Adding a set of yara for Atmos

update ruleset

Delete COZY_FANCY_BEAR_modified_VmUpgradeHelper rule

Deleted COZY_FANCY_BEAR_modified_VmUpgradeHelper

rule Invoke_mimikittenz

Additional rules #145

https://github.com/Yara-Rules/rules/issues/147

Delete Space

Duplecities. We delete MALW_Miscelanea duplicates.

Duplicate rule

Added tags

Finds image files with PHP content

Added a rule to detect hexed version of Citadel by actors.

One does not simply merge into master