LWA-2026-7521 MAL-2026-12228 ↗ confirmed malware

tinkoff-boxy-desktop-icons-horizontal@20.1.8

Malicious code in tinkoff-boxy-desktop-icons-horizontal (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1573 · Encrypted ChannelT1082 · System Information DiscoveryT1041 · Exfiltration Over C2 Channel

Analysis

On require(), the package fingerprints the host OS and architecture (linux/x64, darwin/arm64, win32/x64, etc.) and downloads a platform-specific binary from Cloudflare Workers C2 infrastructure (oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) via HTTPS GET to paths like /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the HTTPS download fails, it falls back to a DNS TXT-based chunked download from *.dl[.]well1[.]site domains. The downloaded binary is written to /var/tmp/.cache_<random> (Linux/macOS) or %TEMP%\dotnet_diag_<random>.exe (Windows) and executed as a detached background process. A cache marker file prevents re-download for approximately 6.3 hours.

analyzed by
Leitwacht
first seen
Aug 2, 2026, 04:27 PM
analyzed
Aug 2, 2026, 04:29 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.