Ransom_MSIL_HiddenTear_RN_MTB

YARA detection rule by roadwy

Ransom:MSIL/HiddenTear.RN!MTB,SIGNATURE_TYPE_PEHSTR_EXT,07 00 07 00 05 00 00

rule Ransom_MSIL_HiddenTear_RN_MTB{
	meta:
		description = "Ransom:MSIL/HiddenTear.RN!MTB,SIGNATURE_TYPE_PEHSTR_EXT,07 00 07 00 05 00 00 "
		
	strings :
		$a_01_0 = {4c 43 6f 6d 70 75 74 65 72 20 63 6f 64 65 20 6f 6e 20 61 20 73 63 72 65 65 6e 20 77 69 74 68 20 61 20 73 6b 75 6c 6c 20 72 65 70 72 65 73 65 6e 74 69 6e 67 20 61 20 63 6f 6d 70 75 74 65 72 20 76 69 72 75 73 20 2f 20 6d 61 6c 77 61 72 65 20 61 74 74 61 63 6b 2e } 		$a_01_1 = {45 6e 63 72 79 70 74 4f 72 44 65 63 72 79 70 74 46 69 6c 65 } 		$a_01_2 = {41 63 74 69 6f 6e 45 6e 63 72 79 70 74 } 		$a_01_3 = {41 63 74 69 6f 6e 44 65 63 72 79 70 74 } 		$a_01_4 = {72 65 68 61 5f 72 61 6e 73 6f 6d 77 61 72 65 5f 36 35 30 78 33 38 31 } 	condition:
		((#a_01_0  & 1)*5+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1+(#a_01_4  & 1)*5) >=7
 
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

b3d6ac9e-59c9-4ba9-9e33-28ed4b9ac55f

Propose edits, view related rules, and engage with the community through comments.

Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

Community Discussion