{"id":"MAL-2026-6787","summary":"Malicious code in @marketfront/navbar (npm)","details":"The @marketfront/navbar 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.\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (2a0a9490d91761fdf242bf7e3b9a97cc4f0df29f1306d7e476dad08aad25c17a)\nThe package registers scripts/postinstall.js as an npm postinstall hook. The script is heavily obfuscated (obfuscator.io-style string-array with RC4 decoder, hex-named functions, runtime string decoding) and, on npm install, harvests a full profile of the installing machine: os.hostname(), os.userInfo().username, os.homedir(), os.platform(), os.arch(), os.networkInterfaces(), process.argv0, process.cwd(), the complete process.env, npm_config_user_agent, and Windows-specific USERDOMAIN, COMPUTERNAME, APPDATA, LOCALAPPDATA, TEMP, and PROGRAMDATA, along with the package name and version. The collected data is JSON-serialized, zlib-compressed, XOR-encrypted, and exfiltrated over two channels to a runtime-decoded remote host: an HTTPS POST and a DNS TXT tunnel that chunks the payload into subdomain labels via a custom dns.Resolver with attacker-specified servers. Payload execution is gated by anti-analysis checks — inspection of process.argv and NODE_OPTIONS for 'node_modules' / '.npm' tokens, a Date.now() timing threshold, and a global sentinel for single execution — designed to fire on real developer and CI installs while staying silent under scanners. The package presents itself as an 'Internal structured logger' under the name @marketfront/navbar, but has no working library surface: dist/index.js re-exports../src/index.js, which is not shipped in the tarball. The entire functional behavior is the install-time stealer. Developer and CI process environments routinely contain cloud provider tokens, npm publish tokens, registry credentials, and CI secrets, so the impact is credential compromise of the installer's account/infrastructure.\n","modified":"2026-07-06T05:16:46.763204305Z","published":"2026-07-02T00:00:00Z","database_specific":{"malicious-packages-origins":[{"versions":["7.0.0"],"source":"amazon-inspector","modified_time":"2026-07-06T03:21:37Z","import_time":"2026-07-06T04:58:11.100821248Z","sha256":"2a0a9490d91761fdf242bf7e3b9a97cc4f0df29f1306d7e476dad08aad25c17a","id":"IN-MAL-2026-008035"}]},"references":[{"type":"REPORT","url":"https://safedep.io/marketfront-dependency-confusion-campaign/"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/@marketfront/navbar/v/7.0.0"}],"affected":[{"package":{"name":"@marketfront/navbar","ecosystem":"npm","purl":"pkg:npm/%40marketfront%2Fnavbar"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"versions":["7.0.0"],"database_specific":{"indicators":{"evidence_files":[{"sha256":"0fbc5fed44589787d688a4a9c1b398db09c301c6fed388d97a1bbc862db31d99","path":"scripts/postinstall.js","tlsh":"7ef3db892740d453d85fdeffbf61e6f4e1197cc6c3c1284af714b86ce89852a9a48b81"},{"sha256":"886ca007a5e6dfde3ca2139a1d3e3732b0f46eb3bfcc12451cdbea1e80c5848c","path":"package.json","tlsh":"4511eb31c6369c3372d4219abdb41e02b8364daf0889fc1963c3412c0b8d1ab10fda3d"}],"package_integrity":[{"filename":"navbar-7.0.0.tgz","hashes":{"sha1":"b38d6d07886b08f13c1d522c667a06f8cbcc6406","sha512_sri":"sha512-8IEM004fWJ1otz7mxF665ONKA1frOqOF27qvM6bQ1w5ZQija+9RTbBxHP3g5wwA4B7LiwcJ4N4Rji4odU8TKkQ=="}}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@marketfront/navbar/MAL-2026-6787.json","cwes":[{"description":"The product contains code that appears to be malicious in nature.","cweId":"CWE-506","name":"Embedded Malicious Code"},{"description":"The product contains code that appears to be malicious in nature.","cweId":"CWE-506","name":"Embedded Malicious Code"}]}}],"schema_version":"1.7.5","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"},{"name":"SafeDep","contact":["https://safedep.io"],"type":"FINDER"}]}