/*
This Yara ruleset is under the GNU-GPLv2 license (http://www.gnu.org/licenses/gpl-2.0.html) and open to any user or organization, as long as you use it under this license.
*/
/*
Yara Rule Set
Author: Florian Roth
Date: 2016-03-24
Identifier: Petya Ransomware
*/
/* Rule Set ----------------------------------------------------------------- */
rule Petya_Ransomware {
meta:
description = "Detects Petya Ransomware"
author = "Florian Roth"
reference = "http://www.heise.de/newsticker/meldung/Erpressungs-Trojaner-Petya-riegelt-den-gesamten-Rechner-ab-3150917.html"
date = "2016-03-24"
hash = "26b4699a7b9eeb16e76305d843d4ab05e94d43f3201436927e13b3ebafa90739"
strings:
$a1 = "<description>WinRAR SFX module</description>" fullword ascii
$s1 = "BX-Proxy-Manual-Auth" fullword wide
$s2 = "<!--The ID below indicates application support for Windows 10 -->" fullword ascii
$s3 = "X-HTTP-Attempts" fullword wide
$s4 = "@CommandLineMode" fullword wide
$s5 = "X-Retry-After" fullword wide
condition:
uint16(0) == 0x5a4d and filesize < 500KB and $a1 and 3 of ($s*)
}