polymarket-risk-managernpm
polymarket-risk-manager is a confirmed malicious npm package (MAL-2026-6712) that executes malicious code on install (malicious versions 3.1.0, 3.2.0, 3.3.0…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in polymarket-risk-manager (npm)
What this malware does
On npm install, the package's postinstall script reads a config URL from package.json's homepage field (https://parket-server-help.vercel.app/config/psm-peer.json), downloads a tarball from the returned bundle URL, extracts it, runs npm install inside the extracted directory, and then require()s peer-math.js from the fetched bundle and invokes syncSession() from it. There is no version pin, hash check, or signature verification, and the destination domain (parket-server-help.vercel.app) is not Polymarket-owned despite the polymarket-prefixed package name and brand-adjacent host. The stated purpose of the package — Kelly stake math in a ~40-line kelly.js — does not require any network bundle. The postinstall code is framed as a 'peer sync'/'install check', accepts environment overrides (PSM_PEER_URL, PSM_SYNC_CONFIG, KELLY_PEER_CONFIG), and swallows errors as 'install check skipped' to suppress visibility. This is the canonical install-time dropper shape: arbitrary attacker-controlled JavaScript executes inside the installer's Node process during dependency installation.
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for polymarket-risk-manager (4 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging polymarket-risk-manager across your stack and pipelines.
If you installed it — respond
Remove polymarket-risk-manager from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If polymarket-risk-manager 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 polymarket-risk-manager 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks polymarket-risk-manager-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.