Which versions of ЅSСMS are malicious?

The following NuGet versions of ЅSСMS are flagged malicious: 7.2.1. Treat any of these as compromised.

How do I remediate ЅSСMS if I installed it?

Remove ЅSСMS 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 ЅSСMS — how do I know if it already compromised me?

If ЅSСMS 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 ЅSСMS part of a known attack campaign?

Yes — ЅSСMS is associated with the RLMA-2024-02770, RLMA-2026-00001 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 ЅSСMS across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for ЅSСMS (version 7.2.1).

Malicious package

ЅSСMSNuGet

Advisory published Jun 25, 2024Updated Mar 19, 2026

ЅSСMS is a confirmed malicious NuGet package (MAL-2024-4717) that executes malicious code on install (malicious version 7.2.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in ЅSСMS (NuGet)

MAL-2024-4717

Immediate action

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

remove ЅSСMS

Malicious versions

1 flagged

7.2.1

Indicators of compromise (SHA-256)

dcd9599a0c74c48f9ca5644512f60e7ddf1c8afa6ca166534199e58f891978fd

39c1d333fde3aaf38b0e23b53f13a32d6ef8d3b65a8ae0257220ed85d3d171bd

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for ЅSСMS (version 7.2.1).
If you installed it — respond
Remove ЅSСMS 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 ЅSСMS 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. ЅSСMS on NuGet has been identified as a malicious package (version 7.2.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-02770RLMA-2026-00001

Credits

ReversingLabs · finder

Detect & block this

O3 blocks ЅSСMS-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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