# MAL-2026-13144: Malicious code in dolyame-ui-checkbox (npm) - **Type:** Malicious package - **Package:** `dolyame-ui-checkbox` (npm) - **Published:** 5 Aug 2026 ## What is MAL-2026-13144? MAL-2026-13144 is a malicious package in dolyame-ui-checkbox, published on 5 Aug 2026. ### Official description On require of the package, index.js loads _vendor.js, which reconstructs a set of C2 hostnames from string-split fragments (four *.workers.dev mirrors and a *.dl.wel1.ru DNS-TXT fallback), selects a per-platform endpoint, downloads an attacker-controlled binary via https.get (or reassembles it from chunked base64 DNS TXT records at c./. when HTTPS is blocked), writes it to /var/tmp on Unix or %TEMP% on Windows under cover-story names such as.cache_ or dotnet_diag_.exe, chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. A second, functionally equivalent dropper is packaged as lib/telemetry.js (81 KB), disguised as an analytics SDK, implementing the same fetch->chmod 755->spawn('/bin/sh','-c', path+' &') pattern with a base64-decoded payload path. Host reconstruction via string-splitting and the DNS-TXT covert transport are anti-analysis features paired with the dropper. ## What should I do about MAL-2026-13144? Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed. ## Fix prompt for AI coding agents ```text MAL-2026-13144 is a malicious package: dolyame-ui-checkbox (npm). Every version was published to cause harm. Task: 1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies. 2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for. 3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated. 4. If the package is not used anywhere, say so and change nothing. Reference: https://insights.sbomify.com/MAL-2026-13144/ (Markdown: https://insights.sbomify.com/MAL-2026-13144/index.md) ``` ## Sources - OSV: https://osv.dev/vulnerability/MAL-2026-13144 --- From sbomify Insights: https://insights.sbomify.com/MAL-2026-13144/ Summaries are generated and may contain mistakes; the official description above is the record.