tyepescript-cli

{"modified":"2026-08-18T23:19:37Z","published":"2026-08-18T23:19:37Z","schema_version":"1.7.4","id":"MAL-2026-14143","summary":"Malicious code in tyepescript-cli (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (8a867a5fc578cb6dcb759370e837d1a4c7e24f6db63c0c0f781e2c24995905e6)\ntyepescript-cli is a typosquat of `typescript`. Its `scripts/postinstall.js` XOR-decodes (key `stf2026`) a set of obfuscated byte arrays that resolve to an attacker-controlled URL, a PowerShell bridge command, and script fragments. On Windows, the postinstall downloads `main.exe` from `github.com/bebrazi/qPbM50V1AKG0rVlH/releases/download/null/main.exe` to `%TEMP%\\main.exe` and spawns it detached. Under WSL, it decodes a `powershell.exe` bridge command and execs it via `child_process.exec` with `windowsHide: true` to fetch and run the same binary on the Windows host from the Linux install context. Before the drop, the script POSTs a JSON body with a host label to a hardcoded numeric IP `http://193.70.34.101:20099/vote` (host built by joining the array `['193','70','34','101']` to hide the literal) as an install-time beacon. The mutable `releases/download/null/` path on an anonymous personal GitHub account (`bebrazi`) is unrelated to any legitimate `typescript` publisher, and the XOR obfuscation of URLs and commands has no benign purpose in an npm install script.\n","affected":[{"package":{"ecosystem":"npm","name":"tyepescript-cli"},"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":"b411176fb75b99b3fbf80915fca95ad643d567117e86e3a99813cb0958a1181f","tlsh":"2bd13fca1ef59035874bf96884cf9d13b2a6c207320d4a65ff8f42107f5793c85a69e9"}],"package_integrity":[{"filename":"tyepescript-cli-1.0.0.tgz","hashes":{"sha1":"a9331be045034272dedb7fa3fd051dd1b006dbda","sha512_sri":"sha512-7K3/w3Qok3uyL6XzINa4NLHPa5F5V/EFGpMJkzL/h41STsSshUTlQ3G/Dx+LPjgrCtpmtJQjgDrOFY6JP4N3FA=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/tyepescript-cli/v/1.0.0"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-018180","import_time":"2026-08-18T23:41:21.450977689Z","modified_time":"2026-08-18T23:19:37Z","sha256":"8a867a5fc578cb6dcb759370e837d1a4c7e24f6db63c0c0f781e2c24995905e6","source":"amazon-inspector","versions":["1.0.0"]}]}}