pay.aspx

Pay.aspx is a harmful malware that is part of the China Chopper webshell, specifically designed to exploit and damage computer systems. It infiltrates systems via suspicious downloads, emails, or websites, often without the user's knowledge. Once it has gained access, it can steal personal information, disrupt operations, or even hold data hostage for ransom. The pay.aspx file operates similarly to the stylecss.aspx webshell, with the primary distinction being the URL parameter 'vuiHWNVJAEF' which pay.aspx uses to obtain and execute JScript. A recent advisory from the Canadian Center for Cyber Security discussed the similarities and differences between the stylecss.aspx and pay.aspx webshells. The comparison showed that while both are part of the same family of malware, they utilize different methods to achieve their malicious objectives. The major difference lies in the specific URL parameters each webshell uses, with pay.aspx employing the unique 'vuiHWNVJAEF' parameter to run its harmful scripts. The alert issued by the Canadian Center for Cyber Security also included the SHA256 hashes of the files associated with this campaign. The hash for the pay.aspx file was identified as 05108ac3c3d708977f2d679bfa6d2eaf63b371e66428018a68efce4b6a45b4b4. This information provides a precise digital fingerprint of the file, enabling cybersecurity professionals to identify and track the spread of this particular strain of malware.