suspicious_hwp_sub_processes

rule suspicious_hwp_sub_processes {
 meta:
    author = "Florian Roth"
    description = "Detects suspicious Hangul Word Processor (Hanword) sub processes that could indicate an exploitation  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/llsLDpuL96E6"
    version = "0.01"
    created = "2019/10/24"
    category = "process_creation"
    product = "windows"
    mitre = "execution, defense_evasion, initial_access, t1059, t1202, t1193, g0032"

  events:
(re.regex($selection.principal.process.file.full_path, `.*\\Hwp\.exe`) and re.regex($selection.target.process.file.full_path, `.*\\gbb\.exe`) and ($selection.metadata.product_event_type = "4688" or $selection.metadata.product_event_type = "1"))

  condition:
    $selection
}