TrojanDownloader_O97M_Ursnif_RVF_MTB

YARA detection rule by roadwy

TrojanDownloader:O97M/Ursnif.RVF!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,01 00 01 00 02 00 00

rule TrojanDownloader_O97M_Ursnif_RVF_MTB{
	meta:
		description = "TrojanDownloader:O97M/Ursnif.RVF!MTB,SIGNATURE_TYPE_MACROHSTR_EXT,01 00 01 00 02 00 00 "
		
	strings :
		$a_03_0 = {2e 45 78 65 63 20 28 22 63 6d 64 20 2f 63 20 63 75 72 6c 20 68 74 74 70 3a 2f 2f 31 30 39 2e 32 34 38 2e 31 31 2e 31 35 35 2f 6e 65 74 77 6f 72 6b 2e 65 78 65 20 2d 6f 20 25 41 50 50 44 41 54 41 25 5c [0-14] 2e 65 78 65 } 		$a_03_1 = {2e 45 78 65 63 20 28 22 63 6d 64 20 2f 63 20 63 75 72 6c 20 68 74 74 70 3a 2f 2f 31 39 31 2e 31 30 31 2e 32 2e 33 39 2f 69 6e 73 74 61 6c 6c 61 7a 69 6f 6e 65 2e 65 78 65 20 2d 6f 20 25 41 50 50 44 41 54 41 25 5c [0-14] 2e 65 78 65 } 	condition:
		((#a_03_0  & 1)*1+(#a_03_1  & 1)*1) >=1
 
}

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

36386eb9-ed4a-4b17-9862-15f7e1d1a295

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