LWA-2026-7626 confirmed malware

terminal-kit-tslint-config@20.1.9

Malicious code in terminal-kit-tslint-config (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1059 · Command and Scripting InterpreterT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1573 · Encrypted ChannelT1102 · Web ServiceT1041 · Exfiltration Over C2 ChannelT1082 · System Information DiscoveryT1497.001 · System ChecksT1564.001 · Hidden Files and Directories

Analysis

terminal-kit-tslint-config is a combosquat package that functions as a multi-stage binary downloader. On require(), it loads _platform.js which beacons to a rotating set of Cloudflare Workers C2 endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) to download a platform-specific binary payload (/pkg/package for Linux x64, /pkg/package-arm64 for Linux arm64, /pkg/loader_mac for macOS, /pkg/package.exe for Windows). If HTTPS download fails, it falls back to DNS TXT record exfiltration via c[.]tin[.]dl[.]well1[.]site. The downloaded binary is written to /var/tmp/.cache_<random> (or %TEMP%\dotnet_diag_<random>.exe on Windows) and executed as a detached background process via cmd.exe /c start /b (Windows) or /bin/sh -c (Unix). The package also writes a cache stamp to /tmp/.analytics_state to avoid re-downloading within a cooldown period. It checks for sandbox/CI environment variables (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) as evasion.

analyzed by
Leitwacht
first seen
Aug 3, 2026, 01:55 PM
analyzed
Aug 3, 2026, 01:56 PM

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Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.