APT_MAL_WinntiLinux_Dropper_AzazelFork_May19

YARA detection rule by Silas Cutler (havex [@] chronicle.security), Chronicle Security · NOASSERTION

Detection of Linux variant of Winnti

rule APT_MAL_WinntiLinux_Dropper_AzazelFork_May19 : azazel_fork {
    meta:
        description = "Detection of Linux variant of Winnti"
        author = "Silas Cutler (havex [@] chronicle.security), Chronicle Security"
        version = "1.0"
        date = "2019-05-15"
        TLP = "White"
        sha256 = "4741c2884d1ca3a40dadd3f3f61cb95a59b11f99a0f980dbadc663b85eb77a2a"
    strings:
        $config_decr = { 48 89 45 F0 C7 45 EC 08 01 00 00 C7 45 FC 28 00 00 00 EB 31 8B 45 FC 48 63 D0 48 8B 45 F0 48 01 C2 8B 45 FC 48 63 C8 48 8B 45 F0 48 01 C8 0F B6 00 89 C1 8B 45 F8 89 C6 8B 45 FC 01 F0 31 C8 88 02 83 45 FC 01 }
        $export1 = "our_sockets"
        $export2 = "get_our_pids"
    condition:
        uint16(0) == 0x457f and all of them
}

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

135dcc17-ee29-4909-8ac9-41e808ad2089

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