Ransom_Win32_WannaCrypt_2

YARA detection rule by roadwy

Ransom:Win32/WannaCrypt,SIGNATURE_TYPE_PEHSTR,7d 00 7d 00 15 00 00

rule Ransom_Win32_WannaCrypt_2{
	meta:
		description = "Ransom:Win32/WannaCrypt,SIGNATURE_TYPE_PEHSTR,7d 00 7d 00 15 00 00 "
		
	strings :
		$a_01_0 = {25 64 2e 25 64 2e 25 64 2e 25 64 } 		$a_01_1 = {5c 5c 25 73 5c 69 70 63 24 } 		$a_01_2 = {74 61 73 6b 68 63 73 74 2e 65 78 65 } 		$a_01_3 = {6c 73 61 73 76 73 2e 65 78 65 } 		$a_01_4 = {63 6f 77 62 6f 79 } 		$a_01_5 = {73 70 61 72 6b 79 } 		$a_01_6 = {62 69 67 64 6f 67 } 		$a_01_7 = {6d 65 72 6c 69 6e } 		$a_01_8 = {66 75 63 6b 65 72 } 		$a_01_9 = {63 6f 72 76 65 74 74 65 } 		$a_01_10 = {61 73 73 68 6f 6c 65 } 		$a_01_11 = {74 72 75 73 74 6e 6f 31 } 		$a_01_12 = {66 75 63 6b 79 6f 75 } 		$a_01_13 = {66 75 63 6b 6d 65 } 		$a_01_14 = {73 75 70 65 72 6d 61 6e } 		$a_01_15 = {77 65 6c 6b 6f 6d 65 } 		$a_01_16 = {72 6f 6f 74 } 		$a_01_17 = {6c 65 74 6d 65 69 6e } 		$a_01_18 = {64 72 61 67 6f 6e } 		$a_01_19 = {70 61 73 73 77 30 72 64 } 		$a_01_20 = {70 40 73 73 77 30 72 64 } 	condition:
		((#a_01_0  & 1)*50+(#a_01_1  & 1)*50+(#a_01_2  & 1)*10+(#a_01_3  & 1)*10+(#a_01_4  & 1)*1+(#a_01_5  & 1)*1+(#a_01_6  & 1)*1+(#a_01_7  & 1)*1+(#a_01_8  & 1)*1+(#a_01_9  & 1)*1+(#a_01_10  & 1)*1+(#a_01_11  & 1)*1+(#a_01_12  & 1)*1+(#a_01_13  & 1)*1+(#a_01_14  & 1)*1+(#a_01_15  & 1)*1+(#a_01_16  & 1)*1+(#a_01_17  & 1)*1+(#a_01_18  & 1)*1+(#a_01_19  & 1)*1+(#a_01_20  & 1)*1) >=125
 
}

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

d87921f6-9e31-45c0-8dfd-3d79642bbbdb

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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 ]]

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