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Video Reviews - Security and Privacy
NotPetya and Standard User Account
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<blockquote data-quote="Andy Ful" data-source="post: 649630" data-attributes="member: 32260"><p>Thanks for a very interesting video. It seems that NotPetya on SUA,<strong> initially</strong> drops perfc.dat to 'C:\ProgramData' (or 'C:\Documents and Settings\All Users\Application Data'), because it has not got the privileges to write into the Windows folder. <strong>Finally</strong>, the malware uses system executables (sctasks.exe, shutdown.exe) to create a scheduled task for restarting the system. Using sctasks.exe requires the SeTcbPrivilege (or higher, if I remember correctly).</p><p>On Administrator account, NotPetya uses SeDebugPrivilege, which allows dropping the malware perfc.dat directly to Windows folder.</p><p>I have a question, how did your malware sample get the tcb privilege on SUA?</p></blockquote><p></p>
[QUOTE="Andy Ful, post: 649630, member: 32260"] Thanks for a very interesting video. It seems that NotPetya on SUA,[B] initially[/B] drops perfc.dat to 'C:\ProgramData' (or 'C:\Documents and Settings\All Users\Application Data'), because it has not got the privileges to write into the Windows folder. [B]Finally[/B], the malware uses system executables (sctasks.exe, shutdown.exe) to create a scheduled task for restarting the system. Using sctasks.exe requires the SeTcbPrivilege (or higher, if I remember correctly). On Administrator account, NotPetya uses SeDebugPrivilege, which allows dropping the malware perfc.dat directly to Windows folder. I have a question, how did your malware sample get the tcb privilege on SUA? [/QUOTE]
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