Trojan_BAT_CrysenLoader_MTB

YARA detection rule by roadwy

Trojan:BAT/CrysenLoader!MTB,SIGNATURE_TYPE_PEHSTR_EXT,17 00 17 00 17 00 00

rule Trojan_BAT_CrysenLoader_MTB{
	meta:
		description = "Trojan:BAT/CrysenLoader!MTB,SIGNATURE_TYPE_PEHSTR_EXT,17 00 17 00 17 00 00 "
		
	strings :
		$a_01_0 = {47 65 74 50 72 6f 63 65 73 73 42 79 49 64 } 		$a_01_1 = {52 65 73 75 6d 65 54 68 72 65 61 64 } 		$a_01_2 = {44 6f 77 6e 6c 6f 61 64 46 69 6c 65 } 		$a_01_3 = {50 72 6f 63 65 73 73 57 69 6e 64 6f 77 53 74 79 6c 65 } 		$a_01_4 = {47 65 74 54 65 6d 70 46 69 6c 65 4e 61 6d 65 } 		$a_01_5 = {45 64 69 74 6f 72 42 72 6f 77 73 61 62 6c 65 53 74 61 74 65 } 		$a_01_6 = {53 79 73 74 65 6d 2e 54 68 72 65 61 64 69 6e 67 } 		$a_01_7 = {46 72 6f 6d 42 61 73 65 36 34 53 74 72 69 6e 67 } 		$a_01_8 = {4b 69 6c 6c } 		$a_01_9 = {47 65 74 4d 61 6e 69 66 65 73 74 52 65 73 6f 75 72 63 65 53 74 72 65 61 6d } 		$a_01_10 = {67 65 74 5f 43 75 72 72 65 6e 74 44 6f 6d 61 69 6e } 		$a_01_11 = {49 6e 76 6f 6b 65 4d 65 6d 62 65 72 } 		$a_01_12 = {43 72 65 61 74 65 44 65 63 72 79 70 74 6f 72 } 		$a_01_13 = {44 65 62 75 67 67 69 6e 67 4d 6f 64 65 73 } 		$a_01_14 = {43 72 65 61 74 65 50 72 6f 63 65 73 73 } 		$a_01_15 = {53 79 73 74 65 6d 2e 52 65 66 6c 65 63 74 69 6f 6e 2e 45 6d 69 74 } 		$a_01_16 = {67 65 74 5f 45 6e 74 72 79 50 6f 69 6e 74 } 		$a_01_17 = {57 6f 77 36 34 47 65 74 54 68 72 65 61 64 43 6f 6e 74 65 78 74 } 		$a_01_18 = {57 6f 77 36 34 53 65 74 54 68 72 65 61 64 43 6f 6e 74 65 78 74 } 		$a_01_19 = {52 65 61 64 50 72 6f 63 65 73 73 4d 65 6d 6f 72 79 } 		$a_01_20 = {57 72 69 74 65 50 72 6f 63 65 73 73 4d 65 6d 6f 72 79 } 		$a_01_21 = {64 65 61 64 20 63 6f 64 65 54 } 		$a_01_22 = {53 74 72 69 70 41 66 74 65 72 4f 62 66 75 73 63 61 74 69 6f 6e } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1+(#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+(#a_01_21  & 1)*1+(#a_01_22  & 1)*1) >=23
 
}

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

5389086d-e264-4167-bfe9-4ff36ccb70ea

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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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