blocks-sahred-atom-mobile-app-bar-actionnpm
blocks-sahred-atom-mobile-app-bar-action is a confirmed malicious npm package (MAL-2026-12859) that opens a backdoor for remote access (malicious version 35.6.8). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in blocks-sahred-atom-mobile-app-bar-action (npm)
What this malware does
On require() of this package, index.js exposes a trivial stub class and then loads bridge.js, which selects a platform-specific endpoint, fetches an opaque binary from string-split-obfuscated Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS TXT fallback channel over sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru carrying base64-chunked payload. The fetched bytes are written to /tmp or %TEMP% under disguised names (.cache<rnd> on Unix, dotnet_diag_<rnd>.exe on Windows), chmod 0755 on Unix, and spawned detached via /bin/sh -c or cmd.exe. C2 hostnames are assembled from split string arrays joined at runtime to evade static matching. The package name misspells 'shared' as 'sahred' and poses as a mobile SDK while the sibling _bridge.js performs the drop-and-execute.
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 blocks-sahred-atom-mobile-app-bar-action (version 35.6.8). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging blocks-sahred-atom-mobile-app-bar-action across your stack and pipelines.
If you installed it — respond
blocks-sahred-atom-mobile-app-bar-action 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 blocks-sahred-atom-mobile-app-bar-action 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 blocks-sahred-atom-mobile-app-bar-action 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 blocks-sahred-atom-mobile-app-bar-action-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.