appinit_dll_hijacking_sysmon_behaviour

rule appinit_dll_hijacking_sysmon_behaviour {
 meta:
    author = "Emir Erdogan"
    description = "it can be used the AppInit_DLL functionality to achieve persistence by ensuring that every user mode process that is spawned will load its malicious DLL  License: https://github.com/Neo23x0/sigma/blob/master/LICENSE.Detection.Rules.md."
    reference = "https://tdm.socprime.com/tdm/info/DwmH4mVgWexR"
    version = "0.01"
    created = "2021-03-09"
    product = "windows"
    service = "sysmon"
    mitre = "T1103, T1055"

  events:
($selection.principal.process.file.full_path = "C:\\Windows\\System32\\cmd.exe" and $selection.target.process.file.full_path = "C:\\Windows\\System32\\reg.exe" and (re.regex($selection.target.process.command_line, `.*HKLM\\Software\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\LoadAppInit_DLLs.*`) or re.regex($selection.target.process.command_line, `.*HKEY_LOCAL_MACHINE\\Software\\Wow6432Node\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\LoadAppInit_DLLs.*`) or re.regex($selection.target.process.command_line, `.*HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows NT\\CurrentVersion\\WindowsAppInit_DLLs.*`) or re.regex($selection.target.process.command_line, `.*HKEY_LOCAL_MACHINE\\Software\\Wow6432Node\\Microsoft\\Windows NT\\CurrentVersion\\Windows\\AppInit_DLLs.*`)))

  condition:
    $selection
}