Which versions of spellcheckers are malicious?

The following PyPI versions of spellcheckers are flagged malicious: 1.0.0, 1.1.0, 1.1.1, 1.2.0, 1.3.0, 1.4.0, 1.5.0. Treat any of these as compromised.

How do I remediate spellcheckers if I installed it?

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

If spellcheckers 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 spellcheckers part of a known attack campaign?

Yes — spellcheckers is associated with the 2025-11-spellcheckers 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 spellcheckers 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 spellcheckers (7 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging spellcheckers across your stack and pipelines.

Malicious package

spellcheckersPyPI

Malicious code in spellcheckers (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2025-191533

Immediate action

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

pip uninstall spellcheckers

What this malware does

This package is malicious and typosquating the legitimate pyspellchecker library. This package will deploy a remote-access trojan that allows the attacker full control of the victim's host.

Package contains hidden code that is effectively run during importing and downloads second stage code. Then, a process running in background periodically connects to a remote host and waits for next code to execute

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

Campaign: 2025-11-spellcheckers

Reasons (based on the campaign):

obfuscation
Downloads and executes a remote malicious script.
The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.

Malicious versions

7 flagged

1.0.01.1.01.1.11.2.01.3.01.4.01.5.0

Indicators of compromise (SHA-256)

c83520810b148ec74e509b16851a1fafa1bec576b502a5debabd9b52520d9754

be6181a6e093f3690fb5ea437000e85951c02043f8e9c04d51129adf65e1ba47

6585d4c29dd97a1e46f30047c7d67a6e4bbb19f9b41bc1f9ff0b5fc34b839c75

f1480b0a527a5822a51a4c61b868fd8f3adbcf1d117e98fb5c3cd776a1a8dd0d

079f275754257ece01048207316e48f31bf7b67b5374a442eaf430c29c0e324e

c08a71d4505792aedda6306cf827fe3bae40ffc887922bd1869dc08c27bd18ff

38fcddbdb282b32cfe5f0ec1a7d026f8247e88fc164d34ecdda8d53294ec37f2

94d56ad51850af2cd423312c4fd3ff9b1bacf1a84684cde7998740e91aa80dd3

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 spellcheckers (7 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging spellcheckers across your stack and pipelines.
If you installed it — respond
spellcheckers 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 spellcheckers 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 spellcheckers 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. spellcheckers on PyPI has been identified as a malicious package (versions 1.0.0, 1.1.0, 1.1.1, 1.2.0, 1.3.0, 1.4.0, 1.5.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2025-11-spellcheckers

References

Credits

Kamil Mańkowski (kam193)

Detect & block this

O3 blocks spellcheckers-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