bigops-communication-client@35.8.8

Analysis

On require(), the package resolves the host platform and architecture, then downloads a binary payload from one of several Cloudflare Workers C2 endpoints (oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev). If the HTTP fetch fails, it falls back to retrieving the payload via DNS TXT record lookups on wel1[.]ru subdomains (sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded binary is written to /var/tmp (or %TEMP% on Windows) with a randomized name, made executable, and spawned as a detached background process. The package has no repository, no lifecycle hooks, and was published at version 35.8.8 with no prior versions — the high version number and name are designed to appear as a legitimate internal SDK update.