malware_DtSftDriver

YARA detection rule by JPCERT/CC Incident Response Group · NOASSERTION

Hunt DtSftDriver

import "pe"
rule malware_DtSftDriver {
    meta:
        description = "Hunt DtSftDriver"
        author = "JPCERT/CC Incident Response Group"
    strings:
        $func0 = {8B 57 10 8B 01 8B 00 57 52 53 FF D0}

    condition:
        (uint16(0) == 0x5A4D)
        and (pe.subsystem == pe.SUBSYSTEM_NATIVE)
        and pe.imports("FltCreateCommunicationPort","FLTMSR.SYS")
        and pe.imports("FltRegisterFilter","FLTMSR.SYS")
        and pe.imports("ZwQueryValueKey","ntoskrnl.exe")
        and (filesize > 20KB)
        and (filesize < 300KB)
        and ( all of ($func*) )
}

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

e1e7beac-ee56-4c59-90f4-ed58864466a4

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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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