Sneed-Reactivity/yara-mikesxrs/evild3ad/mime_mso_activemime_base64.yara

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rule MIME_MSO_ActiveMime_base64
{
meta:
author = "Martin Willing (https://evild3ad.com)"
description = "Detect MIME MSO Base64 encoded ActiveMime file"
date = "2016-02-28"
filetype = "Office documents"
strings:
$mime = "MIME-Version:"
$base64 = "Content-Transfer-Encoding: base64"
$mso = "Content-Type: application/x-mso"
//$activemime = /Q(\x0D\x0A|)W(\x0D\x0A|)N(\x0D\x0A|)0(\x0D\x0A|)a(\x0D\x0A|)X(\x0D\x0A|)Z(\x0D\x0A|)l(\x0D\x0A|)T(\x0D\x0A|)W/
condition:
$mime at 0 and $base64 and $mso //and $activemime
}