UNC2891_Caketap

YARA detection rule by Frank Boldewin (@r3c0nst)

Detects UNC2891 Rootkit Caketap

rule UNC2891_Caketap
{
	meta:
		description = "Detects UNC2891 Rootkit Caketap"
		author = "Frank Boldewin (@r3c0nst)"
		date = "2022-30-03"		

	strings:
		$str1  = ".caahGss187" ascii fullword 		$str2 = "ipstat" ascii 		$code1 = {41 80 7E 06 4B 75 ?? 41 80 7E 07 57 75 ?? 41 0F B6 46 2B} 		$code2 = {41 C6 46 01 3D 41 C6 46 08 32} 
	condition:
        uint32 (0) ==  0x464c457f and (all of ($code*) or (all of ($str*) and #str2 == 2))
}

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

d7a74505-3739-4d0f-a08e-60cc95131648

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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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