![]() ![]() Script kiddies, lamers, and inattentive pirates will use webshells without looking carefully at the code. The malicious script from looks like this: 1Ī= new /**/ Image() a. The goal is always the same : each time the page is displayed, the website hosting the webshell will do a request to the malicious address and send the URL where it comes from, permiting to the malicious author to know all the website hosting the backdoored webshell. \/Next code isn't for set_time_limit( 0) įoreach( $host_allow as $k=> $v), 500) Īnd unpack code can be a lot more complex than only base64_decode it or hex_to_ascii it. in fact the flaw was deliberately inserted into the code to permit the webshell author to bypass it. This webshell is protected by a customizable password, so interface access is limited to people who know the password.īut the password verification mechanism is vulnerable. ![]() Attackers uploads it on web server in order to get information and above all execute commands with web user privileges (ex: www-data).
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