Worm_Win32_Fesber_G

YARA detection rule by roadwy

Worm:Win32/Fesber.G,SIGNATURE_TYPE_PEHSTR,04 00 04 00 04 00 00

rule Worm_Win32_Fesber_G{
	meta:
		description = "Worm:Win32/Fesber.G,SIGNATURE_TYPE_PEHSTR,04 00 04 00 04 00 00 "
		
	strings :
		$a_01_0 = {46 53 42 2d 49 53 2d 4d 59 2d 48 45 57 52 4f } 		$a_01_1 = {43 3a 5c 66 73 62 2e 73 74 62 } 		$a_01_2 = {5c 6e 6f 74 70 61 64 2e 65 78 65 } 		$a_01_3 = {5c 66 73 62 2e 74 6d 70 } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1) >=4
 
}

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

11459d87-97f6-40ef-ab14-219737408d8f

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