Ransom_Win32_StopCrypt_MYK_MTB_2

YARA detection rule by roadwy

Ransom:Win32/StopCrypt.MYK!MTB,SIGNATURE_TYPE_PEHSTR_EXT,01 00 01 00 04 00 00

rule Ransom_Win32_StopCrypt_MYK_MTB_2{
	meta:
		description = "Ransom:Win32/StopCrypt.MYK!MTB,SIGNATURE_TYPE_PEHSTR_EXT,01 00 01 00 04 00 00 "
		
	strings :
		$a_03_0 = {c1 e8 05 89 45 ?? c7 05 ?? ?? ?? ?? ?? ?? ?? ?? 8b 85 ?? ?? ?? ?? 01 45 90 1b 00 83 3d ?? ?? ?? ?? ?? 75 } 		$a_03_1 = {c1 e8 05 89 45 ?? c7 05 ?? ?? ?? ?? ?? ?? ?? ?? 8b 85 ?? ?? ?? ?? 01 45 90 1b 00 81 3d ?? ?? ?? ?? ?? ?? 00 00 75 } 		$a_03_2 = {8d 1c 01 8b 4d 6c d3 e8 c7 05 ?? ?? ?? ?? ?? ?? ?? ?? 89 45 ?? 8b 85 80 fe ff ff 01 45 90 1b 01 8b 55 90 1b 01 33 d3 33 55 64 8d 8d } 		$a_03_3 = {8d 1c 10 d3 ea c7 05 ?? ?? ?? ?? ?? ?? ?? ?? 89 55 ?? 8b 85 04 fe ff ff 01 45 90 1b 01 8b 4d 90 1b 01 33 cb 33 4d e8 8d 85 } 	condition:
		((#a_03_0  & 1)*1+(#a_03_1  & 1)*1+(#a_03_2  & 1)*1+(#a_03_3  & 1)*1) >=1
 
}

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

1f7796be-03c7-490c-a070-d481595d83ac

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