalk.CommonLibrary part of a known attack campaign?

Yes — СityTalk.CommonLibrary is associated with the RLMA-2025-00554, RLMA-2026-00008 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find СityTalk.CommonLibrary across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for СityTalk.CommonLibrary (2 malicious versions).

Malicious package

СityTalk.CommonLibraryNuGet

Advisory published Feb 3, 2025Updated Mar 19, 2026

СityTalk.CommonLibrary is a confirmed malicious NuGet package (MAL-2025-897) that executes malicious code on install (malicious versions 1.0.0, 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in СityTalk.CommonLibrary (NuGet)

MAL-2025-897

Immediate action

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

remove СityTalk.CommonLibrary

Malicious versions

2 flagged

1.0.01.0.1

Indicators of compromise (SHA-256)

e2b061c1ff3ed51f1e84483b76a2b43d0acf5c0ca62dea05f972a33b353962e8

55482e0d99738439b46c770e0bce58fccd58894930d156a6787879a155ada293

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for СityTalk.CommonLibrary (2 malicious versions).
If you installed it — respond
Remove СityTalk.CommonLibrary 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 СityTalk.CommonLibrary 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. СityTalk.CommonLibrary on NuGet has been identified as a malicious package (versions 1.0.0, 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-00554RLMA-2026-00008

Credits

ReversingLabs · finder

Detect & block this

O3 blocks СityTalk.CommonLibrary-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

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