Trojan_Win32_Formbook_MB_MTB

YARA detection rule by roadwy

Trojan:Win32/Formbook.MB!MTB,SIGNATURE_TYPE_PEHSTR_EXT,15 00 15 00 07 00 00

rule Trojan_Win32_Formbook_MB_MTB{
	meta:
		description = "Trojan:Win32/Formbook.MB!MTB,SIGNATURE_TYPE_PEHSTR_EXT,15 00 15 00 07 00 00 "
		
	strings :
		$a_81_0 = {57 41 5f 56 4d 53 49 42 } 		$a_81_1 = {66 62 63 72 65 61 74 65 75 73 65 72 } 		$a_81_2 = {54 5f 5f 32 33 65 33 31 63 30 55 } 		$a_81_3 = {62 61 73 65 36 34 42 69 6e 61 72 79 } 		$a_81_4 = {53 79 73 44 61 74 65 54 69 6d 65 50 69 63 6b 33 32 } 		$a_81_5 = {47 65 74 4d 6f 6e 69 74 6f 72 49 6e 66 6f 41 } 		$a_00_6 = {61 35 62 4b 62 61 62 77 62 8d 62 a6 62 bc 62 d2 62 e8 62 fe 62 14 62 2a 63 49 63 5b 63 71 63 87 63 9d 63 } 	condition:
		((#a_81_0  & 1)*3+(#a_81_1  & 1)*3+(#a_81_2  & 1)*3+(#a_81_3  & 1)*3+(#a_81_4  & 1)*3+(#a_81_5  & 1)*3+(#a_00_6  & 1)*3) >=21
 
}

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

033d5bcb-2640-45f5-b133-65af9327d9bf

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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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