16 lines
No EOL
871 B
Text
16 lines
No EOL
871 B
Text
rule FE_APT_Webshell_PL_RAPIDPULSE_1
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{
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meta:
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author = "Mandiant"
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date_created = "2021-05-17"
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strings:
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$r1 = /my[\x09\x20]{1,32}@\w{1,64}[\x09\x20]{0,32}=[\x09\x20]{0,32}split[\x09\x20]{0,32}\([\x09\x20]{0,32}\x2f\x2f/
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$r2 = /my[\x09\x20]{1,32}\$\w{1,64}[\x09\x20]{0,32}=[\x09\x20]{0,32}MIME::Base64::decode_base64[\x09\x20]{0,32}\([\x09\x20]{0,32}\$\w{1,64}[\x09\x20]{0,32}\)[\x09\x20]{0,32};[\S\s]{0,128}my[\x09\x20]{1,32}\$\w{1,64}[\x09\x20]{0,32}=[\x09\x20]{0,32}substr[\x09\x20]{0,32}\([\x09\x20]{0,32}\$\w{1,64}[\x09\x20]{0,32},[\x09\x20]{0,32}\d[\x09\x20]{0,32}\)[\x09\x20]{0,32};[\s\S]{0,64}return[\x09\x20]{1,32}\$/
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$s1 = "use MIME::Base64"
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$s2 = "CGI::param("
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$s3 = "popen"
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$s4 = "print CGI::header()"
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$s5 = "(0..255)"
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condition:
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(all of ($s*)) and (@r1[1] < @r2[1])
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} |