Ransom_Win32_Wyhymyz_B

YARA detection rule by roadwy

Ransom:Win32/Wyhymyz.B,SIGNATURE_TYPE_PEHSTR_EXT,07 00 07 00 05 00 00

rule Ransom_Win32_Wyhymyz_B{
	meta:
		description = "Ransom:Win32/Wyhymyz.B,SIGNATURE_TYPE_PEHSTR_EXT,07 00 07 00 05 00 00 "
		
	strings :
		$a_03_0 = {80 7d f4 48 [0-04] 80 7d f5 45 [0-04] 80 7d f6 52 [0-04] 80 7d f7 4d [0-04] 80 7d f8 45 [0-04] 80 7d f9 53 } 		$a_80_1 = {5c 44 45 43 52 59 50 54 5f 49 4e 46 4f 52 4d 41 54 49 4f 4e 2e 74 78 74 } 		$a_80_2 = {4d 6f 6c 56 66 66 51 75 44 74 55 50 6c 77 54 4e 65 41 45 47 6f 59 77 62 5a 47 49 4c 57 } 		$a_03_3 = {6a 01 68 10 66 00 00 ff ?? ?? ff 15 } 		$a_80_4 = {73 68 61 64 6f 77 73 74 6f 72 61 67 65 20 76 73 73 61 64 6d 69 6e 20 44 65 6c 65 74 65 20 76 73 73 61 64 6d 69 6e 20 72 65 73 69 7a 65 20 2e 64 73 6b } 	condition:
		((#a_03_0  & 1)*4+(#a_80_1  & 1)*2+(#a_80_2  & 1)*1+(#a_03_3  & 1)*1+(#a_80_4  & 1)*1) >=7
 
}

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

dcae08ff-c1e0-4ba8-91e8-5dc3331159f2

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