The script within the archive is usually unreadable to the naked eye. It employs (using Chr() codes), string reversal , and junk code insertion to bypass signature-based antivirus detection.
The file uses a "double extension" or a misleading name to hide its true nature. While the .rar is a container, the internal file is often named something like image.jpg.vbs . Who_wants_to_strip_this_babe.rar
: It reaches out to a Command & Control (C2) server using an HTTP request. The script within the archive is usually unreadable
: It downloads a secondary payload, which is frequently a Remote Access Trojan (RAT) or Infostealer (designed to scrape browser passwords, cookies, and crypto wallets). Anti-Analysis Measures : While the
The script may check for the presence of virtual machines (VMs) or debugging tools (like Wireshark or Process Hacker). If it detects a "sandbox" environment, it will terminate itself to avoid being analyzed by researchers. Key Indicators of Compromise (IoCs)
: Look for wscript.exe or cscript.exe running with high CPU usage or unusual network connections.