Bsitter_820.rar • Original & Trusted

The stolen data is bundled into a ZIP or RAR format and exfiltrated via HTTP/HTTPS POST requests to a remote server.

HKCU\Software\Microsoft\Windows\CurrentVersion\Run entries pointing to unusual paths in the user profile.

This write-up covers the analysis of the BSitter_820.rar file, a sample frequently used in malware analysis and digital forensics training scenarios. This archive typically contains a or Downloader designed to exfiltrate browser data and system information. 1. Executive Summary File Name: BSitter_820.rar Target OS: Windows Malware Type: Infostealer / Trojan BSitter_820.rar

Credential harvesting, browser data exfiltration (cookies, saved passwords), and environment fingerprinting. 2. Initial Triage (Static Analysis)

The binary imports functions for network communication ( ws2_32.dll ), registry manipulation ( advapi32.dll ), and process injection. The stolen data is bundled into a ZIP

Large outbound POST requests to unknown IP addresses, particularly those associated with free hosting or VPS providers. 5. Recommendation

The archive contains a single executable file, often named BSitter.exe or similar. Static examination reveals several red flags: This archive typically contains a or Downloader designed

It targets Chromium-based browsers to extract Login Data , Web Data , and Cookies . It also searches for cryptocurrency wallet files (e.g., wallet.dat ).