{"id":"MAL-2026-6779","summary":"Malicious code in @marketfront/fingerprint (npm)","details":"The @marketfront/fingerprint package is part of a 25-package malicious campaign batch-published to the @marketfront npm scope by npm user 'marketfront' (marketfront@tutamail.com) within a roughly 3-minute window on 2026-07-01. All packages in the campaign were published at version 7.0.0 and use e-commerce/marketing frontend component names as cover.\n\nThe package declares a postinstall hook (node scripts/postinstall.js) that executes heavily obfuscated (obfuscator.io-style) code automatically at npm install time. Static analysis of the decoded payload revealed a credential harvester that dynamically requires fs, os, http, https, zlib, path and dns, then reads approximately 20 sensitive credential files including ~/.ssh, ~/.aws/credentials, ~/.kube/config, ~/.docker/config.json, ~/.npmrc, ~/.netrc, ~/.pgpass, ~/.git-credentials, ~/.env and ~/.bash_history. Collected data is exfiltrated via a gzip-compressed HTTPS POST with a custom X-Secret header to the path /api/v1/events, alongside a DNS resolver beacon. The command-and-control host is concealed behind an additional RC4+XOR encryption layer around an embedded configuration blob and was not statically resolved.\n\nThe decoded behavioral payload (module requires, credential-file target list, exfiltration headers and endpoint) is byte-for-byte identical across sampled packages in the campaign. The campaign shares tooling and infrastructure patterns (obfuscated postinstall credential harvester, X-Secret header, /api/v1/events exfiltration path, RC4-concealed C2) with the earlier @emcd-vue campaign, indicating the same actor rotating scopes and disposable maintainer emails.","modified":"2026-07-05T22:46:43.556932387Z","published":"2026-07-02T00:00:00Z","database_specific":{"malicious-packages-origins":null},"references":[{"type":"REPORT","url":"https://safedep.io/marketfront-dependency-confusion-campaign/"}],"affected":[{"package":{"name":"@marketfront/fingerprint","ecosystem":"npm","purl":"pkg:npm/%40marketfront%2Ffingerprint"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@marketfront/fingerprint/MAL-2026-6779.json"}}],"schema_version":"1.7.5","credits":[{"name":"SafeDep","contact":["https://safedep.io"],"type":"FINDER"}]}