Ransom_Win32_Crystalcrypt_A

YARA detection rule by roadwy

Ransom:Win32/Crystalcrypt.A,SIGNATURE_TYPE_PEHSTR_EXT,1c 00 1c 00 1f 00 00

rule Ransom_Win32_Crystalcrypt_A{
	meta:
		description = "Ransom:Win32/Crystalcrypt.A,SIGNATURE_TYPE_PEHSTR_EXT,1c 00 1c 00 1f 00 00 "
		
	strings :
		$a_01_0 = {43 52 59 53 54 41 4c 43 52 59 50 54 20 52 41 4e 53 4f 4d 57 41 52 45 21 0d 0a 0d 0a 41 4c 4c 20 59 4f 55 52 20 46 49 4c 45 53 20 48 41 56 45 20 42 45 45 4e 20 45 4e 43 52 59 50 54 45 44 } 		$a_01_1 = {59 4f 55 20 42 45 43 41 4d 45 20 41 20 56 49 43 54 49 4d 20 4f 46 20 54 48 45 20 43 52 59 53 54 41 4c 43 52 59 50 54 20 52 41 4e 53 4f 4d 57 41 52 45 21 } 		$a_01_2 = {50 41 59 20 30 2e 31 37 20 42 49 54 43 4f 49 4e 53 20 54 4f 20 54 48 49 53 20 41 44 44 52 45 53 53 20 3a 20 31 4c 53 67 76 59 46 59 37 53 44 4e 6a 65 32 4d 68 73 6d 35 31 46 78 68 71 50 73 62 76 58 45 68 70 45 } 		$a_01_3 = {59 4f 55 20 43 41 4e 20 46 49 4e 44 20 54 48 45 4d 20 4f 4e 20 59 4f 55 52 20 44 45 53 4b 54 4f 50 20 49 4e 20 22 43 52 59 53 54 41 4c 43 52 59 50 54 5f 55 4e 49 51 45 49 44 2e 54 58 54 22 } 		$a_01_4 = {42 69 74 63 6f 69 6e 20 41 64 64 72 65 73 73 3a 20 31 34 6a 35 31 54 72 65 52 47 54 65 58 71 69 39 74 4a 38 77 43 61 66 33 57 73 65 62 31 4c 32 31 57 4d } 		$a_01_5 = {43 00 72 00 79 00 73 00 74 00 61 00 6c 00 43 00 72 00 79 00 70 00 74 00 5f 00 52 00 65 00 63 00 6f 00 76 00 65 00 72 00 5f 00 49 00 6e 00 73 00 74 00 75 00 63 00 74 00 69 00 6f 00 6e 00 73 00 2e 00 70 00 6e 00 67 00 } 		$a_01_6 = {41 5f 44 72 69 76 65 } 		$a_01_7 = {42 5f 44 72 69 76 65 } 		$a_01_8 = {44 5f 44 72 69 76 65 } 		$a_01_9 = {45 5f 44 72 69 76 65 } 		$a_01_10 = {46 5f 44 72 69 76 65 } 		$a_01_11 = {47 5f 44 72 69 76 65 } 		$a_01_12 = {48 5f 44 72 69 76 65 } 		$a_01_13 = {49 5f 44 72 69 76 65 } 		$a_01_14 = {4a 5f 44 72 69 76 65 } 		$a_01_15 = {4b 5f 44 72 69 76 65 } 		$a_01_16 = {4c 5f 44 72 69 76 65 } 		$a_01_17 = {4d 5f 44 72 69 76 65 } 		$a_01_18 = {4e 5f 44 72 69 76 65 } 		$a_01_19 = {4f 5f 44 72 69 76 65 } 		$a_01_20 = {50 5f 44 72 69 76 65 } 		$a_01_21 = {51 5f 44 72 69 76 65 } 		$a_01_22 = {52 5f 44 72 69 76 65 } 		$a_01_23 = {53 5f 44 72 69 76 65 } 		$a_01_24 = {54 5f 44 72 69 76 65 } 		$a_01_25 = {55 5f 44 72 69 76 65 } 		$a_01_26 = {56 5f 44 72 69 76 65 } 		$a_01_27 = {57 5f 44 72 69 76 65 } 		$a_01_28 = {58 5f 44 72 69 76 65 } 		$a_01_29 = {59 5f 44 72 69 76 65 } 		$a_01_30 = {5a 5f 44 72 69 76 65 } 	condition:
		((#a_01_0  & 1)*4+(#a_01_1  & 1)*4+(#a_01_2  & 1)*4+(#a_01_3  & 1)*4+(#a_01_4  & 1)*4+(#a_01_5  & 1)*4+(#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+(#a_01_21  & 1)*1+(#a_01_22  & 1)*1+(#a_01_23  & 1)*1+(#a_01_24  & 1)*1+(#a_01_25  & 1)*1+(#a_01_26  & 1)*1+(#a_01_27  & 1)*1+(#a_01_28  & 1)*1+(#a_01_29  & 1)*1+(#a_01_30  & 1)*1) >=28
 
}

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

edd0daa5-d9a8-44a3-8349-f9c4bcea92bc

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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

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

[[ currentRule.title ]]

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