Malware
SlipScreen
According to Proofpoint, SlipScreen is a first stage loader and has variants written in Rust and in C++.
SlipScreen is a Windows malware family operated by RomCom.
Background
Proofpoint describes SlipScreen as a first-stage loader that exists in both Rust and C++ variants. Because its crypter is refreshed for every campaign, static detection proves difficult.
Source: Malpedia (Fraunhofer FKIE).