Common behavior includes scanning for Login Data in browser profiles (Chrome/Edge) or targeting Discord tokens. Summary of Findings Observation Persistence Scheduled Task or Registry Key Language Network C2 communication on non-standard ports Objective Likely an Infostealer or Downloader Indicators of Compromise (IoCs) Filename: WinFormsApp23.11.exe Dropped Files: %TEMP%\tmpXXXX.tmp
Since this is a .NET application, it can be reverted to near-source code using or ILSpy . WinFormsApp23.11.zip
Upon extracting the archive, the primary file is a standard Windows executable. Using tools like or PEStudio , the following attributes are identified: Common behavior includes scanning for Login Data in
This write-up covers the analysis of , a suspicious archive containing a .NET-based executable . The analysis focuses on its behavior, underlying code, and indicators of compromise (IoCs). File Overview Archive Name: WinFormsApp23.11.zip Contained File: WinFormsApp23.11.exe Platform: Windows (.NET Framework / .NET Core) Type: Windows Forms Application 1. Initial Static Analysis Using tools like or PEStudio , the following
Running the sample in a sandbox (e.g., ANY.RUN or Flare-VM) reveals the following actions:
Standard .NET libraries ( mscoree.dll ) and Windows Forms namespaces. Architecture: Likely x86 or AnyCPU. 2. Decompilation & Code Review
If the code contains randomized variable names (e.g., a() , b() ), it has likely been processed with ConfuserEx or Dotfuscator .