When executed in a controlled sandbox environment like ANY.RUN or Tria.ge , the malware performs the following actions:
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
Unauthorized access to AppData\Local\Google\Chrome\User Data . BSitter_820.rar
The archive contains a single executable file, often named BSitter.exe or similar. Static examination reveals several red flags:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run entries pointing to unusual paths in the user profile. When executed in a controlled sandbox environment like ANY
To further analyze this specific sample, it is recommended to use automated sandboxes such as Joe Sandbox or Hybrid Analysis to generate a full process tree and network map.
Credential harvesting, browser data exfiltration (cookies, saved passwords), and environment fingerprinting. 2. Initial Triage (Static Analysis) Executive Summary File Name: BSitter_820
After successfully sending the data, some variants attempt to delete the original executable to minimize the forensic footprint. 4. Forensic Artifacts