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<blockquote data-quote="maka" data-source="post: 754522" data-attributes="member: 73327">HiAs far as I know, you&#039;re right. If you open kernel32.dll on W10 with IDA (which has a free version, IDA Free) you&#039;ll see this:[ATTACH=full]194398[/ATTACH]OpenProcess from kernel32.dll will call OpenProcess from KernelBase.dll (on W10):[ATTACH=full]194400[/ATTACH]OpenProcess (kernel32.dll) =&gt; OpenProcess (KernelBase.dll) =&gt; NtOpenProcess (ntdll.dll)Yes, NtOpenProcess and ZwOpenProcess in usermode are the same:[ATTACH=full]194401[/ATTACH]if I&#039;m not mistaken, when you call NtOpenProcess/ZwOpenprocess from usermode it will call the real NtOpenProcess from ntoskrnl.exe and if you call ZwOpenProcess from kernel mode it will call ZwOpenProcess (ntoskrnl.exe).In kernel mode use ZwOpenProcessWelcome to the club <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite109" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />It&#039;s a pity that users like Wave and Opcode are no longer in the forum because they have a great knowledge about reversing and Windows Internals. I hope that one day they will return.PS: I may be wrong in some of my affirmations. If someone find false information in my post, please let me know.</blockquote>

[QUOTE="maka, post: 754522, member: 73327"] Hi As far as I know, you're right. If you open kernel32.dll on W10 with IDA (which has a free version, IDA Free) you'll see this: [ATTACH=full]194398[/ATTACH] OpenProcess from kernel32.dll will call OpenProcess from KernelBase.dll (on W10): [ATTACH=full]194400[/ATTACH] OpenProcess (kernel32.dll) => OpenProcess (KernelBase.dll) => NtOpenProcess (ntdll.dll) Yes, NtOpenProcess and ZwOpenProcess [B]in usermode[/B] are the same:[ATTACH=full]194401[/ATTACH] if I'm not mistaken, when you call NtOpenProcess/ZwOpenprocess from usermode it will call the real NtOpenProcess from ntoskrnl.exe and if you call ZwOpenProcess from kernel mode it will call ZwOpenProcess (ntoskrnl.exe). In kernel mode use ZwOpenProcess Welcome to the club :) It's a pity that users like Wave and Opcode are no longer in the forum because they have a great knowledge about reversing and Windows Internals. I hope that one day they will return. PS: I may be wrong in some of my affirmations. If someone find false information in my post, please let me know. [/QUOTE]

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