/*
Yara Rule Set
Author: Brian Laskowski
Date: 2018-08-26
Identifier: 08-26-18
Reference: https://github.com/Hestat/lw-yara/
*/
/* Rule Set ----------------------------------------------------------------- */
rule pop_up_cache_obsfuscated_malware {
meta:
description = "08-26-18 - file pop-up-cache.php"
author = "Brian Laskowski"
reference = "https://github.com/Hestat/lw-yara/"
date = "2018-08-26"
hash1 = "cd3f2a4a97098fd34619efaf298b68c3b2ff356f5fba071f4fef91ceb752d5de"
strings:
$s1 = "$zzrrzrz___=base64_decode(\"bjF6Ym1hNXZ0MGkyOC1weHVxeTZscmtkZzlfZWhjc3dvNGYzN2o=\");$z__zr_zzrr=$zzrrzrz___{30}.$zzrrzrz___{8}.$" ascii
$s2 = "zrr__zr);}}');${\"\\x47\\x4c\\x4f\\x42\\x41\\x4c\\x53\"}[\"\\x7a\\x72\\x5f\\x7a\\x5f\\x7a\\x72\\x5f\\x7a\\x72\"]();?>" fullword ascii
$s3 = "x7a\\x5f\\x5f\\x7a\\x72\"])?80:$zrrz_z__rz[\"\\x7a\\x5f\\x72\\x7a\\x72\\x7a\\x5f\\x5f\\x7a\\x72\"];}$zrr_zz_rz_=\\'Host:\\';$zrr" ascii
$s4 = "__zzrrrz_,CURLOPT_USERAGENT,\\'WHR\\');${\"\\x47\\x4c\\x4f\\x42\\x41\\x4c\\x53\"}[\"\\x7a\\x5f\\x72\\x5f\\x5f\\x72\\x72\\x7a\\x7" ascii
$s5 = "sdLtPS1wIA\\');unset($zrr_zz_rz_);$zrrzzz___r=\"GET $z__z_zzrrr HTTP/$z__rzr_rzz\\\\r\\\\n\".${\"\\x47\\x4c\\x4f\\x42\\x41\\x4c" ascii
condition:
( uint16(0) == 0x3f3c and
filesize < 60KB and
( all of them )
) or ( all of them )
}
Copyright 2K16 - 2K18 Indonesian Hacker Rulez