Trojan_Win32_FileCryptor_BL_MTB

YARA detection rule by roadwy

Trojan:Win32/FileCryptor.BL!MTB,SIGNATURE_TYPE_PEHSTR_EXT,14 00 14 00 04 00 00

rule Trojan_Win32_FileCryptor_BL_MTB{
	meta:
		description = "Trojan:Win32/FileCryptor.BL!MTB,SIGNATURE_TYPE_PEHSTR_EXT,14 00 14 00 04 00 00 "
		
	strings :
		$a_03_0 = {5c 63 72 79 70 74 5c 74 6d 70 5f [0-10] 5c [0-10] 2e 70 64 62 } 		$a_00_1 = {57 72 69 74 65 54 61 70 65 6d 61 72 6b } 		$a_03_2 = {6a 65 66 a3 ?? ?? ?? ?? 58 6a 72 66 a3 ?? ?? ?? ?? 58 6a 6e 66 a3 ?? ?? ?? ?? 58 6a 65 66 a3 ?? ?? ?? ?? 58 6a 6c 66 a3 ?? ?? ?? ?? 58 6a 33 66 a3 ?? ?? ?? ?? 58 6a 32 66 a3 ?? ?? ?? ?? 58 6a 2e 66 a3 ?? ?? ?? ?? 58 6a 64 66 a3 ?? ?? ?? ?? 58 6a 6c } 		$a_00_3 = {30 04 3e 89 75 80 b8 01 00 00 00 83 f0 04 83 6d 80 01 8b 75 80 3b f3 7d e2 } 	condition:
		((#a_03_0  & 1)*1+(#a_00_1  & 1)*1+(#a_03_2  & 1)*10+(#a_00_3  & 1)*10) >=20
 
}

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

32c208b6-41c8-4a62-abfc-ff69dfccf741

Propose edits, view related rules, and engage with the community through comments.

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 ]]

Community Discussion