https://xchg-rax-rax.github.io/the %rax exchangeVulnerability research, malware reverse engineering, and low-level systems notes by Lewis Patten. 2026-05-19T16:42:51+00:00 Lewis Patten https://xchg-rax-rax.github.io/ Jekyll © 2026 Lewis Patten /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 5 Vulnerabilities in Dozens of Models of AvTech Devices2025-10-13T09:30:00+00:00 2025-10-13T09:30:00+00:00 https://xchg-rax-rax.github.io/posts/avtech_vulnerabilites/ Lewis Patten Five novel vulnerabilities (4 post-auth RCE, 1 XSS) discovered across dozens of AvTech camera and DVR models — CVE-2025-57198 through CVE-2025-57202. Whispergate Stage 12022-04-24T19:32:00+00:00 2022-04-24T19:32:00+00:00 https://xchg-rax-rax.github.io/posts/whisergate_stage_1/ Lewis Patten Technical analysis of the first stage of WhisperGate, the MBR-wiping pseudo-ransomware deployed against Ukrainian targets in January 2022. Rensenware2022-04-24T02:10:00+00:00 2022-04-24T02:10:00+00:00 https://xchg-rax-rax.github.io/posts/rensenware/ Lewis Patten Reverse engineering Rensenware, a piece of ransomware that demands you score 200 million on Touhou Lunatic mode — and writing a small program to trick it into decrypting your files.