sme-rko-finance-front-shared-entity-groups-modelsnpm
sme-rko-finance-front-shared-entity-groups-models is a confirmed malicious npm package (MAL-2026-12440) that opens a backdoor for remote access (malicious version 20.2.8). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in sme-rko-finance-front-shared-entity-groups-models (npm)
What this malware does
index.js unconditionally requires./_polyfill.js on load. _polyfill.js constructs C2 hostnames at runtime via Array.join to evade static inspection (assembling oob-worker.cf10[0-3]-*.workers.dev mirrors plus a DNS-TXT fallback under *.dl.well1.site), fetches a platform-specific binary via https.get, writes it to /tmp or %TEMP% under cover-story filenames (dotnet_diag_*.exe, .cache_*, .analytics_state), sets mode 0755, and spawns it detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}) (or the cmd equivalent on Windows). Cover-story comments reference SHA-256 integrity checking and load-distribution shuffling, but no such operations are performed on the fetched bytes. lib/telemetry.js ships duplicate dropper primitives (Buffer.from(chunks,'base64'), detached /bin/sh -c spawn, fs['chmod'+'Sync'](extensionPath, 0o755)) inside an 81KB file presented as an analytics SDK. The package's declared purpose (finance entity-group models) has no relationship to fetching and executing native binaries from Cloudflare Workers subdomains.
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
Backdoor / remote accessFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for sme-rko-finance-front-shared-entity-groups-models (version 20.2.8). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging sme-rko-finance-front-shared-entity-groups-models across your stack and pipelines.
If you installed it — respond
sme-rko-finance-front-shared-entity-groups-models establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If sme-rko-finance-front-shared-entity-groups-models 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 sme-rko-finance-front-shared-entity-groups-models 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 sme-rko-finance-front-shared-entity-groups-models-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.