Rust Reqwest Library Default User-Agent

Tim Peck@timpeck

•updated Jan 9, 2026•5•0•119

Detects outbound network traffic with a User-Agent header indicating the use of the Rust 'reqwest' HTTP client library. This User-Agent is used by the RustyWater implant, associated with the MuddyWater APT group, for command and control (C2) communications.