{"id":"MAL-2026-17197","title":"Malicious code in coinscan (PyPI)","summary":"Malicious code in coinscan (PyPI)","severity":"critical","exploited":true,"vendor":"coinscan","product":"coinscan","ecosystem":"pip","affected":["coinscan"],"published":"2026-09-27","updated":"2026-09-27","sourceUpdated":"2026-09-27T14:30:14.813620703Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/MAL-2026-17197","references":[{"url":"https://www.virustotal.com/gui/file/d03c42c275f0dbc617428441508c49ae1adcbbc95af4eeb094bca4e4f8943f3e/detection"},{"url":"https://polygonscan.com/address/0x9c0a507300fd902787bb193d80fca5ce6e1bff9a"},{"url":"https://bad-packages.kam193.eu/pypi/package/coinscan"},{"url":"https://pypi.org/project/coinscan/0.1.0/"}],"tags":["osv","pip","malware"],"ingestedAt":"2026-09-28T07:19:56.091Z","slug":"MAL-2026-17197","body":"## Overview\n\n\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\n\n## Affected packages\n\n- `coinscan`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"abyssal","depthScore":70,"depthScoreParts":{"impact":52.3,"likelihood":0,"exploitation":18,"ransomware":0},"changes":[]}