mirror of
https://github.com/scr34m/php-malware-scanner.git
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89 lines
2.5 KiB
Plaintext
89 lines
2.5 KiB
Plaintext
#eval /* */
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eval\/\*[a-z0-9]+\*\/
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#
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eval\([a-z0-9]{4,}\(\$[a-z0-9]{4,}, \$[0-9a-z]{4,}\)\);
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#
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(chr\(\d+\^\d+\)\.){4,}
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#
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(\$[a-z0-9]{3,}\[\d+\]\.){4,}
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#
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chr\(\d+\)\.""\.""\.""\.""\.""
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# escaped commands pl.: "eval(base64_decode(" equal "\145\166\141\154\050\142\141\163\145\066\064\137\144\145\143\157\144\145\050"
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(\\[0-9]{3}){6,}
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#
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\$GLOBALS\[\$GLOBALS['[a-z0-9]{4,}'\]\[\d+\]\.\$GLOBALS\['[a-z-0-9]{4,}'\]\[\d+\].
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#
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\$GLOBALS\['[a-z0-9]{5,}'\] = \$[a-z]+\d+\[\d+\]\.\$[a-z]+\d+\[\d+\]\.\$[a-z]+\d+\[\d+\]\.\$[a-z]+\d+\[\d+\]\.
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#
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eval\([a-z0-9_]+\(base64_decode\(
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#
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\$[a-z]{3,}=\$[a-z]{3,}\("",\$[a-z]{3,}\);\$[a-z]{3,}\(\);
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#
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{\s*eval\s*\(\s*\$
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#
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Googlebot['"]{0,1}\s*\)\){echo\s+file_get_contents
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#execute base64 code
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eVaL\(\s*trim\(\s*baSe64_deCoDe\(
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#
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if\s*\(\s*mail\s*\(\s*\$mails\[\$i\]\s*,\s*\$tema\s*,\s*base64_encode\s*\(\s*\$text
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# Write HTTP Request to File
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fwrite\s*\(\s*\$fh\s*,\s*stripslashes\s*\(\s*@*\$_(GET|POST|SERVER|COOKIE|REQUEST)\[
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# Download Remote Code
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echo\s+file_get_contents\s*\(\s*base64_url_decode\s*\(\s*@*\$_(GET|POST|SERVER|COOKIE|REQUEST)
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# 'eval' in ascii chr() chars
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chr\s*\(\s*101\s*\)\s*\.\s*chr\s*\(\s*118\s*\)\s*\.\s*chr\s*\(\s*97\s*\)\s*\.\s*chr\s*\(\s*108\s*\)
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#
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(\$OOO_O_000_\{\d+\}.){3,}
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#Detects the '_' character encoded in a string like "\x5F". '_' is present in many functions that malware would want to hide.
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# '_' as "\x5f"
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\\[Xx](5[Ff])
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#Detects the '_' character placed inside a call to the 'chr()' function
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# '_' as 'chr(95)' or 'chr(0x5f)'
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chr\s*\(\s*['"]?\s*((95)|(0[Xx]5[Ff]))\s*['"]?\s*\)
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#Detects generic base64 strings longer than 260 characters enclosed in quotes ending with 0-3 '=' chars.
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#260 was a threshold chosen because strings of 256 characters are common enough. Might increase later to reduce false positives.
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#Long base64 quoted string.
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['"][A-Za-z0-9+\/]{260,}={0,3}['"]
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#Detects long single lines contained within PHP tags.
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#We can increase from 1100 later if we need to.
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#Long single line of PHP.
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^.*<\?php.{1100,}\?>.*$
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#Escaped path characters: \x2fho\x6de/\x69mp\x75ls\x69oq\x65/w\x77w. or \x2fhome\x2fimpu\x6csioq\x65/www\x2emusc
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(\\x[0-9abcdef]{2}[a-z0-9.-\/]{1,4}){4,}
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#Malware inffected files sometimes marked with comments like /*87cda*/ to avoid infect again
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\/\*[a-z0-9]{5}\*\/
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# XOR-ed strings with custom math
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%\(\d+\-\d+\+\d+\)==\(\-\d+\+\d+\+\d+\)
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# eval code from POST on second nested level
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eval\(\$[a-z0-9_]+\(\$_POST
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# characted concated with chr() alteast 3 times
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("[a-z0-9]+"\.chr\(\d+\)\.){3,}
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# nested function call used variables
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\$[a-z]+\(\$[a-z0-9]+\( |