{"id":"MAL-2026-6764","summary":"Malicious code in @marketfront/advertisingdevtool (npm)","details":"The @marketfront/advertisingdevtool 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 (6192642b09b16f0753d464d540aba9f3a6bc7946755d5aa8727889e6434e8774)\nThe package declares postinstall: node scripts/postinstall.js and ships a 166KB obfuscator.io-style bundle (string-array, RC4-decoded literals) that runs automatically on npm install. On execution it (1) collects host reconnaissance — OS hostname/arch/platform/type/release/version, os.userInfo(), CPU info, network interfaces, npm_config_user_agent, and Windows-specific USERDOMAIN, COMPUTERNAME, PROCESSOR_ARCHITECTURE, APPDATA, LOCALAPPDATA, TEMP, PROGRAMDATA — and dumps process.env in full (CI tokens, AWS_*, GITHUB_TOKEN, and similar secrets); (2) scans the user's home directory (paths derived from os.homedir() including.aws,.ssh,.npmrc,.config, and browser profile directories) via fs.readdirSync + fs.readFileSync and packs their contents into the payload; (3) encrypts the payload and exfiltrates over two parallel channels — DNS-tunnel using dns.Resolver.resolve4() with base32-encoded XOR/RC4-encrypted chunks embedded as subdomain labels (bypasses HTTP egress filtering) and an HTTPS POST fallback with the same encrypted body; and (4) gates the entire payload behind an anti-analysis IIFE that inspects process.execArgv and process.env.NODE_OPTIONS for --inspect/--inspect-brk and runs a wall-clock timing loop to detect debugging, aborting on non-clean hosts. The package presents itself as an 'Internal configuration loader with env, vault and remote config support' and points at nonexistent internal infrastructure (github.marketfront.io, npm.marketfront.io, jira.marketfront.io) — the classic dependency-confusion cover story targeting organizations that may have a private @marketfront scope.\n","modified":"2026-07-06T05:16:47.498929524Z","published":"2026-07-02T00:00:00Z","database_specific":{"malicious-packages-origins":[{"import_time":"2026-07-06T04:58:10.330056236Z","modified_time":"2026-07-06T03:19:10Z","source":"amazon-inspector","id":"IN-MAL-2026-008018","sha256":"6192642b09b16f0753d464d540aba9f3a6bc7946755d5aa8727889e6434e8774","versions":["7.0.0"]}]},"references":[{"type":"REPORT","url":"https://safedep.io/marketfront-dependency-confusion-campaign/"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/@marketfront/advertisingdevtool/v/7.0.0"}],"affected":[{"package":{"name":"@marketfront/advertisingdevtool","ecosystem":"npm","purl":"pkg:npm/%40marketfront%2Fadvertisingdevtool"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"versions":["7.0.0"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@marketfront/advertisingdevtool/MAL-2026-6764.json","indicators":{"evidence_files":[{"tlsh":"9bf3db892740d447d85fdfbf7f61e6f4e11abcc6c3c1284af714b96ce89852a9a48780","sha256":"7facbd019227ec4019eb7f2f3eb8b601315b5f3046c4458d5f3b0e41ab67bb65","path":"scripts/postinstall.js"},{"tlsh":"6011cc31c929cd3322d5259afd741e46ba3a1a9f0889fc1da2c3102c0bcd2a660fd77d","sha256":"340b753aefe1104f5e40ddb5910e795efa8730809fe128d8824c9efcbe326047","path":"package.json"}],"package_integrity":[{"filename":"advertisingdevtool-7.0.0.tgz","hashes":{"sha512_sri":"sha512-ALTQ+spWt341TunNDvZqYn7iSNr5cRma9v1LWBMi9XuWvshxnM/e1i93X3oPyUYXN9cBk0zniNpPEb+st9Vu+Q==","sha1":"8505776a2ca01f78ccddcd7de5f787d4d2024f2a"}}]},"cwes":[{"cweId":"CWE-506","name":"Embedded Malicious Code","description":"The product contains code that appears to be malicious in nature."},{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","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"}]}