Golang Beacons and VS Code Tunnels: Tracking a Cobalt Strike Server Leveraging Trusted Infrastructure

Hunt.io finds Cobalt Strike 4.10 team servers carrying a rare watermark (688983459) seen on only five other IPs, with brand-impersonating domains suggesting phishing-focused operations.

Hunt profiles SparkRAT, the Go-based RAT behind attacks tracked by Microsoft and AhnLab, with detection tips for its default port 8000 and login-page fingerprints.

While hunting IOX copies, Hunt found an open directory holding two SuperShell/GOREVERSE payloads and a Linux ELF Cobalt Strike beacon, and shows how /supershell/login panels can be tracked.

A Hunt how-to on detecting RedGuard, the open-source C2 redirector built with Cobalt Strike in mind, explaining how redirectors obscure real C2 servers and how defenders can find their infrastructure.

Hunt explains how it identifies, tracks and 'burns' malicious C2 servers using TLS certificates, HTTP headers, SSH keys, JARM/JA4x hashes and TCP banners, seen in Gh0st and ShadowPad cases.

Hunt announces its C2 Feed, covering how the team identifies and tracks malicious command-and-control servers and packages this intelligence to help defenders block adversary infrastructure.