Solving the 7777 Botnet enigma: A cybersecurity quest

Sekoia.io investigated the Quad7 (7777) botnet and confirmed compromised TP‑Link routers running a simple bind shell (xlogin) and a SOCKS5 proxy used to relay slow password spraying attacks against Microsoft 365, likely in support of business email compromise. The report provides captured malware hashes, infrastructure IPs, YARA and Sigma rules for detection, forensic methodology, and mitigation guidance, while noting attribution and the exact exploit chain remain unresolved.