dolyame-ui-breadcrumbsnpm
dolyame-ui-breadcrumbs is a confirmed malicious npm package (MAL-2026-13138) that opens a backdoor for remote access (malicious version 35.6.5). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in dolyame-ui-breadcrumbs (npm)
What this malware does
On require() of dolyame-ui-breadcrumbs, index.js loads bridge.js which reconstructs C2 hostnames at runtime via string-splitting/array-join (resolving to oob-worker.cf<id>.workers.dev with a DNS-TXT chunked fallback via sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), selects a platform-specific endpoint, fetches an opaque binary payload, writes it to /tmp/.cache<uid> on Unix or %TEMP%/dotnet_diag_<uid>.exe on Windows under disguised names, chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. A freshness marker is written to /tmp/.analytics_state. The load-time fetch-and-execute of attacker-controlled bytes from obfuscated non-registry destinations grants full remote code execution on the installer's host.
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 dolyame-ui-breadcrumbs (version 35.6.5). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging dolyame-ui-breadcrumbs across your stack and pipelines.
If you installed it — respond
dolyame-ui-breadcrumbs 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 dolyame-ui-breadcrumbs 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 dolyame-ui-breadcrumbs 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 dolyame-ui-breadcrumbs-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.