Upon extracting the archive, the primary file is a standard Windows executable. Using tools like or PEStudio , the following attributes are identified:
Software\Microsoft\Windows\CurrentVersion\Run\WinFormsApp WinFormsApp23.11.zip
If the code contains randomized variable names (e.g., a() , b() ), it has likely been processed with ConfuserEx or Dotfuscator . Upon extracting the archive, the primary file is
Running the sample in a sandbox (e.g., ANY.RUN or Flare-VM) reveals the following actions: Upon extracting the archive
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
Check the Resources section. Malware often hides an encrypted second-stage executable or a DLL inside the manifest resources, which is decrypted at runtime using AES or a simple XOR stub. 3. Dynamic Behavior
High (suggesting possible packing or encrypted payloads).