Which versions of DevLib.ModernUI.WinForm are malicious?

The following NuGet versions of DevLib.ModernUI.WinForm are flagged malicious: 2.17.8. Treat any of these as compromised.

How do I remediate DevLib.ModernUI.WinForm if I installed it?

Remove DevLib.ModernUI.WinForm 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 DevLib.ModernUI.WinForm — how do I know if it already compromised me?

If DevLib.ModernUI.WinForm 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 DevLib.ModernUI.WinForm part of a known attack campaign?

Yes — DevLib.ModernUI.WinForm is associated with the RLMA-2024-03257 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 DevLib.ModernUI.WinForm across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for DevLib.ModernUI.WinForm (version 2.17.8).

Malicious package

DevLib.ModernUI.WinFormNuGet

DevLib.ModernUI.WinForm is a confirmed malicious NuGet package (MAL-2024-4465) that executes malicious code on install (malicious version 2.17.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in DevLib.ModernUI.WinForm (NuGet)

MAL-2024-4465

Immediate action

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

remove DevLib.ModernUI.WinForm

Malicious versions

1 flagged

2.17.8

Indicators of compromise (SHA-256)

3b366e62336f4db3abf5823cc0f4945b7dd90f126e0796e23d1b48844d175fb1

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for DevLib.ModernUI.WinForm (version 2.17.8).
If you installed it — respond
Remove DevLib.ModernUI.WinForm 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 DevLib.ModernUI.WinForm 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. DevLib.ModernUI.WinForm on NuGet has been identified as a malicious package (version 2.17.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-03257

Credits

ReversingLabs · finder

Detect & block this

O3 blocks DevLib.ModernUI.WinForm-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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