Rust's Performance and Stealth Advantages Make It a Growing Malware Development Tool

Bishop Fox Senior Security Consultant Nick Cerne has published a detailed technical breakdown of Rust as a malware development platform, arguing that the language's binary characteristics and resistance to automated analysis give threat actors meaningful operational advantages over traditional C and C++ tooling.

The core finding is counterintuitive to anyone who thinks smaller equals sneakier. Rust binaries are significantly larger than their C and C++ equivalents, and that bulk works in an attacker's favor. When Cerne compared functionally identical shellcode loaders, the Rust version measured 151.5 KB against just 71.7 KB for the C version. That extra weight translates directly into reverse engineering complexity, forcing analysts to wade through substantially more code to reconstruct intent.

The size problem compounds when automated tools enter the picture. Automated malware analysis platforms produce more false positives and negatives when processing Rust-compiled samples, and standard reverse engineering tools including Ghidra and IDA Free struggle to disassemble Rust binaries compared to C and C++ counterparts. For defenders relying on signature-based detection, the picture is similarly difficult: improved evasion of signature-based detection mechanisms is cited alongside reverse engineering difficulty as one of the two primary reasons Rust, Go, and Nim have grown in popularity among malware authors.

Cerne's research draws on a 2023 study from the Rochester Institute of Technology that confirmed several technical advantages of Rust for malware development, lending academic weight to what the security community has been observing operationally.

Bishop Fox has since updated the blog with a podcast component. Cerne appeared on CyberWire's Research Saturday to discuss his findings in episode 373, titled "Crafting malware with modern metals," where the conversation focused on the nuances of using Rust to create evasive malware tooling and the challenges it presents for reverse engineering.

The Bishop Fox piece has circulated widely within cybersecurity circles, arriving amid broader concerns about Rust's presence in supply chain attack vectors. The dual-use framing is deliberate: the same properties that make Rust attractive for safe, performant systems programming are precisely what complicate malware analysis. As the research concludes, security solutions and malware development are locked in a cat-and-mouse dynamic requiring constant refinement, with Rust currently offering compelling advantages to those building evasive tooling. For the defenders maintaining EDR pipelines and reverse engineering workflows, the implication is clear: analysis tooling built around C and C++ assumptions is operating with a widening blind spot.