FTP banner abuse used to deliver new Windows RATs E4del and PINHOLE

Fri, 21 Aug 2026 11:38:25 +0000

Engineer — Learn: Novel delivery technique hiding commands inside FTP server banners is worth understanding for FTP-exposed environments, but no KEV/PoC/EPSS signals exist to force immediate action — review whether any internal FTP services expose banners to untrusted clients.
SOC/IR — Plan: Two undocumented RATs with an unusual delivery vector warrant new detection logic; build rules to flag anomalous FTP banner content and hunt for E4del/PINHOLE behavioral patterns (process spawning from FTP client sessions) once IOCs are published.
Leader — Skip

Ftp on CuraSec