Add malware attachment rule, see https://posts.specterops.io/the-tale-of-settingcontent-ms-files-f1ea253e4d39?gi=7ec45f2481ce
Add malware attachment rule, see https://posts.specterops.io/the-tale-of-settingcontent-ms-files-f1ea253e4d39?gi=7ec45f2481ce

git-svn-id: e9fe9b84e32fc5e57b7d09c40cd78b14ea28ed71@1835065 13f79535-47bb-0310-9956-ffa450edef68

apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin