Which versions of arnavtest123 are malicious?

The following PyPI versions of arnavtest123 are flagged malicious: 1.0.1. Treat any of these as compromised.

How do I remediate arnavtest123 if I installed it?

arnavtest123 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 arnavtest123 — how do I know if it already compromised me?

If arnavtest123 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 arnavtest123 part of a known attack campaign?

Yes — arnavtest123 is associated with the 2026-02-jwrincident 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 arnavtest123 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for arnavtest123 (version 1.0.1).

Malicious package

arnavtest123PyPI

Advisory published Mar 8, 2026Updated Mar 8, 2026

arnavtest123 is a confirmed malicious PyPI package (MAL-2026-1288) that steals credentials and exfiltrates sensitive data (malicious version 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in arnavtest123 (PyPI)

MAL-2026-1288

Immediate action

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

pip uninstall arnavtest123

What this malware does

During installation, the package starts a reverse shell

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

Campaign: 2026-02-jwrincident

Reasons (based on the campaign):

The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.

Malicious versions

1 flagged

1.0.1

Indicators of compromise (SHA-256)

d77a638a8dbd52def0458fe1227c5dd5491bc8fedb0ae9e50f28eed74e4ef89d

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for arnavtest123 (version 1.0.1).
If you installed it — respond
arnavtest123 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 arnavtest123 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. arnavtest123 on PyPI has been identified as a malicious package (version 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-02-jwrincident

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks arnavtest123-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