notepadexe_dll_search_order_hijackingsysmon

rule notepadexe_dll_search_order_hijackingsysmon {
 meta:
    author = "Den Iuzvyk"
    description = "notepad++.exe DLL search order hijacking  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/f4mYKTC1T7yd"
    version = "0.01"
    created = "2021-03-09"
    category = "sysmon"
    product = "windows"
    mitre = "persistence, defense_evasion, t1073, t1038"

  events:
(($selection.metadata.product_event_type = "7" and re.regex($selection.target.process.file.full_path, `.*notepad\+\+\.exe`) and re.regex($selection.target.process.file.full_path, `.*dbghelp\.dll`)) and not (re.regex($selection.target.process.file.full_path, `.*Windows\\System32.*`)))

  condition:
    $selection
}