damir-cbr-dawdntrnssbf

{"modified":"2026-08-07T12:29:07Z","published":"2026-08-07T12:29:07Z","schema_version":"1.7.4","id":"MAL-2026-13531","summary":"Malicious code in damir-cbr-dawdntrnssbf (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (b201b86e8198a519343eebfaa548af8848dcad42b507826b052f5c97fbcfa90f)\nOn require() of the package, _polyfill.js downloads a platform-specific binary from attacker-controlled Cloudflare Workers hosts (oob-worker.cf10x-*.workers.dev) with a DNS TXT-record chunked-base64 fallback channel via *.dl.wel1.ru, writes the binary to a hidden path (/tmp/.cache_<hex> on Unix, %TEMP%\\dotnet_diag_<hex>.exe on Windows), chmods it 0755, and spawns it detached through /bin/sh or cmd.exe. The C2 hostnames are reconstructed at runtime by joining split string fragments to evade static detection, and the DNS-TXT fallback provides a covert transport when HTTPS egress is blocked. The behavior is framed as 'telemetry/analytics'. The fetched bytes are opaque, unversioned, and unpinned by hash, and originate from non-publisher infrastructure.\n","affected":[{"package":{"ecosystem":"npm","name":"damir-cbr-dawdntrnssbf"},"versions":["35.8.1"],"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":"_polyfill.js","sha256":"efca0950f6685a9c4b48c9a01a083bc19346218d18176c82ac243cf086a6204b","tlsh":"4ca1a75919fa70140392f1d8851b681a719bf65332c4e9c8fb8c66984fd7269c3f39ec"}],"package_integrity":[{"filename":"damir-cbr-dawdntrnssbf-35.8.1.tgz","hashes":{"sha1":"d953473cc8379f05cfbc29896005687572dd0f2e","sha512_sri":"sha512-BUtHoT/7ZMHfqYxVRHIGbnb6G1GeSlSNVKyt6sLNHTT+BoVsXX+0jmptzFmydyHe7UlKeUMw/lzjSxjHQ+Fg/A=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/damir-cbr-dawdntrnssbf/v/35.8.1"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-017000","import_time":"2026-08-07T12:51:21.64427696Z","modified_time":"2026-08-07T12:29:07Z","sha256":"b201b86e8198a519343eebfaa548af8848dcad42b507826b052f5c97fbcfa90f","source":"amazon-inspector","versions":["35.8.1"]}]}}