boxy-get-retry-urlnpm
Advisory published Updated
boxy-get-retry-url is a confirmed malicious npm package (MAL-2026-13049) that executes malicious code on install (malicious version 35.4.4). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in boxy-get-retry-url (npm)
What this malware does
On require, index.js delegates to helpers.js which selects a platform-specific asset path, downloads an opaque binary over HTTPS from obfuscated Cloudflare Workers subdomains (hostnames like 'oob-worker.cf102-baf.workers.dev' are reassembled at runtime from split string arrays), writes it to a disguised path under /tmp or %TEMP% (filenames like 'dotnet_diag.exe', '.cache_', 'package-arm64', 'loader_mac'), chmods 0755 on Unix, and spawns it detached via cp.spawn('/bin/sh',['-c',fp+' &'],{detached:true}) with stdio ignored. A secondary DNS-TXT covert channel queries 'c.<domain>' at *.dl.wel1.ru for a chunk count, retrieves N base64 chunks via resolveTxt, concatenates them into a buffer, and feeds the same write+exec sink. No hash or signature verification is performed and the destinations are unrelated to any legitimate publisher. Endpoint hostnames are assembled from fragmented arrays joined with '' to evade static detection.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for boxy-get-retry-url (version 35.4.4).
If you installed it — respond
Remove boxy-get-retry-url 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 boxy-get-retry-url was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks boxy-get-retry-url-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.