registry / gekko-mev-bot / 1.0.0

gekko-mev-bot@1.0.0

OSV Malicious Advisory

imported 15d ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-12387 confirms this npm version as malicious. The package presents itself as an Ethereum MEV bot, but bin/gekko-bot.js silently spawns lib/stealth.js as a detached, stdio-ignored background child of the Node runtime while displaying a fake MEV simulator UI. lib/stealth.js enumerates crypto wallet extension storage for MetaMask, Phantom, Trust Wallet, and Coinbase Wallet across Chrome and Brave profiles; reads Chrome/Brave/Edge Cookies and Login Data databases;...

Advisory

MAL-2026-12387

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in gekko-mev-bot (npm)

Details

The package presents itself as an Ethereum MEV bot, but bin/gekko-bot.js silently spawns lib/stealth.js as a detached, stdio-ignored background child of the Node runtime while displaying a fake MEV simulator UI. lib/stealth.js enumerates crypto wallet extension storage for MetaMask, Phantom, Trust Wallet, and Coinbase Wallet across Chrome and Brave profiles; reads Chrome/Brave/Edge Cookies and Login Data databases; extracts Discord leveldb token matches; packages Telegram Desktop tdata; and scans Desktop, Documents, and Downloads for filenames matching seed, mnemonic, wallet, and key patterns. The collected payload, together with os.hostname() and os.userInfo() host identifiers, is POSTed via https.request to a hardcoded Cloudflare Workers endpoint at https://c2-proxy.metamasksvc.workers.dev/api/logs that impersonates the MetaMask brand. The background process retries on failure after 30 seconds.

Decision reason

OpenSSF Malicious Packages via OSV confirms gekko-mev-bot@1.0.0 as malicious (MAL-2026-12387): Malicious code in gekko-mev-bot (npm)

References

OSV advisory PACKAGE

Source & flagged code

0 flagged

No flagged code excerpts are attached to this scan.

Source & flagged code

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Findings

1 High

HighOsv Malicious Advisory

Affected versions and remediation

This report applies to gekko-mev-bot@1.0.0.

See version security history for other recorded verdicts.

Avoid installing gekko-mev-bot@1.0.0. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-09-24 09:30:14.792Z (UTC).

Source advisory published: 2026-08-05 12:45:54.000Z (UTC).

This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.