spellcheckers

Details

**Severity:** Critical

**Affected versions:** `> 0`

## Source: google-open-source-security (c83520810b148ec74e509b16851a1fafa1bec576b502a5debabd9b52520d9754)
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.

## Source: kam193 (6585d4c29dd97a1e46f30047c7d67a6e4bbb19f9b41bc1f9ff0b5fc34b839c75)
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


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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.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/spellcheckers/MAL-2025-191533.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/spellcheckers
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/spellcheckers/MAL-2025-191533.json
- https://helixguard.ai/blog/malicious-spellcheckers-2025-11-19
- https://securityonline.info/pypi-typosquat-delivers-multi-layer-python-rat-bypassing-scanners-with-xor-encryption
- https://www.aikido.dev/blog/malicious-pypi-packages-spellcheckpy-and-spellcheckerpy-deliver-python-rat
- https://github.com/advisories/GHSA-v8rv-jh9g-m67f

Compromised versions (1)

• > 0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.