Malicious code in dolyame-boxy-fonts (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (00cfc61444739291be87199c8b4118dd762690f12041bdadcd6b5792b4a3c9c3) On require() of dolyame-boxy-fonts, index.js unconditionally loads./_loader.js, which reconstructs C2 hostnames from split-string arrays (Cloudflare Workers subdomains oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev) and a DNS-TXT fallback channel under *.dl.wel1.ru (chunk-count via c.<domain>, base64 chunks via N.<domain> retrieved through dns.resolveTxt). _loader.js downloads a platform-specific binary, writes it to /tmp or %TEMP% under a hidden/decoy name (.cache_<rand> or dotnet_diag_<rand>.exe), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. The fetched bytes are opaque, unpinned, and not hash-verified, and the destination hosts are anonymous Cloudflare Workers subdomains assembled at runtime to defeat static grep. A sibling module lib/telemetry.js ships in the tarball with the same dropper primitives (require('child_' + 'process') string-split, fs['chmod' + 'Sync'], cp.spawn('/bin/sh', ['-c', filePath + ' &'])), providing an alternate execution path. Installing or requiring this package causes attacker-controlled code to execute on the installer's machine. ## Source: ghsa-malware (8fc78c53700a2acd4b24e0604a5f8b99e8e425b04b17a32aae2ed79ae8422be9) 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.
AI Analysis
Technical Summary
The dolyame-boxy-fonts npm package version 35.4.8 includes a malicious loader script (_loader.js) that dynamically reconstructs C2 hostnames using split-string arrays and DNS TXT record fallback channels. It downloads an opaque, unverified platform-specific binary to a temporary directory under a hidden or decoy filename, sets executable permissions, and spawns the binary detached via shell commands. The package also contains a telemetry module with similar dropper capabilities. This design enables attacker-controlled code execution on any system that installs or requires this package.
Potential Impact
Installing or requiring dolyame-boxy-fonts version 35.4.8 results in arbitrary code execution on the host system. The malicious binary is downloaded and executed without integrity checks, potentially allowing attackers to run any code with the privileges of the user installing the package. This compromises system security and can lead to further malicious activities.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should avoid installing or requiring dolyame-boxy-fonts version 35.4.8. Verify the integrity and provenance of npm packages before installation. Monitor for updates or advisories from the package maintainers or npm registry regarding this issue. Patch status is not yet confirmed — check the vendor advisory or npm security advisories for current remediation guidance.
Malicious code in dolyame-boxy-fonts (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (00cfc61444739291be87199c8b4118dd762690f12041bdadcd6b5792b4a3c9c3) On require() of dolyame-boxy-fonts, index.js unconditionally loads./_loader.js, which reconstructs C2 hostnames from split-string arrays (Cloudflare Workers subdomains oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev) and a DNS-TXT fallback channel under *.dl.wel1.ru (chunk-count via c.<domain>, base64 chunks via N.<domain> retrieved through dns.resolveTxt). _loader.js downloads a platform-specific binary, writes it to /tmp or %TEMP% under a hidden/decoy name (.cache_<rand> or dotnet_diag_<rand>.exe), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. The fetched bytes are opaque, unpinned, and not hash-verified, and the destination hosts are anonymous Cloudflare Workers subdomains assembled at runtime to defeat static grep. A sibling module lib/telemetry.js ships in the tarball with the same dropper primitives (require('child_' + 'process') string-split, fs['chmod' + 'Sync'], cp.spawn('/bin/sh', ['-c', filePath + ' &'])), providing an alternate execution path. Installing or requiring this package causes attacker-controlled code to execute on the installer's machine. ## Source: ghsa-malware (8fc78c53700a2acd4b24e0604a5f8b99e8e425b04b17a32aae2ed79ae8422be9) 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.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The dolyame-boxy-fonts npm package version 35.4.8 includes a malicious loader script (_loader.js) that dynamically reconstructs C2 hostnames using split-string arrays and DNS TXT record fallback channels. It downloads an opaque, unverified platform-specific binary to a temporary directory under a hidden or decoy filename, sets executable permissions, and spawns the binary detached via shell commands. The package also contains a telemetry module with similar dropper capabilities. This design enables attacker-controlled code execution on any system that installs or requires this package.
Potential Impact
Installing or requiring dolyame-boxy-fonts version 35.4.8 results in arbitrary code execution on the host system. The malicious binary is downloaded and executed without integrity checks, potentially allowing attackers to run any code with the privileges of the user installing the package. This compromises system security and can lead to further malicious activities.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should avoid installing or requiring dolyame-boxy-fonts version 35.4.8. Verify the integrity and provenance of npm packages before installation. Monitor for updates or advisories from the package maintainers or npm registry regarding this issue. Patch status is not yet confirmed — check the vendor advisory or npm security advisories for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-13311
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a738531bf8831d5394f0713
Added to database: 08/05/2026, 18:47:13 UTC
Last enriched: 08/05/2026, 21:17:08 UTC
Last updated: 09/18/2026, 02:18:42 UTC
Views: 19
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