AV-Evasion

C and Rust binaries carry compiler fingerprints that cannot be removed: GCC function prologues, LLVM unwind tables, CRT startup code, stack canary patterns, .eh_frame sections. Pure assembly has none of these. Empirical test on live x64 C2 implant: 0/65 static detections on VirusTotal, SROP kernel-mediated execution and process_vm_writev (syscall 311) invisible to behavioral sandbox, only entry-phase ptrace caught. CMOV branch-free execution collapses CFG to a single basic block — confirmed effective by SEBD 2019 academic research.

Uncompressed C2 payloads have two problems: size triggers bandwidth anomalies, and high-entropy raw shellcode scores above 7.5 on entropy analysis tools. VESQER addresses both: DPCM computes per-byte deltas (reducing entropy by exploiting local correlation), RLE collapses repeated delta values (reducing size on structured shellcode). Pure x64 Assembly, zero libc, zero dependencies. Complete implementation walkthrough: delta computation, run-length encoding loop, decode stub design, and measured compression ratios on real C2 payloads.