Which versions of sher-server-tool are malicious?

The following PyPI versions of sher-server-tool are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate sher-server-tool if I installed it?

sher-server-tool is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed sher-server-tool — how do I know if it already compromised me?

If sher-server-tool 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 sher-server-tool part of a known attack campaign?

Yes — sher-server-tool is associated with the 2026-04-sher-net 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 sher-server-tool across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for sher-server-tool (version 0.0.1).

Malicious package

sher-server-toolPyPI

Advisory published Apr 17, 2026Updated Apr 17, 2026

sher-server-tool is a confirmed malicious PyPI package (MAL-2026-2840) that steals credentials and exfiltrates sensitive data (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in sher-server-tool (PyPI)

MAL-2026-2840

Immediate action

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

pip uninstall sher-server-tool

What this malware does

Starting the module activates a hardcoded telegram bot allowing remote code execution, data exfiltration, collecting webcam photos, clipboard data, etc.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-04-sher-net

Reasons (based on the campaign):

The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.
rat
spyware-like

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

e83ee8187475c07ed6ea406a698e3f9d3c55efec8e689ba0c110a6ee2ce1012b

5410b94d691b7b974afe04b9219d88e99af1bf3903e2aca32d6426b8ded0971c

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for sher-server-tool (version 0.0.1).
If you installed it — respond
sher-server-tool is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If sher-server-tool 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. sher-server-tool on PyPI has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-04-sher-net

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · analyst

Detect & block this

O3 blocks sher-server-tool-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database