LWA-2026-10289 MAL-2026-13205 ↗ confirmed malware

eacq-acq-menu@35.2.1

Malicious code in eacq-acq-menu (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1059 · Command and Scripting InterpreterT1082 · System Information Discovery

Analysis

On require(), the package runs a hidden adapter that downloads and executes a platform-specific binary. It fingerprints the OS/arch, then fetches a payload over HTTPS from rotating Cloudflare Workers endpoints (oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe. If those fail it falls back to a DNS TXT-record channel via c[.]sdk[.]dl[.]wel1[.]ru (and sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in TEMP on Windows), made executable, and launched as a detached background process via cmd.exe /c start /b or /bin/sh -c. A marker file (.analytics_state / analytics_state) throttles repeat execution. The package also ships an 81KB decoy analytics-SDK module.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 02:58 PM
analyzed
Aug 5, 2026, 03:20 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.