{"id":"MAL-2026-17197","summary":"Malicious code in coinscan (PyPI)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (021da2d8a1de0971203de68e083eeb30efc18b58ebc5b36ecde89eb03b02cf9e)\nsetup.py imports coinscan.telemetry and calls check() during install. check() fetches a JSON manifest from https://thisisafalsepositive.st/cdn/v2/coinscan/manifest.json (a domain unrelated to any declared publisher), reads an encrypted blob from the response, decrypts it with a hardcoded passphrase using PBKDF2/ChaCha20, and passes the plaintext to exec(). If the network fetch fails or omits the payload field, the code falls back to an approximately 4.4KB base64 blob shipped in coinscan/_payload.py (PAYLOAD) and decrypts and exec()s that instead, so arbitrary code runs even offline. Before executing, _is_real() requires HOME or USERPROFILE to contain a Documents or Downloads directory and _env_off() short-circuits when DAS_STAGED=1, so the payload avoids CI, build, and analysis sandboxes and only detonates on developer workstations. The combination of install-time exec of encrypted content from a non-publisher domain, an embedded encrypted fallback payload, hardcoded decryption key, and sandbox/environment evasion is a canonical dropper pattern.\n\n## Source: kam193 (d403e54ce25ec07ec9979ba880af4930ded34a3702e9829c69a8e67279c26d59)\nDuring installation, obfuscated code is used to fetch code hidden in an image containing a Python application with a native extension module. This module holds an obfuscated infostealer which collects sensitive data and exfiltrates them to a C2 server retrieved from transaction history in the Polygon blockchain.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-09-donutautosellsrc\n\n\nReasons (based on the campaign):\n\n\n - infostealer\n\n\n - Downloads and executes a remote executable.\n\n\n - obfuscation\n\n\n - malware\n\n\n - native-extension\n\n\n - steganography\n\n\n - c2-in-blockchain\n\n\n - The package contains code to detect if it is running in a sandbox environment.\n","modified":"2026-09-27T14:30:14.813620703Z","published":"2026-09-27T09:37:17Z","database_specific":{"iocs":{"domains":["thisisafalsepositive.st","sltnnt.ru"],"urls":["https://thisisafalsepositive.st/cdn/v2/9f4e7a2c1b8d.png","https://thisisafalsepositive.st/cdn/v2/promotion/manifest.json"]},"malicious-packages-origins":[{"modified_time":"2026-09-27T09:37:17.279764Z","sha256":"d403e54ce25ec07ec9979ba880af4930ded34a3702e9829c69a8e67279c26d59","source":"kam193","versions":["0.1.0"],"id":"pypi/2026-09-donutautosellsrc/coinscan","import_time":"2026-09-27T09:41:13.714585351Z"},{"versions":["0.1.0"],"id":"IN-MAL-2026-020569","import_time":"2026-09-27T14:16:28.365183819Z","modified_time":"2026-09-27T13:44:13Z","sha256":"021da2d8a1de0971203de68e083eeb30efc18b58ebc5b36ecde89eb03b02cf9e","source":"amazon-inspector"}]},"references":[{"type":"EVIDENCE","url":"https://www.virustotal.com/gui/file/d03c42c275f0dbc617428441508c49ae1adcbbc95af4eeb094bca4e4f8943f3e/detection"},{"type":"WEB","url":"https://polygonscan.com/address/0x9c0a507300fd902787bb193d80fca5ce6e1bff9a"},{"type":"WEB","url":"https://bad-packages.kam193.eu/pypi/package/coinscan"},{"type":"PACKAGE","url":"https://pypi.org/project/coinscan/0.1.0/"}],"affected":[{"package":{"name":"coinscan","ecosystem":"PyPI","purl":"pkg:pypi/coinscan"},"versions":["0.1.0"],"database_specific":{"cwes":[{"name":"Embedded Malicious Code","cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature."}],"indicators":{"evidence_files":[{"sha256":"503e08ff154c13b54289378feeeb23bbadeca19367403f8a3f12cf8e26bcb532","tlsh":"0d5171f5eb4a6423d242d2558825d0a4932abd2b7e536a307ccc63285f9207382b368d","path":"coinscan/telemetry.py"},{"tlsh":"81c17d55487c247ceaa150d3638adc5742d2e93dc3c549aeef4f6f9a32147c16b43b11","path":"coinscan/_payload.py","sha256":"9b3e07a6027c4f8caae6a1024fe3d698c4f92295c095e5781198cb465828a14e"}],"package_integrity":[{"hashes":{"blake2b_256":"33a827c9c6a4631a5e02e0d42aaf68f34363255f52b5a694ff5d5a4bfa67142a","md5":"9ae156f067f3079d99d981fec362029f","sha256":"4dd9521839c85b4751b8d828a209d50709060802ed44ef1cdc742f67efc5c56d"},"filename":"coinscan-0.1.0.tar.gz"}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/coinscan/MAL-2026-17197.json"}}],"schema_version":"1.9.0","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"},{"name":"Kamil Mańkowski (kam193)","contact":["https://github.com/kam193","https://bad-packages.kam193.eu/"],"type":"REPORTER"}]}