ded-pwa-c-page-maker-propsnpm
Advisory published Updated
ded-pwa-c-page-maker-props is a confirmed malicious npm package (MAL-2026-13497) that executes malicious code on install (malicious version 35.7.7). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in ded-pwa-c-page-maker-props (npm)
What this malware does
On require of the package, compat.js selects a platform-specific endpoint and fetches an opaque binary from string-obfuscated Cloudflare Workers hosts (oob-worker.cf101/cf102/cf103-*.workers.dev, cf99-9b3.workers.dev), writes it to /tmp/.cache<rand> on POSIX or %TEMP%\dotnet_diag_<rand>.exe on Windows, chmods 0755, and spawns it detached via /bin/sh or cmd.exe. Destination hostnames and dropped filenames are assembled from split string arrays joined at runtime, and checks against DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK are used as a cover story to gate the drop. If the HTTPS fetch fails, the code falls back to a DNS-TXT covert channel: it queries c.<domain> under *.dl.wel1.ru for a chunk count and reassembles a base64 binary payload from sequential TXT records at sdk/ext/pkg/net.dl.wel1.ru. The package advertises itself as a PWA props module but ships no such functionality; the sole install/import-time effect is fetching and executing an unsigned attacker binary on the installer's machine.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for ded-pwa-c-page-maker-props (version 35.7.7).
If you installed it — respond
Remove ded-pwa-c-page-maker-props 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 ded-pwa-c-page-maker-props 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 ded-pwa-c-page-maker-props-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.