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OpenAdvisories
Malicious MAL-2026-4286

polymarket-data-fetcher

PyPI package · versions 1.2.4

Reported May 24, 2026 · Updated May 24, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: kam193 (b6b5ac8b803d36ef490adff8a4d3110c4030063bbd2345e4b23d1871909638e9)
The code attempts to monitor the clipboard and replace copied cryptocurrency addresses, as well as establish persistence.

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

Campaign: 2026-05-polymarket-data-fetcher

Reasons (based on the campaign):

- peristence-autorun

- obfuscation

- crypto-related

- The package contains code to detect if it is running in a sandbox environment.

- clipboard-modify

- persistence