Which versions of textwrap-formatter are malicious?

The following PyPI versions of textwrap-formatter are flagged malicious: 1.2.4, 1.2.5. Treat any of these as compromised.

How do I remediate textwrap-formatter if I installed it?

textwrap-formatter 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 textwrap-formatter — how do I know if it already compromised me?

If textwrap-formatter was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is textwrap-formatter part of a known attack campaign?

Yes — textwrap-formatter is associated with the 2026-05-ninja-core-utils 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 textwrap-formatter across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for textwrap-formatter (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging textwrap-formatter across your stack and pipelines.

Malicious package

textwrap-formatterPyPI

Malicious code in textwrap-formatter (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2026-3403

Immediate action

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

pip uninstall textwrap-formatter

What this malware does

During installation, obfuscated code exfiltrates cryptocurrency wallet data to a hardcoded location and places a backdoor through a new authorized SSH key. Information about the placed backdoor is sent back to the attacker, and sshd configuration is adjusted to ensure the successful remote connection.

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

Campaign: 2026-05-ninja-core-utils

Reasons (based on the campaign):

The package overrides the install command in setup.py to execute malicious code during installation.
obfuscation
crypto-related
exfiltration-crypto
backdoor

Malicious versions

2 flagged

1.2.41.2.5

Indicators of compromise (SHA-256)

18da24e92fd40457ad3df2af568c07d41b35f44e6e07e8fac3bf0eafba9c2154

ec3c4972c82dc17c39d06d5cbb6eeb3fc330a6bf31a986fd33e44563d167dfbd

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for textwrap-formatter (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging textwrap-formatter across your stack and pipelines.
If you installed it — respond
textwrap-formatter 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 textwrap-formatter was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks textwrap-formatter before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. textwrap-formatter on PyPI has been identified as a malicious package (versions 1.2.4, 1.2.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-05-ninja-core-utils

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks textwrap-formatter-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