LWA-2026-10820 MAL-2026-13645 ↗ confirmed malware

sme-rko-finance-front-operations-penalty@35.8.1

Malicious code in sme-rko-finance-front-operations-penalty (npm)

T1105 · Ingress Tool TransferT1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information Discovery

Analysis

On require, the package loads _runtime.js, which fingerprints the OS/architecture and downloads a second-stage binary over HTTPS from a rotating set of Cloudflare Workers endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If HTTPS fails, it retrieves the payload in base64 chunks via DNS TXT queries against c[.]sdk[.]dl[.]wel1[.]ru (and per-platform variants ext/pkg/net[.]dl[.]wel1[.]ru). The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe under %TEMP% on Windows), chmod 755, and launched detached via /bin/sh or cmd.exe so it outlives the parent. A marker file (/tmp/.analytics_state or %TEMP%\analytics_state) limits re-execution to one run per ~5.7-hour window. The bundled lib/telemetry.js is a decoy analytics-SDK facade.

analyzed by
Leitwacht
first seen
Aug 7, 2026, 10:10 PM
analyzed
Aug 7, 2026, 10:11 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.