@rentwise/common@1.0.36

build/index.js appends an eval(atob(...)) blob to the legitimate common-library exports, so the payload runs whenever any consumer require()s @rentwise/common. The decoded payload queries public Ethereum JSON-RPC nodes and eth.blockscout.com/api to fetch the latest transaction sent by the hardcoded wallet 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a, reconstructs an IPv4 address from the transaction's tx.to field (bytes 0-3 as octets), then HTTP GETs http://<ip>:443/0x/cls and http://<ip>:443/0x/ls. The response body is XOR-decoded using the x-payload-b64 header, eval()'d in-process, and additionally spawned as a detached `node -e <payload>` child process with stdio:ignore and windowsHide. All strings (module names http/https/zlib/child_process, URLs, RPC method names) are \uXXXX-escaped inside the base64 blob to defeat static string matching. The blockchain-anchored C2 (EtherHiding pattern) lets the operator rotate infrastructure by broadcasting a new on-chain transaction. This grants arbitrary remote code execution on any host that installs and loads the package.