Backdoor_BAT_Crysan_HR_MTB

YARA detection rule by roadwy

Backdoor:BAT/Crysan.HR!MTB,SIGNATURE_TYPE_PEHSTR_EXT,0a 00 0a 00 0a 00 00

rule Backdoor_BAT_Crysan_HR_MTB{
	meta:
		description = "Backdoor:BAT/Crysan.HR!MTB,SIGNATURE_TYPE_PEHSTR_EXT,0a 00 0a 00 0a 00 00 "
		
	strings :
		$a_81_0 = {6b 6a 75 66 64 61 73 2e 65 78 65 } 		$a_01_1 = {43 6c 69 65 6e 74 5f 00 43 6c 69 65 6e 74 5f 2e 65 78 65 } 		$a_01_2 = {53 79 73 74 65 6d 2e 49 4f 2e 43 6f 6d 70 72 65 73 73 69 6f 6e } 		$a_01_3 = {47 5a 69 70 53 74 72 65 61 6d } 		$a_01_4 = {53 79 73 74 65 6d 2e 4c 69 6e 71 } 		$a_01_5 = {4d 44 35 43 72 79 70 74 6f 53 65 72 76 69 63 65 50 72 6f 76 69 64 65 72 } 		$a_01_6 = {52 66 63 32 38 39 38 44 65 72 69 76 65 42 79 74 65 73 } 		$a_01_7 = {52 53 41 43 72 79 70 74 6f 53 65 72 76 69 63 65 50 72 6f 76 69 64 65 72 } 		$a_01_8 = {43 72 65 61 74 65 45 6e 63 72 79 70 74 6f 72 } 		$a_01_9 = {44 65 62 75 67 67 61 62 6c 65 41 74 74 72 69 62 75 74 65 } 	condition:
		((#a_81_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) >=10
 
}

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

2e132bcd-adde-4cf7-aac9-2810e0ad1308

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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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