twork-data-services-counterfreenpm
twork-data-services-counterfree is a confirmed malicious npm package (MAL-2026-12289) that executes malicious code on install (malicious version 20.1.3). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in twork-data-services-counterfree (npm)
What this malware does
index.js unconditionally requires./init on load. init.js selects a platform-specific binary path, fetches an opaque payload over HTTPS from attacker-controlled Cloudflare Workers hosts whose hostnames are assembled at runtime by joining short string fragments (e.g. 'oob-worker.cf102' + '-baf.work' + 'ers.' + 'dev' → oob-worker.cf102-baf.workers.dev; sibling hosts oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev). If HTTPS mirrors are unreachable, the loader falls back to a DNS-TXT covert channel: it resolves TXT on c.<domain> under *.dl.well1.site (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site) to obtain a chunk count, resolves numbered subdomains to collect base64 chunks, and reassembles the payload. The bytes are written to /tmp or %TEMP% under deceptive names masquerading as system tooling (dotnet_diag<rnd>.exe on Windows,.cache<rnd> /.analytics_state on POSIX), chmod 0o755 is applied on POSIX, and the binary is spawned detached via cp.spawn('/bin/sh', ['-c', fp+' &'], {detached:true}).unref() or the Windows cmd equivalent. Fires on require() of the package, so any consumer that installs and loads twork-data-services-counterfree executes attacker-controlled code with the installer's privileges.
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 twork-data-services-counterfree (version 20.1.3). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging twork-data-services-counterfree across your stack and pipelines.
If you installed it — respond
Remove twork-data-services-counterfree 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 twork-data-services-counterfree 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 twork-data-services-counterfree 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 twork-data-services-counterfree-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.