Ransom_Win32_Tescrypt_U

YARA detection rule by roadwy

Ransom:Win32/Tescrypt.U,SIGNATURE_TYPE_PEHSTR_EXT,64 00 64 00 03 00 00

rule Ransom_Win32_Tescrypt_U{
	meta:
		description = "Ransom:Win32/Tescrypt.U,SIGNATURE_TYPE_PEHSTR_EXT,64 00 64 00 03 00 00 "
		
	strings :
		$a_01_0 = {52 4f 47 55 45 5f 53 54 41 52 54 00 } 		$a_01_1 = {52 4f 47 55 45 5f 45 4e 44 00 } 		$a_03_2 = {0f be 00 85 c0 74 ?? 8b 45 ?? 03 45 ?? 0f be 00 8b 4d ?? 0f af 4d ?? 03 c1 8b 4d ?? 03 4d ?? 0f b6 09 33 c8 8b 45 ?? 03 45 ?? 88 08 8b 45 ?? 40 89 45 ?? eb } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_03_2  & 1)*1) >=100
 
}

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

1d907e3d-cce6-40a2-bfdf-e07ad7665093

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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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