Sublime Security medium experimental mql

Attachment: Archive with pdf, txt and wsf files

Detects a known Qakbot delivery method, zip file with pdf, txt and wsf file at a depth of 1

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Detection Logic

type.inbound
and any(attachments,
        .file_extension in~ $file_extensions_common_archives
        and length(distinct(filter(file.explode(.),
                                   .depth == 1
                                   and .flavors.mime in~ (
                                     "application/pdf",
                                     "text/plain"
                                   )
                            ),
                            .flavors.mime
                   )
        ) == 2
        and any(file.explode(.), .depth == 1 and .file_extension == "wsf")
)

Field Validations

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