Ransom_MSIL_Lossymem

YARA detection rule by roadwy

Ransom:MSIL/Lossymem,SIGNATURE_TYPE_PEHSTR_EXT,06 00 06 00 04 00 00

rule Ransom_MSIL_Lossymem{
	meta:
		description = "Ransom:MSIL/Lossymem,SIGNATURE_TYPE_PEHSTR_EXT,06 00 06 00 04 00 00 "
		
	strings :
		$a_01_0 = {4c 6f 6e 67 54 65 72 6d 4d 65 6d 6f 72 79 4c 6f 73 73 2e 65 78 65 } 		$a_01_1 = {43 3a 5c 55 73 65 72 73 5c 41 73 6d 63 78 31 35 5c 64 6f 63 75 6d 65 6e 74 73 5c 76 69 73 75 61 6c 20 73 74 75 64 69 6f 20 32 30 31 37 5c 50 72 6f 6a 65 63 74 73 5c 4c 6f 6e 67 54 65 72 6d 4d 65 6d 6f 72 79 4c 6f 73 73 5c 4c 6f 6e 67 54 65 72 6d 4d 65 6d 6f 72 79 4c 6f 73 73 5c 6f 62 6a 5c 44 65 62 75 67 5c 4c 6f 6e 67 54 65 72 6d 4d 65 6d 6f 72 79 4c 6f 73 73 2e 70 64 62 } 		$a_01_2 = {4c 6f 6e 67 54 65 72 6d 4d 65 6d 6f 72 79 4c 6f 73 73 2e 57 61 72 6e 47 55 49 2e 72 65 73 6f 75 72 63 65 73 } 		$a_01_3 = {4c 00 6f 00 6e 00 67 00 54 00 65 00 72 00 6d 00 4d 00 65 00 6d 00 6f 00 72 00 79 00 4c 00 6f 00 73 00 73 00 } 	condition:
		((#a_01_0  & 1)*2+(#a_01_1  & 1)*2+(#a_01_2  & 1)*2+(#a_01_3  & 1)*2) >=6
 
}

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

4b3c93e1-939c-47f5-a1bc-1879649756b4

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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 ]]

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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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