![]() ![]() Here are two examples of obfuscated malicious scripts using goto. ![]() The authors of our malware samples use the goto construct in predictable ways. The target label must be within the same file and context-you cannot jump out of a function or method, nor can you jump into one. You can only jump within the same universe. Note, however, that PHP does not have a full unrestricted goto. This is the place where control jumps to. The destination is a label, a text token followed by a colon. The branching point is a statement using the keyword goto followed by a destination label. In a PHP program, goto is an unconditional branching statement, an all-purpose hyperspace jump, moving program control from one place to another, from source to destination. ![]() Malware sample using goto What is the goto construct and how does it work in PHP? Here’s an example of malware using this technique. That’s why professional programmers rarely use them. Number of incidents of malware using 'goto', May 7-July 19, 2019Ī generous sprinkling of goto’s makes any source code dish messy and difficult to swallow. Here’s a chart showing the recent surge of malware using goto as an obfuscating mechanism. ![]() Imunify’s Malware Intelligence Team has been witnessing an increase in malware samples using the goto programming construct. ![]()
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