APT_acidbox_main_module_dll

YARA detection rule by Marc Rivero | McAfee ATR Team · Apache-2.0

Rule to detect the Main mode component of AcidBox

rule APT_acidbox_main_module_dll
{
    meta:
    
        description = "Rule to detect the Main mode component of AcidBox"
        author = "Marc Rivero | McAfee ATR Team"
        date = "2020-07-24"
        rule_version = "v1"
        malware_type = "backdoor"
        malware_family = "Backdoor:W32/Acidbox"
        actor_type = "APT"
        actor_group = "Turla"
        hash1 = "eb30a1822bd6f503f8151cb04bfd315a62fa67dbfe1f573e6fcfd74636ecedd5"
    
    strings:

        $pattern_0 = { 7707 b8022d03a0 eb05 e8???????? }
        $pattern_1 = { 4403c8 8bc3 41d1c6 33c6 81c6d6c162ca c1cb02 33c7 }
        $pattern_2 = { e9???????? 412b5c2418 8b45dc 412b442408 41015c241c 410144240c 015f1c }
        $pattern_3 = { 48895c2408 57 4883ec30 488bfa 33db 4885c9 7479 }
        $pattern_4 = { 48895c2408 57 4883ec30 498bd8 488bfa 488364245800 85c9 }
        $pattern_5 = { 488987e0010000 e9???????? 81cb001003a0 e9???????? 488b87a0010000 44847806 742e }
        $pattern_6 = { 4d8bcc 4c8d0596c50100 498bd4 488bce e8???????? 498b9de0010000 c74605aa993355 }
        $pattern_7 = { 4533c0 8d5608 e8???????? 488bf0 4889442460 4885c0 750b }
        $pattern_8 = { 488d5558 41c1ee08 41b802000000 44887559 e8???????? 4c8b4de0 894718 }
        $pattern_9 = { 4d03c2 4d3bc2 4d13cc 4d0303 4d3b03 4d8903 4c8b13 }
   
    condition:

        7 of them and 
        filesize < 550912
}

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

3e49189e-bc3e-4770-8721-60ed56787e41

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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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