ĐĐinh Văn MạnhSep 5 · 18 min readMoiClient: Backdoor That Hides Inside SumatraPDFOverview On September 2, 2026, AhnLab ASEC (ATCP team) published an analysis of MoiClient — a newly identified Windows backdoor distributed via a fake invoice email, deploying a notable multi-layer deblog.fiscybersec.com
