tyepescript-core

{"modified":"2026-08-18T23:20:15Z","published":"2026-08-18T23:20:15Z","schema_version":"1.7.4","id":"MAL-2026-14144","summary":"Malicious code in tyepescript-core (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (f2ba91f9b227b017ddbfa6a908a0a8f0263292a0af2c11aeef0ccd24b2894862)\nPackage name 'tyepescript-core' is a typosquat of 'typescript'; the module itself exports an empty stub. scripts/postinstall.js XOR-decodes byte arrays (key 'stf2026') to reconstruct a download URL and shell command at runtime, fetches an opaque Windows binary to %TEMP%\\main.exe, and spawns it detached with stdio ignored. On WSL/virtualized-Linux hosts, a second XOR-decoded 'bridge' command is passed to child_process.exec to reach the Windows host. The same postinstall also POSTs a JSON body containing the resolved platform label to http://193.70.34.101:20099/vote, with the bare-IP host assembled at runtime from a string array to hide the literal. Result: arbitrary attacker-controlled code execution on the installer's machine at 'npm install' time, plus an install beacon to attacker infrastructure.\n","affected":[{"package":{"ecosystem":"npm","name":"tyepescript-core"},"versions":["1.0.0"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"scripts/postinstall.js","sha256":"617f03b1e6eb471e65fb1ab58c78c2098903ed9072ffa292ada31fb28292dd35","tlsh":"53d13fc61ef59035874bf96884cf9d13b2a6c207330e4a65ff8f42107f5792c85a69ea"}],"package_integrity":[{"filename":"tyepescript-core-1.0.0.tgz","hashes":{"sha1":"3166b20b839b68c427152782caad9a72c7244af2","sha512_sri":"sha512-tlm7FQimKWA3Car4p7JrLo75Q9iju+jVai1lPwDPymyJchG6SmanS6aeqF1/fgrEaBoTGB0GjNDkXLu1TCqc1w=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/tyepescript-core/v/1.0.0"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-018184","import_time":"2026-08-18T23:41:21.888156981Z","modified_time":"2026-08-18T23:20:15Z","sha256":"f2ba91f9b227b017ddbfa6a908a0a8f0263292a0af2c11aeef0ccd24b2894862","source":"amazon-inspector","versions":["1.0.0"]}]}}