Which versions of Мircosоft.ЕntitуFramеworkСоrе are malicious?

The following NuGet versions of Мircosоft.ЕntitуFramеworkСоrе are flagged malicious: 9.0.0. Treat any of these as compromised.

How do I remediate Мircosоft.ЕntitуFramеworkСоrе if I installed it?

Remove Мircosоft.ЕntitуFramеworkСоrе 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 Мircosоft.ЕntitуFramеworkСоrе — how do I know if it already compromised me?

If Мircosоft.ЕntitуFramеworkСоrе 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 Мircosоft.ЕntitуFramеworkСоrе part of a known attack campaign?

Yes — Мircosоft.ЕntitуFramеworkСоrе is associated with the RLMA-2025-00553, RLMA-2026-00004 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 Мircosоft.ЕntitуFramеworkСоrе across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for Мircosоft.ЕntitуFramеworkСоrе (version 9.0.0).

Malicious package

Мircosоft.ЕntitуFramеworkСоrеNuGet

Advisory published Feb 3, 2025Updated Mar 19, 2026

Мircosоft.ЕntitуFramеworkСоrе is a confirmed malicious NuGet package (MAL-2025-896) that executes malicious code on install (malicious version 9.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in Мircosоft.ЕntitуFramеworkСоrе (NuGet)

MAL-2025-896

Immediate action

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

remove Мircosоft.ЕntitуFramеworkСоrе

Malicious versions

1 flagged

9.0.0

Indicators of compromise (SHA-256)

80e126af756cb338a3c6bf2106759c5c0fe85f9a7fe28357761b0571ed895938

d9cb0b035cdd3c36f293ec0aa9ac921df7159d0e81dd15f889b8b4798c8c5bc2

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for Мircosоft.ЕntitуFramеworkСоrе (version 9.0.0).
If you installed it — respond
Remove Мircosоft.ЕntitуFramеworkСоrе 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 Мircosоft.ЕntitуFramеworkСоrе 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. Мircosоft.ЕntitуFramеworkСоrе on NuGet has been identified as a malicious package (version 9.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-00553RLMA-2026-00004

Credits

ReversingLabs · finder

Detect & block this

O3 blocks Мircosоft.ЕntitуFramеworkСоrе-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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