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6b3e91a Jun 13, 2017
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@xambroz @mmorenog @plutec
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/*
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.
*/
rule with_urls : mail {
meta:
author = "Antonio Sanchez <asanchez@hispasec.com>"
reference = "http://laboratorio.blogs.hispasec.com/"
description = "Rule to detect the presence of an or several urls"
strings:
$eml_01 = "From:"
$eml_02 = "To:"
$eml_03 = "Subject:"
$url_regex = /https?:\/\/([\w\.-]+)([\/\w \.-]*)/
condition:
all of them
}
rule without_urls : mail {
meta:
author = "Antonio Sanchez <asanchez@hispasec.com>"
reference = "http://laboratorio.blogs.hispasec.com/"
description = "Rule to detect the no presence of any url"
strings:
$eml_01 = "From:"
$eml_02 = "To:"
$eml_03 = "Subject:"
$url_regex = /https?:\/\/([\w\.-]+)([\/\w \.-]*)/
condition:
all of ( $eml_* ) and
not $url_regex
}