{"id":"MAL-2026-6769","summary":"Malicious code in @marketfront/captchaservice (npm)","details":"The @marketfront/captchaservice 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 (8cd0b252facfe0d6e08c857f30067c00ba09b8423773b1181d6ce78ebba8b749)\nPackage @marketfront/captchaservice@7.0.0 could not be fully characterized from automated evidence. No a static rule findings are recorded, and while automated code tracing engaged and read files from the package, its output was withheld by the provider's malware-content safety filter — a signal that the traced content resembled operational malware but which does not, on its own, identify a specific installer-harm mechanism (exfil endpoint, credential path, dropper URL, backdoor). Without a named data source, named destination, or named install/import-time execution path, the record does not meet the bar for a public block verdict. The scope (`@marketfront`) and package name (`captchaservice`) do not correspond to a known-legitimate widely-used package family, and the safety-filter trigger warrants a human look at the tarball contents before this version is trusted in a build pipeline.\n","modified":"2026-07-09T22:17:04.802384319Z","published":"2026-07-02T00:00:00Z","database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-009435","import_time":"2026-07-09T22:02:31.262215491Z","sha256":"8cd0b252facfe0d6e08c857f30067c00ba09b8423773b1181d6ce78ebba8b749","source":"amazon-inspector","versions":["7.0.0"],"modified_time":"2026-07-09T21:55:27Z"}]},"references":[{"type":"REPORT","url":"https://safedep.io/marketfront-dependency-confusion-campaign/"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/@marketfront/captchaservice/v/7.0.0"}],"affected":[{"package":{"name":"@marketfront/captchaservice","ecosystem":"npm","purl":"pkg:npm/%40marketfront/captchaservice"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"versions":["7.0.0"],"database_specific":{"cwes":[{"name":"Embedded Malicious Code","cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature."},{"name":"Embedded Malicious Code","cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature."}],"indicators":{"package_integrity":[{"filename":"captchaservice-7.0.0.tgz","hashes":{"sha512_sri":"sha512-yXMx5wZcsdrbh7Emv8hIBTN3XT0R+oGY+QQhEx/OrYz6AMXOhM04Jnf6uZGfh5wEkzGBcx1oRlOspyLM8Mp8oA==","sha1":"7b051bad91b66c1ac615e474d6323d4609afef9e"}}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@marketfront/captchaservice/MAL-2026-6769.json"}}],"schema_version":"1.7.5","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"},{"name":"SafeDep","contact":["https://safedep.io"],"type":"FINDER"}]}