Backdoor_Linux_GetShell_B_xp

YARA detection rule by roadwy

Backdoor:Linux/GetShell.B!xp,SIGNATURE_TYPE_ELFHSTR_EXT,02 00 02 00 04 00 00

rule Backdoor_Linux_GetShell_B_xp{
	meta:
		description = "Backdoor:Linux/GetShell.B!xp,SIGNATURE_TYPE_ELFHSTR_EXT,02 00 02 00 04 00 00 "
		
	strings :
		$a_02_0 = {31 db 53 43 53 6a 0a 89 e1 6a 66 58 cd 80 96 99 52 52 52 52 52 52 66 68 ?? ?? 66 68 0a 00 89 e1 6a 1c 51 56 89 e1 43 6a 66 58 cd 80 b0 66 b3 04 cd 80 52 52 56 89 e1 43 b0 66 cd 80 93 59 } 		$a_00_1 = {6a 3f 58 cd 80 49 79 f8 68 2f 2f 73 68 68 2f 62 69 6e 89 e3 50 53 89 e1 b0 0b cd 80 } 		$a_02_2 = {31 db f7 e3 53 43 53 6a 02 89 e1 b0 66 cd 80 93 59 b0 3f cd 80 49 79 f9 68 ?? ?? ?? ?? 68 02 00 ?? ?? 89 e1 b0 66 } 		$a_00_3 = {50 51 53 b3 03 89 e1 cd 80 52 68 6e 2f 73 68 68 2f 2f 62 69 89 e3 52 53 89 e1 b0 0b cd 80 } 	condition:
		((#a_02_0  & 1)*1+(#a_00_1  & 1)*1+(#a_02_2  & 1)*1+(#a_00_3  & 1)*1) >=2
 
}

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

5ab77e64-c9fc-4ca0-b456-513bba9ec641

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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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